covers: import from the master lane; stripe-alloc updated for the fold

The cover letters and design notes move here from zygo-linus-master-zb64
because misc-next is the submission lane.  stripe-alloc.txt is updated
for the fold of the four appends into their targets (remainder-sync
compute order into patch 25, the three meta-retirement fixes into patch
39): subject and diffstat back to 0/39, the append block leaves the
roadmap, and the prose describes the fixes as part of their patches.

Assisted-by: Claude:claude-opus-4-8

diff --git a/covers/DESIGN-3a-full-stripe-batching.md b/covers/DESIGN-3a-full-stripe-batching.md
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+# 3a: full-stripe write batching for stripe_alloc
+
+## Problem
+
+stripe_alloc guarantees a stripe is only written within one open-run
+lifetime, but it does not change *how* those writes are submitted.  If the
+writes covering one full stripe arrive at raid56 as N separate sub-stripe
+rbios, we pay N parity computations and N parity writes (plus up to one
+stripe-wide read) where one full-stripe write would pay one, with no read.
+Write amplification for parity is N-fold; a raid5 with 64K stripe elements
+doing 4K-file writeback could in principle touch parity 16 times per
+stripe column.
+
+The allocator gives us something the stock allocator never had: a
+guarantee that the rest of the stripe *will* be written soon (before the
+run closes, i.e. within the current transaction), or not at all.  That
+makes holding a partial write briefly a sound bet rather than a gamble.
+
+## Existing mitigations (already in mainline raid56)
+
+1. **Plug merging** (`raid_unplug`): rbios submitted by one task within
+   one blk_plug window are sorted and merged; stripes fully covered by
+   one writeback pass already go down as single full-stripe writes.
+   Writeback of many small files happens under one plug, so bulk flusher
+   traffic mostly merges already.
+2. **The rbio stripe cache** (`RBIO_CACHE`): after a sub-stripe write the
+   rbio's pages are cached; the next sub-stripe write to the same stripe
+   steals them and skips the RMW *read*.  Parity is still recomputed and
+   rewritten each time.
+
+So the residual cost of not batching is: (a) sub-stripe writes that span
+plug boundaries (batch edges, fsync-driven writeback of single files,
+sync/O_DIRECT writes), each paying a parity rewrite; (b) cache-missed
+sub-stripe writes paying a stripe read.
+
+## Measure before building
+
+Three counters classify every write rbio at `rmw_rbio` (bhive-only debug
+patch, `/sys/module/btrfs/parameters/rbio_write_*`):
+
+- `rbio_write_full` - full-stripe write: one parity write, no read;
+- `rbio_write_sub_nocache` - sub-stripe, read avoided (cache/coverage),
+  parity rewritten;
+- `rbio_write_sub_rmw` - sub-stripe with a stripe read (full RMW).
+
+Run streaming fill, mixed-size fill, and small-file churn under both
+stock and stripe_alloc.  Decision gate: if sub-stripe rbios are <~10% of
+stripe traffic under stripe_alloc (plug merging already doing the job),
+3a is low priority and the effort goes to 3b; if they dominate small-file
+workloads, build the parking layer.
+
+## Proposed mechanism (if the numbers justify it)
+
+Park partial write rbios instead of RMW-ing them, keyed by
+`full_stripe_logical`, for stripes that belong to an *open* stripe run
+(cheap lookup against the owning block group's run list; everything else
+takes today's path):
+
+- On arrival, merge into the parked rbio (same `rbio_add_bio` path).
+- When `dbitmap` covers every allocated-for-data sector: submit as a
+  full-stripe write.  This is the common streaming case.
+- Flush triggers for everything else (all must exist; each closes a
+  liveness hole):
+  1. **Run close/retire**: `btrfs_retire_open_stripes()` (and RO/removal
+     paths) flush parked rbios for the closed runs' stripes *before*
+     waiting for inflight IO to drain -- the drain waits on write_done,
+     which parked bios by definition have not reported.  Ordering: close
+     runs, flush parked, then wait.
+  2. **Ordered-extent waits**: `btrfs_start_ordered_extent()` kicks a
+     targeted flush of parked rbios overlapping the waited range, so
+     fsync latency is bounded by the flush, not by a timer.
+  3. **Timer fallback** (~100-500ms): catches everything else --
+     writeback stalls, error paths -- and bounds memory pinned by parked
+     pages.
+  4. **Reclaim/unmount/error**: unconditional flush.
+
+### Why completion-side accounting cannot drive the flush
+
+"All bytes of this stripe reported via write_done" can never become true
+while we hold the bios: write_done fires at IO completion, and parked
+bios have not been submitted.  Worse, some allocated bytes never produce
+bios at all: preallocated extents report at reservation, and discarded
+allocations (`find_free_extent` backout paths) report without IO.  So
+"stripe fully allocated" does not imply "bios for every sector will
+arrive".  The parking layer must therefore treat `dbitmap`-full as the
+*fast path* trigger and rely on triggers 1-4 for liveness, never on
+allocation-side bookkeeping implying future submissions.
+
+## Deadlock analysis
+
+- **Commit drain**: trigger 1 runs before the drain wait; parked rbios
+  submit, complete, report write_done, drain proceeds.  The flush must
+  not require a transaction join (it submits already-built bios; it
+  does not).
+- **fsync**: trigger 2 converts a would-be indefinite wait into a flush;
+  worst case is one extra sub-stripe RMW, i.e. today's behavior.
+- **Memory**: parked rbios pin their pages; the timer plus a cap on
+  parked count (flush-oldest beyond N) bounds it.
+- **Nested stripes**: parking is per-stripe and never blocks another
+  stripe's progress; lock ordering is table lock -> rbio, never the
+  reverse.
+
+## Staging
+
+1. Debug counters (done) and workload measurement -> decision gate.
+2. Parking table + full-coverage submit + triggers 1 and 4 (correctness
+   complete for non-fsync workloads; fsync still correct via timer).
+3. Trigger 2 (OE-wait targeted flush) for fsync latency.
+4. Measure again: parity write amplification (iostat vs data written),
+   RMW read counts, small-file throughput.  Soak + harness re-run
+   (parking must not perturb the write-hole matrix: the invariant
+   checker and the drain cover it).
+
+## Risks
+
+- Latency coupling: any path that waits on data IO without going through
+  an ordered-extent wait would stall until the timer; audit needed
+  (scrub, balance use their own IO; device replace reads via csums).
+- The parked rbio holds `full_stripe_lock`-adjacent state across
+  arrivals; the existing lock_stripe_add() machinery already handles
+  concurrent arrivals to a locked stripe via the plug/pending lists, so
+  parking extends that rather than inventing a new path.

diff --git a/covers/DESIGN-3b-log-relocation.md b/covers/DESIGN-3b-log-relocation.md
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+# 3b: log-tree full-stripe relocation (close the fsync-window hole)
+
+Status: refined design, post-3a.  The original sketch predates the
+full-stripe batching work; 3a built most of the machinery this needs, and
+this revision is reconciled against it and against the tree-log code.
+
+## Goal
+
+Upgrade the fsync/log-tree guarantee from "loss is detectable" to "every
+*completed* fsync survives a degraded crash; only an in-flight
+(incomplete) fsync is lost."  No stripe is ever torn by a second write in
+the log window.
+
+## Why the hole survives 3a
+
+Under stripe_alloc every fsync's data lands in fresh stripes of an open
+run, so it never endangers *committed* data.  But two log commits in one
+transaction can still share a stripe: fsync 1 writes sectors 0..k of
+stripe S (parity over 0..k), the run keeps filling S, fsync 2's writes to
+sectors k+1.. force an RMW that rewrites S's parity.  A degraded crash
+during fsync 2 tears fsync 1's data -- same shape as the write hole, one
+level down, confined to the log window.
+
+## Mechanism: close-at-log-commit, then copy-forward as optimization
+
+Case analysis of a logged extent's exposure:
+- In a **full** stripe: safe with no action.  Nothing ever writes a full
+  stripe again under stripe_alloc (COW never overwrites, no free sectors
+  to allocate), so no later RMW can tear it.
+- In a **partial** stripe: the only hazard is someone extending the
+  stripe later in the transaction and rewriting its parity.
+
+So the correctness core is tiny: **at each log commit, close the open
+run of every partial stripe holding a logged extent, and drain that
+stripe's in-flight data IO before the log super is written** (the
+log-window analogue of I2).  A closed run is never extended, so no
+future RMW, so every completed fsync survives -- universally, from the
+first fsync, with zero data movement, zero item rewriting, and no
+locking beyond the run machinery's own.  The cost is purely spatial:
+each touched stripe's unwritten tail is trapped (the standard
+stripe_alloc cost, reclaimed when the stripe frees or balance runs), and
+fsync-heavy workloads burn a fresh stripe per touched stripe per fsync.
+
+**Copy-forward is then a space optimization, not a correctness
+mechanism**: "close without the waste."  Scoped per inode -- each
+log-active inode gets its own LOG-class run, sticky after its first
+fsync -- copy-forward carries the inode's own live tail forward into a
+fresh stripe and frees the old one whole.  Own extents, own locks, own
+log commits: no foreign-referent problem exists in this scoping, because
+nobody else ever writes an inode's private log stripes.  Full-stripe
+write remains strictly cheaper than the RMW it replaces (one write vs
+read+write).
+
+## Convergence with 3a (what already exists)
+
+- **Parking is the capture point.**  An fsync's sub-stripe writes park
+  (REQ_SYNC, ~3ms deadline).  3b redirects the flush: instead of RMW into
+  stripe S, compose the full image of S (parked pages + prior sectors)
+  and submit it as one full-stripe rbio at the fresh address.  The parked
+  bios complete against the copy -- their data is durable there.
+- **The rbio stripe cache is the carry-forward source.**  Prior fsyncs'
+  sectors are usually still cached; on eviction, read them back from the
+  previous copy -- a plain read of a complete stripe, not an RMW.
+- **A third run class (LOG) is nearly free.**  The class enum, claim,
+  retire, accounting and I3 isolation are generic; log copies get their
+  own runs and never share stripes with cow or relocation data.
+- **Claim-time run-range exclusivity** (the ENOSPC-race fix) already
+  protects the copy lifecycle: a superseded copy's stripes cannot be
+  re-claimed while any old run object still drains.
+- **The window-sequence deferral** (retire race) is the template for
+  deferring main-tree insertion (below).
+
+## Address translation: the extent map is the single point
+
+Verified in tree-log.c: `log_one_extent()` constructs the log's file
+extent item from the in-memory extent map (`em->disk_bytenr`), not from
+FS-tree items, and `log_extent_csums()` looks csums up by that disk
+range.  Therefore copy-forward retargets the **extent maps** of every
+extent carried into the new copy:
+
+- the next log commit logs the new address automatically;
+- reads follow the maps to the newest copy;
+- csums are re-keyed to the new disk range (identical data, identical
+  sums, new offsets) and logged there.
+
+## Main tree adoption: audit verdict -- rewrite at copy time, not deferral
+
+The first draft deferred main-tree insertion for log-window extents to
+the transaction commit, making adoption a single insertion at the final
+address.  A consumer audit (verified against the code) kills that:
+
+1. **Read holes after extent map eviction** (silent wrong data).
+   btrfs_get_extent falls back to file extent items on a map miss, and
+   extent maps lose EXTENT_FLAG_PINNED at OE finish, so the shrinker can
+   evict them; a deferred item means the read sees a hole.  Pinning
+   log-window maps until commit trades this for shrinker interference.
+2. **Truncate/hole-punch resurrection** (silent corruption).  Deferred
+   insertion re-inserts an extent after a later same-transaction
+   btrfs_drop_extents removed the range; every file-extent-modifying
+   path would need a flush-deferred hook to preserve ordering.
+3. **Clone** walks source tree items (reflink.c btrfs_search_slot) and
+   would see holes; needs a materialization trigger.
+4. **Csum reads** (btrfs_lookup_bio_sums) come from the csum tree;
+   deferring csums breaks reads of evicted ranges regardless.
+5. **Qgroup tracing and commit reservations** shift wholesale to the
+   commit: every deferred insertion's metadata reservation must be
+   carried there or the commit can abort on ENOSPC.
+
+Classes 1 and 2 are silent-data-corruption surfaces; the mitigation list
+is long and each item guards an invariant elsewhere in the tree.  So:
+**keep OE-finish insertion exactly as today, and rewrite the items at
+copy-forward time.**  A backref walk of the (uncommitted) extent finds
+every referent -- which subsumes the reflink referent list entirely --
+and the rewrite is drop+reinsert at the same key with the new bytenr,
+plus a delayed-ref move and csum re-key, all in-memory tree operations
+inside the running transaction.  Reads, truncate ordering, clone, qgroup
+and reservations all keep their existing semantics because the tree is
+never missing an item.
+
+The foreign-referent locking problem that motivated fallback carve-outs
+in earlier drafts is dissolved by scoping: correctness comes from
+close-at-log-commit (no rewriting at all), and copy-forward operates
+only on an inode's private log stripes during its own log commits, so
+every rewritten item belongs to the locked, logged inode.  Reflink
+remains the one multi-referent case and is found by the backref walk.
+
+## Copy lifecycle
+
+- Copies are allocated from LOG-class runs (fully-free stripes).
+- Copy N-1 is freed only after log commit N's super lands (until then a
+  crash replays commit N-1, which references it).  Freed copies were
+  never referenced by any committed tree, so this is the immediate
+  reserved-extent free path -- no pinning -- and the claim-exclusivity
+  rule keeps their stripes out of new runs until drain.
+- After the transaction commit adopts the final copy, the log itself is
+  obsolete; log tree cleanup is unchanged (log items deletable, log space
+  never persistently allocated).
+- The stripes at the extents' *original* run addresses were allocated
+  but, once relocated, never written; their reservation is discarded
+  (reported, freed), leaving normal partial-stripe remainders that
+  stripe-free or balance reclaims.
+
+## Replay
+
+Almost entirely existing machinery.  Later log state supersedes earlier
+for overlapping file ranges; `replay_one_extent` inserts extent refs and
+csums for whatever the surviving items reference -- the newest copies.
+Superseded copies were never committed anywhere, so after replay they are
+simply free space; there is nothing to garbage collect.
+
+## Referents
+
+With copy-time rewriting there is no separate referent list: the backref
+walk at copy time finds every item pointing at each relocated extent,
+including reflinked copies (`write; fsync; reflink; fsync` is just a
+two-referent walk).  Extent maps for each referent inode are retargeted
+in the same pass.
+
+## Staging
+
+- **3b.0**: close-at-log-commit.  A settle primitive (find the open run
+  covering a logged extent, close it, flush parked rbios for its range,
+  wait its stripes' in-flight IO) called per logged extent from both log
+  paths (fast: log_one_extent; slow: the copy_items extent walk), before
+  the log super write.  Delivers the complete guarantee alone;
+  harness-testable RED (3a kernel) -> GREEN (3b.0).  **DONE, GREEN**:
+  fsync-window matrix on the 3b.0 kernel shows zero fsync loss of any
+  kind across all mounted cases (the 3a kernels showed csum-detected
+  losses), zero committed-data damage, controls clean.
+- **3b.1**: per-inode LOG-class runs + sticky log-active steering, so an
+  fsync-heavy inode stops invalidating shared cow stripes and each of
+  its fsyncs closes only its own stripe.  Implementation notes: sticky
+  bit set at btrfs_sync_file entry (before the fsync's own delalloc
+  flush, so even the first fsync is steered); private runs are never in
+  the band slots and are found by owner (ino) lookup under
+  stripe_run_lock, so a stale inode hint can never hit a wrong run; the
+  commit-time retire close walks the runs list (not the band slots) so
+  private runs retire under I2 like all others; allocation falls back to
+  the shared COW runs when no fully-free stripes remain (placement
+  regresses to 3b.0, safety unchanged).  Acceptance: mixed workload (one
+  non-fsync streaming writer + one frequent-fsync writer) must show the
+  streamer's extents no longer fragmented at each fsync and trapped
+  space bounded by the fsync inode's own tails; fsync-window matrix
+  stays GREEN.
+- **3b.2**: copy-forward within the inode's own log stripes to reclaim
+  the tails.  **Design pivot (2026-07-30), replacing the composition
+  approach below**: a code audit killed rbio-level composition -- a
+  parked rbio's caller bios can only complete through IO at the rbio's
+  own stripe (abandoning the stripe would require novel unwinding of
+  the stripe hash lock and plug-list hand-off), the rbio stripe cache
+  is only reachable by same-stripe hash collision (no by-address read
+  API), and every metadata step (extent map retarget, csum re-key, item
+  rewrite, delayed-ref move, qgroup pairing, reflink backref walk)
+  would need hand-built machinery.  All of it collapses into an
+  existing native operation: **re-dirty the tail ranges at fsync entry**
+  (the defrag pattern).  Mechanism:
+  - At each log commit, the settle step already closes the inode's run;
+    it now also reports whether the settled extent lies in the run's
+    final partial stripe, and the log call sites (log_one_extent,
+    copy_items -- both under the inode's log_mutex) record those
+    extents' file ranges on a small per-inode list.
+  - At the next fsync's entry, before the delalloc flush, each recorded
+    range still mapping to the old disk range is re-dirtied
+    (reservation + set-delalloc, as defrag does; skip on ENOSPC, page
+    non-residency, or compressed extents -- skipping only costs the
+    space win).  The flush then COWs carried + new data together into
+    the current private LOG run: new extent maps, csums, items, and
+    delayed refs all flow through the ordinary COW/ordered-extent
+    pipeline, and the log's modified-extents snapshot picks up the new
+    addresses automatically (verified: log_one_extent reads
+    em->disk_bytenr; the snapshot happens inside btrfs_log_inode after
+    the flush).  Reflinked ranges need nothing: foreign referents keep
+    the old extent alive and safe (closed stripe), only the space win
+    degrades.
+  - Write amplification is bounded: only the final partial stripe's
+    live extents are carried (< one full stripe per fsync); full
+    stripes are permanent and never carried.  Steady-state trapped
+    space per log-active inode drops from one tail per fsync to at
+    most one partial stripe (plus prior tails pinned until the running
+    transaction commits).
+  - **One safety hook is required**: when a logged-but-uncommitted
+    extent is dropped (carry, or any same-transaction overwrite), its
+    ADD and DROP delayed refs cancel and the space returns to the free
+    cache immediately -- the same immediate-return path as the ENOSPC
+    discard storms.  A crash after re-use but before the next log super
+    would leave the latest durable log referencing overwritten blocks
+    (csum-detected, but a completed-fsync loss).  Fix: in stripe_alloc
+    block groups, route the cancellation's space return through pinning
+    (freed at transaction commit, when the log is superseded anyway)
+    instead of immediate return.  Committed extents already pin on
+    free.  This also independently hardens the discard-storm scenario
+    that claim-time exclusivity fixed.
+  Superseded composition sketch, for the record: parked-rbio capture,
+  full-image composition from the rbio cache or a clean read of the
+  prior copy, extent map retargeting, csum re-key, item rewrite under
+  the inode's own locks, backref walk for reflinked referents.
+- **3b.3**: harness upgrade: the fsync-window matrix's acceptance
+  criterion changes from "loss is csum-detected" to "zero loss of
+  completed fsyncs".
+
+## Open questions
+
+- Sync writes that are not fsyncs (O_SYNC, sync(2)) take the same parked
+  path; steering them into LOG runs is harmless but means more copy
+  traffic -- possibly gate on an actual log commit happening.
+- Partial-stripe copies when the stripe is nearly empty: copying a
+  16-sector image to relocate 1 fsynced sector is the worst case; the
+  breakeven against the RMW it replaces is still favorable (RMW reads
+  and writes the same stripe width), but measure it.
+- Interaction with `btrfs receive`/prealloc in the log window: prealloc
+  extents are not log-relocated (no data to carry); confirm the deferral
+  exempts them.

diff --git a/covers/NOTE-statfs-unusable-divergence.md b/covers/NOTE-statfs-unusable-divergence.md
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+# Review flag: statfs treats stripe_unusable and zone_unusable differently
+
+This series makes statfs (`df`) subtract `bytes_stripe_unusable` from the data
+`f_bavail`, so a stripe_alloc filesystem reports the space it can actually
+allocate.  Zoned's `bytes_zone_unusable` is analogous free-but-not-allocatable
+space, but statfs does **not** subtract it today.  The two therefore disagree,
+and the difference is worth a maintainer decision rather than a silent choice.
+
+## The two behaviours
+
+- **Zoned `df` reports availability _after_ reclaim.**  `btrfs_statfs()` builds
+  `total_free_data` from `disk_total - disk_used` (and subtracts read-only
+  groups' free space).  `disk_used` tracks only `bytes_used`, and nothing
+  subtracts `bytes_zone_unusable`, so zone-unusable space is reported as
+  available.  It does not move when a balance runs; it only changes when the
+  zones are actually reset.  In effect `df` promises the space a GC/reset
+  *would* recover.
+
+  (Note an internal asymmetry already present in zoned: `bytes_zone_unusable`
+  *is* included in `btrfs_space_info_used()`, so the reservation layer treats it
+  as used even though statfs treats it as free.)
+
+- **stripe_alloc `df` (this series) reports availability _before_ reclaim.**
+  `bytes_stripe_unusable` is subtracted from `f_bavail`, so trapped space is not
+  reported as available, and `f_bavail` rises as balance frees whole stripes.
+  `df` promises only what can be allocated right now.
+
+## Why they were done differently here
+
+`bytes_stripe_unusable` is deliberately a pure statfs-side adjustment and is
+**not** part of `btrfs_space_info_used()` (the reservation layer is unchanged,
+so this series carries no ENOSPC-behaviour risk).  Subtracting it in statfs was
+the minimal way to stop `df` from promising space that the stripe-exclusive
+allocator will refuse.
+
+## The open question for review
+
+Ideally one convention applies to both.  Options:
+
+1. **Make zoned `df` subtract `bytes_zone_unusable` too** — honest-before-reclaim
+   everywhere.  Arguably a latent fix (today zoned `df` over-reports by
+   `zone_unusable`).  Small change, but it alters long-standing zoned `df`
+   output, so it needs an explicit ack that the current behaviour was not
+   intended.
+2. **Make stripe_alloc `df` match zoned** (don't subtract) — consistent, but
+   reintroduces "`df` shows space, allocation ENOSPCs" for stripe_alloc, which
+   is exactly what this change set out to fix.
+
+There may also be a *justifiable* reason to keep them different:
+`stripe_unusable` is not guaranteed to be fully recoverable — raid56 relocation
+need not repack surviving extents with 100% stripe efficiency, so some trapped
+space may persist across a balance.  Reporting it as unavailable
+(before-reclaim) is therefore defensible.  A zone reset, by contrast, recovers
+the whole zone deterministically, so reporting zone-unusable as available
+(after-reclaim) is defensible for zoned.  Under that reading the divergence is
+intentional and correct, not a bug.
+
+We do not know whether the current zoned `df` behaviour was a deliberate
+choice.  This note asks maintainers to confirm which convention they want; the
+statfs subtraction here is written stripe-specific precisely so it does not
+change zoned behaviour without that decision.

diff --git a/covers/compress-fixes.txt b/covers/compress-fixes.txt
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+From: Zygo Blaxell <ce3g8jdj@umail.furryterror.org>
+To: linux-btrfs@vger.kernel.org
+Subject: [PATCH 0/3] btrfs: fix and simplify inode flag vs compression interactions
+
+This series fixes problems in the interaction between btrfs inode flags
+and compression properties.
+
+Patch 1 fixes a bug that has existed since compression properties were
+introduced: any FS_IOC_SETFLAGS operation, even when not touching
+compression flags, overwrote an explicitly-set btrfs.compression property
+with the mount default.
+
+Patch 2 fixes four regressions introduced by commit f37c563bab42
+("btrfs: add missing check for nocow and compression inode flags").
+The conflict check in that commit was too strict and inconsistent:
+supposedly forbidden combinations of flags were still allowed, some flag
+pairs could not be changed together in the same ioctl, some flag pairs
+could only be changed if split across different ioctls, and inodes created
+on older kernels with conflicting flags set would reject changes to almost
+any inode attribute, even the ones not related to compression or datacow.
+
+Patch 3 reverts the artificial conflict between NODATACOW and NOCOMPRESS,
+introduced by f37c563bab42 and extended by 0e852ab8974c
+("btrfs: do not allow compression on nodatacow files"). There is no
+technical justification for rejecting this combination: NODATACOW files
+cannot be compressed regardless, so the presence of a NOCOMPRESS bit
+makes no difference in behavior. I have kept this change separate from
+patch 2 in case there is a justification that I am not aware of; if one
+exists, patch 3 can be dropped independently.
+
+Patch 4 adds support for per-inode compression levels.  Currently it is
+possible to add a ":5" suffix to a btrfs.compression xattr, but the
+suffix is ignored.  This change parses the suffix the same way as the
+mount option.  With patch 1, it retains both compression type and level
+when the fsattr is modified.
+
+Patch 5 adds stricter validation of the btrfs.compression xattr.  It does
+not affect current xattr values in existing filesystems, but it reject
+setting any new xattr values that cannot currently be completely parsed.
+This will introduce incompatible changes in use cases like
+
+    `ssh old-kernel-host btrfs send ... | ssh new-kernel-host btrfs receive ...`
+
+because new kernels will reject garbage that old kernels would have
+accepted.  I have put this change in a separate patch so it can be
+dropped cleanly if this behavior change is considered undesirable.
+
+---
+
+Zygo Blaxell (5):
+  btrfs: preserve btrfs.compression when setting inode flags
+  btrfs: fix nodatacow vs compression inode flag conflict check
+  btrfs: remove conflict between NODATACOW and NOCOMPRESS
+  btrfs: props: add per-inode compression level support
+  btrfs: props: validate compression property values strictly

diff --git a/covers/forensics/balance-zerofill-2026-08-07/FINDINGS.md b/covers/forensics/balance-zerofill-2026-08-07/FINDINGS.md
new file mode 100644 (file)
index 0000000..f6dcd5b
--- /dev/null
+++ b/covers/forensics/balance-zerofill-2026-08-07/FINDINGS.md
@@ -0,0 +1,89 @@
+# stripe_alloc balance-reclaim zero-fill — forensic record
+
+Bug found 2026-08-07 on kernel #115, fixed and validated on #116.
+
+## Root cause
+
+The growable-frontier path in `btrfs_alloc_from_open_stripe()` handed out
+`[r->offset, r->offset + num_bytes)` without calling `run_live_set()`.  The
+other two allocation sites (fast path, new-run install) both set the bits.
+
+Grow fires when an allocation exceeds the run's remainder, so the allocation
+begins at the old tail — usually mid-stripe — and spills across the
+full-stripe boundary.  The liveness map therefore called exactly those spill
+sectors dead.  When a later allocation filled the rest of the boundary row
+and its write went down as a separate partial rbio, `rmw_try_pad_full()`
+consulted the map, believed the spill was dead, zero-filled it and computed
+parity over the zeros.
+
+The failure is asymmetric: a map that under-reports liveness destroys
+committed data silently, while one that over-reports only forces an RMW
+fallback.  That is why the missing set was catastrophic and why the
+`live_nbits` overflow guard (which zeroes the map, making pad decline) is
+harmless.
+
+Fix: `run_live_set(r, r->offset, num_bytes, true)` in the grow path.
+
+## Scope
+
+- **raid5 and raid6 both affected.**  #115: balance aborts EIO,
+  `stripe_unusable` stuck ~1.2 GiB, tree a `eio=3081`, tree b `eio=2751`,
+  at both profiles.  Legacy allocator passes both.
+- Balance is not the culprit, only the first reader: first csum failures
+  land 5 s into balance, on data written during the plain fill.
+- #116 (fixed): balance-reclaim PASS at raid6 and raid5, both allocators,
+  `eio=0` everywhere, `stripe_unusable` collapses (802->2 MiB raid6,
+  1181->4 MiB raid5), dmesg clean.
+
+## Forensic signature (preserved array, fsid ed90a27f, gen 59)
+
+- 77 damaged rows, 2945 sectors.
+- Every damaged region is a contiguous PREFIX of a full-stripe row
+  (cols {0}, {0,1}, {0,1,2,3}; <= 256K).
+- Parity XOR-consistent with the zeros — a coherent writer computed parity
+  over the zero-fill; this is NOT a torn write.
+- The zeroed head is the cross-row spill of an extent that starts
+  mid-previous-row; the surviving tail belongs to the immediately following
+  inode, SAME generation.  (Example: a 512K extent at logical 7057702912
+  spanning row10c2 -> row11c1, with row 11 cols 0-1 zeroed.)
+- All failed csums = crc32c(4096 zeros) = 0x8941f998 in stored byte order.
+- Rows are isolated: ~0.3% of shared rows.
+
+Why other suites missed it: fill-edge has no per-file fsync, so boundary
+rows merge into single full-stripe writes.  The window needs a separate
+final writer on the boundary row, which balance-reclaim's rolling
+fsync-per-file oracle supplies.
+
+## Files here
+
+- `zfscan.py` — full-array damage scanner.  Parses the chunk tree (handles
+  variable stripe counts — late chunks can be 4-stripe raid6) and the csum
+  tree, flags all-zero sectors whose csum entry is not crc32c(zeros), and
+  XOR-checks parity per damaged row.  Paths at the top point at the
+  evidence array; edit `BASE`/`DEV`/`IMG` to rescan a different one.
+- `gencorr.py` — correlates damaged rows against an extent map
+  (`key/len/gen/owner` extracted from `dump-tree -t extent`) to show
+  head/tail ownership and generation.
+- `padrepro.sh` — fill-only repro with ftrace kprobes on
+  `btrfs_stripe_run_pad_mask` / `_write_abandoned` / `_write_done` plus the
+  reserve_extent and raid56_write tracepoints.  Never run; kept because the
+  probe set is the right one for any future pad-mask question.
+- `balance-reclaim6-115.{log,dmesg}` — the failing raid6 run.
+- `damage-map.txt` — the full scan output: all 77 damaged rows with chunk,
+  row, logical address, per-column damaged-sector counts, and the per-row
+  parity verdict (`parity_ok=True` on every one).
+- `gen-correlation.txt` — head/tail extent correlation for the damaged
+  rows: `(logical, len, gen, owner)` for the extent whose spill was zeroed
+  and for the one that survived.  39 rows have both extents present and
+  **all 39 are same-generation**; the remaining rows show `tail ext None`
+  (the tail extent had been freed by scan time), which is why the counter
+  reads `DIFF(<gen>->-1)` — that is a missing tail, not a generation
+  mismatch.
+
+## Reproducing without the evidence images
+
+`/boot/vmlinuz.prev` on the test VM is #115 (pre-fix), and
+`balance-reclaim-test.sh` reproduces the damage deterministically at either
+profile in well under an hour.  Revert the one-line fix on any later kernel
+for the same effect.  The raw images are therefore a convenience, not the
+only path back to a damaged array.

diff --git a/covers/forensics/balance-zerofill-2026-08-07/balance-legacy.txt b/covers/forensics/balance-zerofill-2026-08-07/balance-legacy.txt
new file mode 100644 (file)
index 0000000..3b978ba
--- /dev/null
+++ b/covers/forensics/balance-zerofill-2026-08-07/balance-legacy.txt
@@ -0,0 +1 @@
+Done, had to relocate 6 out of 8 chunks

diff --git a/covers/forensics/balance-zerofill-2026-08-07/balance-reclaim6-115.dmesg b/covers/forensics/balance-zerofill-2026-08-07/balance-reclaim6-115.dmesg
new file mode 100644 (file)
index 0000000..e9c51b4
--- /dev/null
+++ b/covers/forensics/balance-zerofill-2026-08-07/balance-reclaim6-115.dmesg
@@ -0,0 +1,2032 @@
+[ 6562.529383] [   T8913] loop8: detected capacity change from 0 to 3145728
+[ 6568.742930] [   T8927] loop9: detected capacity change from 0 to 3145728
+[ 6575.057937] [   T8941] loop10: detected capacity change from 0 to 3145728
+[ 6581.718073] [   T8955] loop11: detected capacity change from 0 to 3145728
+[ 6590.519195] [   T8969] loop12: detected capacity change from 0 to 4194304
+[ 6599.101710] [   T8983] loop13: detected capacity change from 0 to 4194304
+[ 6607.755111] [   T8997] loop14: detected capacity change from 0 to 4194304
+[ 6616.320851] [   T9011] loop15: detected capacity change from 0 to 4194304
+[ 6616.894344] [   T9015] BTRFS: device fsid 950d8a17-ae38-4bf6-929f-5f31e5f2edbe devid 1 transid 8 /dev/loop8 (7:8) scanned by (udev-worker) (9015)
+[ 6616.920757] [   T9014] BTRFS: device fsid 950d8a17-ae38-4bf6-929f-5f31e5f2edbe devid 2 transid 8 /dev/loop9 (7:9) scanned by (udev-worker) (9014)
+[ 6616.924930] [   T9032] BTRFS: device fsid 950d8a17-ae38-4bf6-929f-5f31e5f2edbe devid 4 transid 8 /dev/loop11 (7:11) scanned by (udev-worker) (9032)
+[ 6616.929162] [   T9030] BTRFS: device fsid 950d8a17-ae38-4bf6-929f-5f31e5f2edbe devid 3 transid 8 /dev/loop10 (7:10) scanned by (udev-worker) (9030)
+[ 6616.932979] [   T9015] BTRFS: device fsid 950d8a17-ae38-4bf6-929f-5f31e5f2edbe devid 5 transid 8 /dev/loop12 (7:12) scanned by (udev-worker) (9015)
+[ 6616.938661] [   T9017] BTRFS: device fsid 950d8a17-ae38-4bf6-929f-5f31e5f2edbe devid 6 transid 8 /dev/loop13 (7:13) scanned by mkfs.btrfs (9017)
+[ 6616.942611] [   T9017] BTRFS: device fsid 950d8a17-ae38-4bf6-929f-5f31e5f2edbe devid 7 transid 8 /dev/loop14 (7:14) scanned by mkfs.btrfs (9017)
+[ 6616.946570] [   T9017] BTRFS: device fsid 950d8a17-ae38-4bf6-929f-5f31e5f2edbe devid 8 transid 8 /dev/loop15 (7:15) scanned by mkfs.btrfs (9017)
+[ 6617.137446] [   T9043] BTRFS info (device loop8): first mount of filesystem 950d8a17-ae38-4bf6-929f-5f31e5f2edbe
+[ 6617.143504] [   T9043] BTRFS info (device loop8): using crc32c checksum algorithm
+[ 6617.250853] [   T9043] BTRFS info (device loop8): deleted orphan free space tree entries
+[ 6617.253514] [   T9043] BTRFS info (device loop8): checking UUID tree
+[ 6617.256750] [   T9043] BTRFS info (device loop8): enabling free space tree
+[ 6617.291726] [   T9086] BTRFS info (device loop8): resizing devid 1
+[ 6617.334904] [   T9086] BTRFS info (device loop8): resize device /dev/loop8 (devid 1) from 1610612736 to 536870912
+[ 6617.351811] [   T9095] BTRFS info (device loop8): resizing devid 2
+[ 6617.373113] [   T9095] BTRFS info (device loop8): resize device /dev/loop9 (devid 2) from 1610612736 to 536870912
+[ 6617.385105] [   T9098] BTRFS info (device loop8): resizing devid 3
+[ 6617.398051] [   T9098] BTRFS info (device loop8): resize device /dev/loop10 (devid 3) from 1610612736 to 536870912
+[ 6617.410571] [   T9099] BTRFS info (device loop8): resizing devid 4
+[ 6617.419354] [   T9099] BTRFS info (device loop8): resize device /dev/loop11 (devid 4) from 1610612736 to 536870912
+[ 6617.429687] [   T9100] BTRFS info (device loop8): resizing devid 5
+[ 6617.443885] [   T9100] BTRFS info (device loop8): resize device /dev/loop12 (devid 5) from 2147483648 to 1073741824
+[ 6617.455375] [   T9101] BTRFS info (device loop8): resizing devid 6
+[ 6617.467221] [   T9101] BTRFS info (device loop8): resize device /dev/loop13 (devid 6) from 2147483648 to 1073741824
+[ 6617.478638] [   T9102] BTRFS info (device loop8): resizing devid 7
+[ 6617.487915] [   T9102] BTRFS info (device loop8): resize device /dev/loop14 (devid 7) from 2147483648 to 1073741824
+[ 6617.501656] [   T9103] BTRFS info (device loop8): resizing devid 8
+[ 6617.511168] [   T9103] BTRFS info (device loop8): resize device /dev/loop15 (devid 8) from 2147483648 to 1073741824
+[ 6710.660863] [   T8892] bash (8892): drop_caches: 3
+[ 6711.268640] [   T9158] BTRFS info (device loop8): resizing devid 1
+[ 6711.302805] [   T9158] BTRFS info (device loop8): resize device /dev/loop8 (devid 1) from 536870912 to 1610612736
+[ 6711.318327] [   T9159] BTRFS info (device loop8): resizing devid 2
+[ 6711.332866] [   T9159] BTRFS info (device loop8): resize device /dev/loop9 (devid 2) from 536870912 to 1610612736
+[ 6711.349963] [   T9160] BTRFS info (device loop8): resizing devid 3
+[ 6711.362003] [   T9160] BTRFS info (device loop8): resize device /dev/loop10 (devid 3) from 536870912 to 1610612736
+[ 6711.377363] [   T9161] BTRFS info (device loop8): resizing devid 4
+[ 6711.390940] [   T9161] BTRFS info (device loop8): resize device /dev/loop11 (devid 4) from 536870912 to 1610612736
+[ 6711.404204] [   T9162] BTRFS info (device loop8): resizing devid 5
+[ 6711.418869] [   T9162] BTRFS info (device loop8): resize device /dev/loop12 (devid 5) from 1073741824 to 2147483648
+[ 6711.430004] [   T9163] BTRFS info (device loop8): resizing devid 6
+[ 6711.440106] [   T9163] BTRFS info (device loop8): resize device /dev/loop13 (devid 6) from 1073741824 to 2147483648
+[ 6711.454509] [   T9164] BTRFS info (device loop8): resizing devid 7
+[ 6711.467440] [   T9164] BTRFS info (device loop8): resize device /dev/loop14 (devid 7) from 1073741824 to 2147483648
+[ 6711.479316] [   T9165] BTRFS info (device loop8): resizing devid 8
+[ 6711.490049] [   T9165] BTRFS info (device loop8): resize device /dev/loop15 (devid 8) from 1073741824 to 2147483648
+[ 6711.503433] [   T9166] BTRFS warning (device loop8): balance: metadata profile raid1 has lower redundancy than data profile raid6
+[ 6711.525740] [   T9166] BTRFS info (device loop8): balance: start -d
+[ 6711.531145] [   T9166] BTRFS info (device loop8): relocating block group 3513778176 flags data|raid6
+[ 6716.089440] [   T9166] BTRFS info (device loop8): found 533 extents, stage: move data extents
+[ 6716.836783] [   T9166] BTRFS info (device loop8): found 533 extents, stage: update data pointers
+[ 6717.088802] [   T9166] BTRFS info (device loop8): relocating block group 3387949056 flags data|raid6
+[ 6718.109634] [   T9166] BTRFS info (device loop8): found 173 extents, stage: move data extents
+[ 6718.302034] [   T9166] BTRFS info (device loop8): found 173 extents, stage: update data pointers
+[ 6718.387278] [   T9166] BTRFS info (device loop8): relocating block group 2835480576 flags data|raid6
+[ 6722.683208] [   T9166] BTRFS info (device loop8): found 709 extents, stage: move data extents
+[ 6723.276853] [   T9166] BTRFS info (device loop8): found 709 extents, stage: update data pointers
+[ 6723.590815] [   T9166] BTRFS info (device loop8): relocating block group 2130837504 flags data|raid6
+[ 6730.525772] [   T9166] BTRFS info (device loop8): found 1574 extents, stage: move data extents
+[ 6731.341340] [   T9166] BTRFS info (device loop8): found 1574 extents, stage: update data pointers
+[ 6731.835468] [   T9166] BTRFS info (device loop8): relocating block group 1426194432 flags data|raid6
+[ 6737.499993] [   T9166] BTRFS info (device loop8): found 1799 extents, stage: move data extents
+[ 6738.357463] [   T9166] BTRFS info (device loop8): found 1799 extents, stage: update data pointers
+[ 6738.909879] [   T9166] BTRFS info (device loop8): relocating block group 298844160 flags data|raid6
+[ 6752.695253] [   T9166] BTRFS info (device loop8): found 11089 extents, stage: move data extents
+[ 6753.922653] [   T9166] BTRFS info (device loop8): found 11089 extents, stage: update data pointers
+[ 6755.248501] [   T9166] BTRFS info (device loop8): balance: ended with status: 0
+[ 6935.365586] [   T8892] bash (8892): drop_caches: 3
+[ 6968.738848] [   T8892] bash (8892): drop_caches: 3
+[ 7035.922513] [   T9228] BTRFS info (device loop8): last unmount of filesystem 950d8a17-ae38-4bf6-929f-5f31e5f2edbe
+[ 7042.976770] [   T9267] loop8: detected capacity change from 0 to 3145728
+[ 7049.939105] [   T9279] loop9: detected capacity change from 0 to 3145728
+[ 7056.808637] [   T9291] loop10: detected capacity change from 0 to 3145728
+[ 7063.953975] [   T9303] loop11: detected capacity change from 0 to 3145728
+[ 7073.043413] [   T9315] loop12: detected capacity change from 0 to 4194304
+[ 7082.511366] [   T9327] loop13: detected capacity change from 0 to 4194304
+[ 7090.663962] [   T9339] loop14: detected capacity change from 0 to 4194304
+[ 7099.404466] [   T9351] loop15: detected capacity change from 0 to 4194304
+[ 7099.874194] [   T9354] BTRFS: device fsid ed90a27f-278a-4bc7-a992-7a962a85e158 devid 1 transid 8 /dev/loop8 (7:8) scanned by (udev-worker) (9354)
+[ 7099.889338] [   T9366] BTRFS: device fsid ed90a27f-278a-4bc7-a992-7a962a85e158 devid 2 transid 8 /dev/loop9 (7:9) scanned by (udev-worker) (9366)
+[ 7099.914913] [   T9368] BTRFS: device fsid ed90a27f-278a-4bc7-a992-7a962a85e158 devid 3 transid 8 /dev/loop10 (7:10) scanned by (udev-worker) (9368)
+[ 7099.921280] [   T9354] BTRFS: device fsid ed90a27f-278a-4bc7-a992-7a962a85e158 devid 5 transid 8 /dev/loop12 (7:12) scanned by (udev-worker) (9354)
+[ 7099.927306] [   T9370] BTRFS: device fsid ed90a27f-278a-4bc7-a992-7a962a85e158 devid 4 transid 8 /dev/loop11 (7:11) scanned by (udev-worker) (9370)
+[ 7099.934469] [   T9373] BTRFS: device fsid ed90a27f-278a-4bc7-a992-7a962a85e158 devid 6 transid 8 /dev/loop13 (7:13) scanned by (udev-worker) (9373)
+[ 7099.945040] [   T9353] BTRFS: device fsid ed90a27f-278a-4bc7-a992-7a962a85e158 devid 7 transid 8 /dev/loop14 (7:14) scanned by mkfs.btrfs (9353)
+[ 7099.948503] [   T9353] BTRFS: device fsid ed90a27f-278a-4bc7-a992-7a962a85e158 devid 8 transid 8 /dev/loop15 (7:15) scanned by mkfs.btrfs (9353)
+[ 7100.016142] [   T9381] BTRFS info (device loop8): first mount of filesystem ed90a27f-278a-4bc7-a992-7a962a85e158
+[ 7100.019381] [   T9381] BTRFS info (device loop8): using crc32c checksum algorithm
+[ 7100.070541] [   T9381] BTRFS info (device loop8): deleted orphan free space tree entries
+[ 7100.073932] [   T9381] BTRFS info (device loop8): checking UUID tree
+[ 7100.076758] [   T9381] BTRFS info (device loop8): enabling free space tree
+[ 7100.093484] [   T9397] BTRFS info (device loop8): resizing devid 1
+[ 7100.119282] [   T9397] BTRFS info (device loop8): resize device /dev/loop8 (devid 1) from 1610612736 to 536870912
+[ 7100.132656] [   T9414] BTRFS info (device loop8): resizing devid 2
+[ 7100.146458] [   T9414] BTRFS info (device loop8): resize device /dev/loop9 (devid 2) from 1610612736 to 536870912
+[ 7100.160819] [   T9420] BTRFS info (device loop8): resizing devid 3
+[ 7100.176470] [   T9420] BTRFS info (device loop8): resize device /dev/loop10 (devid 3) from 1610612736 to 536870912
+[ 7100.189003] [   T9421] BTRFS info (device loop8): resizing devid 4
+[ 7100.207603] [   T9421] BTRFS info (device loop8): resize device /dev/loop11 (devid 4) from 1610612736 to 536870912
+[ 7100.218233] [   T9422] BTRFS info (device loop8): resizing devid 5
+[ 7100.231476] [   T9422] BTRFS info (device loop8): resize device /dev/loop12 (devid 5) from 2147483648 to 1073741824
+[ 7100.242931] [   T9428] BTRFS info (device loop8): resizing devid 6
+[ 7100.262222] [   T9428] BTRFS info (device loop8): resize device /dev/loop13 (devid 6) from 2147483648 to 1073741824
+[ 7100.275169] [   T9429] BTRFS info (device loop8): resizing devid 7
+[ 7100.293666] [   T9429] BTRFS info (device loop8): resize device /dev/loop14 (devid 7) from 2147483648 to 1073741824
+[ 7100.305950] [   T9431] BTRFS info (device loop8): resizing devid 8
+[ 7100.321166] [   T9431] BTRFS info (device loop8): resize device /dev/loop15 (devid 8) from 2147483648 to 1073741824
+[ 7199.426065] [   T8892] bash (8892): drop_caches: 3
+[ 7199.680518] [   T9468] BTRFS info (device loop8): resizing devid 1
+[ 7199.704043] [   T9468] BTRFS info (device loop8): resize device /dev/loop8 (devid 1) from 536870912 to 1610612736
+[ 7199.714794] [   T9469] BTRFS info (device loop8): resizing devid 2
+[ 7199.726200] [   T9469] BTRFS info (device loop8): resize device /dev/loop9 (devid 2) from 536870912 to 1610612736
+[ 7199.737050] [   T9470] BTRFS info (device loop8): resizing devid 3
+[ 7199.749799] [   T9470] BTRFS info (device loop8): resize device /dev/loop10 (devid 3) from 536870912 to 1610612736
+[ 7199.759396] [   T9471] BTRFS info (device loop8): resizing devid 4
+[ 7199.770738] [   T9471] BTRFS info (device loop8): resize device /dev/loop11 (devid 4) from 536870912 to 1610612736
+[ 7199.782368] [   T9472] BTRFS info (device loop8): resizing devid 5
+[ 7199.793119] [   T9472] BTRFS info (device loop8): resize device /dev/loop12 (devid 5) from 1073741824 to 2147483648
+[ 7199.805501] [   T9473] BTRFS info (device loop8): resizing devid 6
+[ 7199.821225] [   T9473] BTRFS info (device loop8): resize device /dev/loop13 (devid 6) from 1073741824 to 2147483648
+[ 7199.831381] [   T9474] BTRFS info (device loop8): resizing devid 7
+[ 7199.841202] [   T9474] BTRFS info (device loop8): resize device /dev/loop14 (devid 7) from 1073741824 to 2147483648
+[ 7199.852022] [   T9475] BTRFS info (device loop8): resizing devid 8
+[ 7199.865649] [   T9475] BTRFS info (device loop8): resize device /dev/loop15 (devid 8) from 1073741824 to 2147483648
+[ 7199.877467] [   T9476] BTRFS warning (device loop8): balance: metadata profile raid1 has lower redundancy than data profile raid6
+[ 7199.891537] [   T9476] BTRFS info (device loop8): balance: start -d
+[ 7199.894133] [   T9476] BTRFS info (device loop8): relocating block group 3513778176 flags data|raid6
+[ 7203.727982] [   T9476] BTRFS info (device loop8): found 661 extents, stage: move data extents
+[ 7204.131502] [   T9476] BTRFS info (device loop8): found 661 extents, stage: update data pointers
+[ 7204.331186] [   T9476] BTRFS info (device loop8): relocating block group 3387949056 flags data|raid6
+[ 7205.198792] [   T5959] BTRFS warning (device loop8): csum failed root -9 ino 258 off 112132096 logical 3500081152 csum 0x8941f998 expected csum 0x3d51f423 mirror 1
+[ 7205.203945] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500015616 mirror 1 root 256 inode 21028 offset 393216 length 4096 links 1 (path: f20771)
+[ 7205.206489] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500081152 mirror 1 root 256 inode 21028 offset 458752 length 4096 links 1 (path: f20771)
+[ 7205.207961] [   T9091] btrfs_dev_stat_inc_and_print: 26 callbacks suppressed
+[ 7205.207966] [   T9091] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 1, gen 0
+[ 7205.208499] [   T5959] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1, gen 0
+[ 7205.210238] [   T9091] BTRFS warning (device loop8): csum failed root -9 ino 258 off 112070656 logical 3500019712 csum 0x8941f998 expected csum 0xf572ffb1 mirror 1
+[ 7205.210694] [   T5959] BTRFS warning (device loop8): csum failed root -9 ino 258 off 112136192 logical 3500085248 csum 0x8941f998 expected csum 0x89f71780 mirror 1
+[ 7205.211579] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500019712 mirror 1 root 256 inode 21028 offset 397312 length 4096 links 1 (path: f20771)
+[ 7205.213139] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500085248 mirror 1 root 256 inode 21028 offset 462848 length 4096 links 1 (path: f20771)
+[ 7205.214040] [   T9091] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 2, gen 0
+[ 7205.214096] [   T9091] BTRFS warning (device loop8): csum failed root -9 ino 258 off 112074752 logical 3500023808 csum 0x8941f998 expected csum 0xc836b7d8 mirror 1
+[ 7205.214986] [   T5959] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 2, gen 0
+[ 7205.216069] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500023808 mirror 1 root 256 inode 21028 offset 401408 length 4096 links 1 (path: f20771)
+[ 7205.216603] [   T5959] BTRFS warning (device loop8): csum failed root -9 ino 258 off 112140288 logical 3500089344 csum 0x8941f998 expected csum 0xeecde1ef mirror 1
+[ 7205.217464] [   T9091] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3, gen 0
+[ 7205.218362] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500089344 mirror 1 root 256 inode 21028 offset 466944 length 4096 links 1 (path: f20771)
+[ 7205.219229] [   T9091] BTRFS warning (device loop8): csum failed root -9 ino 258 off 112078848 logical 3500027904 csum 0x8941f998 expected csum 0xcd9d8b13 mirror 1
+[ 7205.220141] [   T5959] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 3, gen 0
+[ 7205.220465] [   T9109] BTRFS warning (device loop8): csum failed root -9 ino 258 off 112066560 logical 3500015616 csum 0x8941f998 expected csum 0xf9aa6b56 mirror 2
+[ 7205.220866] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500027904 mirror 1 root 256 inode 21028 offset 405504 length 4096 links 1 (path: f20771)
+[ 7205.221188] [   T9107] BTRFS warning (device loop8): csum failed root -9 ino 258 off 112132096 logical 3500081152 csum 0x8941f998 expected csum 0x3d51f423 mirror 2
+[ 7205.221529] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500015616 mirror 2 root 256 inode 21028 offset 393216 length 4096 links 1 (path: f20771)
+[ 7205.221551] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500081152 mirror 2 root 256 inode 21028 offset 458752 length 4096 links 1 (path: f20771)
+[ 7205.221670] [   T5959] BTRFS warning (device loop8): csum failed root -9 ino 258 off 112144384 logical 3500093440 csum 0x8941f998 expected csum 0x85292f1b mirror 1
+[ 7205.221918] [   T7877] BTRFS warning (device loop8): csum failed root -9 ino 258 off 112070656 logical 3500019712 csum 0x8941f998 expected csum 0xf572ffb1 mirror 2
+[ 7205.222062] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500019712 mirror 2 root 256 inode 21028 offset 397312 length 4096 links 1 (path: f20771)
+[ 7205.222628] [   T9091] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 4, gen 0
+[ 7205.222642] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500085248 mirror 2 root 256 inode 21028 offset 462848 length 4096 links 1 (path: f20771)
+[ 7205.223002] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500023808 mirror 2 root 256 inode 21028 offset 401408 length 4096 links 1 (path: f20771)
+[ 7205.223458] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500015616 mirror 3 root 256 inode 21028 offset 393216 length 4096 links 1 (path: f20771)
+[ 7205.223594] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500093440 mirror 1 root 256 inode 21028 offset 471040 length 4096 links 1 (path: f20771)
+[ 7205.223607] [   T5959] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 4, gen 0
+[ 7205.224297] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500089344 mirror 2 root 256 inode 21028 offset 466944 length 4096 links 1 (path: f20771)
+[ 7205.224415] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500032000 mirror 1 root 256 inode 21028 offset 409600 length 4096 links 1 (path: f20771)
+[ 7205.224425] [   T9091] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 5, gen 0
+[ 7205.224450] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500081152 mirror 3 root 256 inode 21028 offset 458752 length 4096 links 1 (path: f20771)
+[ 7205.224527] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500036096 mirror 1 root 256 inode 21028 offset 413696 length 4096 links 1 (path: f20771)
+[ 7205.224534] [   T9091] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 6, gen 0
+[ 7205.224627] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500097536 mirror 1 root 256 inode 21028 offset 475136 length 4096 links 1 (path: f20771)
+[ 7205.224632] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500040192 mirror 1 root 256 inode 21028 offset 417792 length 4096 links 1 (path: f20771)
+[ 7205.224843] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500044288 mirror 1 root 256 inode 21028 offset 421888 length 4096 links 1 (path: f20771)
+[ 7205.224938] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500048384 mirror 1 root 256 inode 21028 offset 425984 length 4096 links 1 (path: f20771)
+[ 7205.225034] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500052480 mirror 1 root 256 inode 21028 offset 430080 length 4096 links 1 (path: f20771)
+[ 7205.225074] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500085248 mirror 3 root 256 inode 21028 offset 462848 length 4096 links 1 (path: f20771)
+[ 7205.225081] [   T9096] BTRFS warning (device loop8): checksum error at logical 3500019712 mirror 3 root 256 inode 21028 offset 397312 length 4096 links 1 (path: f20771)
+[ 7205.225534] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500056576 mirror 1 root 256 inode 21028 offset 434176 length 4096 links 1 (path: f20771)
+[ 7205.225681] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500060672 mirror 1 root 256 inode 21028 offset 438272 length 4096 links 1 (path: f20771)
+[ 7205.226021] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500064768 mirror 1 root 256 inode 21028 offset 442368 length 4096 links 1 (path: f20771)
+[ 7205.226121] [   T9096] BTRFS warning (device loop8): checksum error at logical 3500093440 mirror 2 root 256 inode 21028 offset 471040 length 4096 links 1 (path: f20771)
+[ 7205.226414] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500023808 mirror 3 root 256 inode 21028 offset 401408 length 4096 links 1 (path: f20771)
+[ 7205.226994] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500101632 mirror 1 root 256 inode 21028 offset 479232 length 4096 links 1 (path: f20771)
+[ 7205.227313] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500027904 mirror 2 root 256 inode 21028 offset 405504 length 4096 links 1 (path: f20771)
+[ 7205.227686] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500089344 mirror 3 root 256 inode 21028 offset 466944 length 4096 links 1 (path: f20771)
+[ 7205.227951] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500068864 mirror 1 root 256 inode 21028 offset 446464 length 4096 links 1 (path: f20771)
+[ 7205.228076] [   T9096] BTRFS warning (device loop8): checksum error at logical 3500032000 mirror 2 root 256 inode 21028 offset 409600 length 4096 links 1 (path: f20771)
+[ 7205.228452] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500081152 mirror 4 root 256 inode 21028 offset 458752 length 4096 links 1 (path: f20771)
+[ 7205.228670] [   T9096] BTRFS warning (device loop8): checksum error at logical 3500036096 mirror 2 root 256 inode 21028 offset 413696 length 4096 links 1 (path: f20771)
+[ 7205.228901] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500105728 mirror 1 root 256 inode 21028 offset 483328 length 4096 links 1 (path: f20771)
+[ 7205.229568] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500040192 mirror 2 root 256 inode 21028 offset 417792 length 4096 links 1 (path: f20771)
+[ 7205.229978] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500072960 mirror 1 root 256 inode 21028 offset 450560 length 4096 links 1 (path: f20771)
+[ 7205.230070] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500044288 mirror 2 root 256 inode 21028 offset 421888 length 4096 links 1 (path: f20771)
+[ 7205.230417] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500048384 mirror 2 root 256 inode 21028 offset 425984 length 4096 links 1 (path: f20771)
+[ 7205.230746] [   T9096] BTRFS warning (device loop8): checksum error at logical 3500052480 mirror 2 root 256 inode 21028 offset 430080 length 4096 links 1 (path: f20771)
+[ 7205.230950] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500109824 mirror 1 root 256 inode 21028 offset 487424 length 4096 links 1 (path: f20771)
+[ 7205.231101] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500085248 mirror 4 root 256 inode 21028 offset 462848 length 4096 links 1 (path: f20771)
+[ 7205.231433] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500019712 mirror 4 root 256 inode 21028 offset 397312 length 4096 links 1 (path: f20771)
+[ 7205.231709] [   T9096] BTRFS warning (device loop8): checksum error at logical 3500056576 mirror 2 root 256 inode 21028 offset 434176 length 4096 links 1 (path: f20771)
+[ 7205.231951] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500077056 mirror 1 root 256 inode 21028 offset 454656 length 4096 links 1 (path: f20771)
+[ 7205.231984] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500060672 mirror 2 root 256 inode 21028 offset 438272 length 4096 links 1 (path: f20771)
+[ 7205.232338] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500093440 mirror 3 root 256 inode 21028 offset 471040 length 4096 links 1 (path: f20771)
+[ 7205.232610] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500113920 mirror 1 root 256 inode 21028 offset 491520 length 4096 links 1 (path: f20771)
+[ 7205.232629] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500023808 mirror 4 root 256 inode 21028 offset 401408 length 4096 links 1 (path: f20771)
+[ 7205.233059] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500015616 mirror 4 root 256 inode 21028 offset 393216 length 4096 links 1 (path: f20771)
+[ 7205.233390] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500097536 mirror 2 root 256 inode 21028 offset 475136 length 4096 links 1 (path: f20771)
+[ 7205.233651] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500027904 mirror 3 root 256 inode 21028 offset 405504 length 4096 links 1 (path: f20771)
+[ 7205.233979] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500089344 mirror 4 root 256 inode 21028 offset 466944 length 4096 links 1 (path: f20771)
+[ 7205.234186] [   T9096] BTRFS warning (device loop8): checksum error at logical 3500064768 mirror 2 root 256 inode 21028 offset 442368 length 4096 links 1 (path: f20771)
+[ 7205.234537] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500118016 mirror 1 root 256 inode 21028 offset 495616 length 4096 links 1 (path: f20771)
+[ 7205.235233] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500032000 mirror 3 root 256 inode 21028 offset 409600 length 4096 links 1 (path: f20771)
+[ 7205.236350] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500081152 mirror 5 root 256 inode 21028 offset 458752 length 4096 links 1 (path: f20771)
+[ 7205.236619] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500122112 mirror 1 root 256 inode 21028 offset 499712 length 4096 links 1 (path: f20771)
+[ 7205.237927] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500036096 mirror 3 root 256 inode 21028 offset 413696 length 4096 links 1 (path: f20771)
+[ 7205.238248] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500101632 mirror 2 root 256 inode 21028 offset 479232 length 4096 links 1 (path: f20771)
+[ 7205.238519] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500126208 mirror 1 root 256 inode 21028 offset 503808 length 4096 links 1 (path: f20771)
+[ 7205.238560] [   T9096] BTRFS warning (device loop8): checksum error at logical 3500040192 mirror 3 root 256 inode 21028 offset 417792 length 4096 links 1 (path: f20771)
+[ 7205.238855] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500068864 mirror 2 root 256 inode 21028 offset 446464 length 4096 links 1 (path: f20771)
+[ 7205.239178] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500044288 mirror 3 root 256 inode 21028 offset 421888 length 4096 links 1 (path: f20771)
+[ 7205.239554] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500048384 mirror 3 root 256 inode 21028 offset 425984 length 4096 links 1 (path: f20771)
+[ 7205.239924] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500052480 mirror 3 root 256 inode 21028 offset 430080 length 4096 links 1 (path: f20771)
+[ 7205.239945] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500130304 mirror 1 root 256 inode 21028 offset 507904 length 4096 links 1 (path: f20771)
+[ 7205.240061] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500134400 mirror 1 root 256 inode 21028 offset 512000 length 4096 links 1 (path: f20771)
+[ 7205.240195] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500105728 mirror 2 root 256 inode 21028 offset 483328 length 4096 links 1 (path: f20771)
+[ 7205.240692] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500138496 mirror 1 root 256 inode 21028 offset 516096 length 4096 links 1 (path: f20771)
+[ 7205.240861] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500142592 mirror 1 root 256 inode 21028 offset 520192 length 4096 links 1 (path: f20771)
+[ 7205.241402] [   T9096] BTRFS warning (device loop8): checksum error at logical 3500085248 mirror 5 root 256 inode 21028 offset 462848 length 4096 links 1 (path: f20771)
+[ 7205.241680] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500019712 mirror 5 root 256 inode 21028 offset 397312 length 4096 links 1 (path: f20771)
+[ 7205.242423] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500056576 mirror 3 root 256 inode 21028 offset 434176 length 4096 links 1 (path: f20771)
+[ 7205.243143] [   T9096] BTRFS warning (device loop8): checksum error at logical 3500072960 mirror 2 root 256 inode 21028 offset 450560 length 4096 links 1 (path: f20771)
+[ 7205.243473] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500060672 mirror 3 root 256 inode 21028 offset 438272 length 4096 links 1 (path: f20771)
+[ 7205.243779] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500093440 mirror 4 root 256 inode 21028 offset 471040 length 4096 links 1 (path: f20771)
+[ 7205.244216] [   T9096] BTRFS warning (device loop8): checksum error at logical 3500109824 mirror 2 root 256 inode 21028 offset 487424 length 4096 links 1 (path: f20771)
+[ 7205.244675] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500023808 mirror 5 root 256 inode 21028 offset 401408 length 4096 links 1 (path: f20771)
+[ 7205.244975] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500015616 mirror 5 root 256 inode 21028 offset 393216 length 4096 links 1 (path: f20771)
+[ 7205.245243] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500077056 mirror 2 root 256 inode 21028 offset 454656 length 4096 links 1 (path: f20771)
+[ 7205.245439] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500027904 mirror 4 root 256 inode 21028 offset 405504 length 4096 links 1 (path: f20771)
+[ 7205.245814] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500089344 mirror 5 root 256 inode 21028 offset 466944 length 4096 links 1 (path: f20771)
+[ 7205.246033] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500064768 mirror 3 root 256 inode 21028 offset 442368 length 4096 links 1 (path: f20771)
+[ 7205.246400] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500113920 mirror 2 root 256 inode 21028 offset 491520 length 4096 links 1 (path: f20771)
+[ 7205.246568] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500032000 mirror 4 root 256 inode 21028 offset 409600 length 4096 links 1 (path: f20771)
+[ 7205.246969] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500097536 mirror 3 root 256 inode 21028 offset 475136 length 4096 links 1 (path: f20771)
+[ 7205.247143] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500118016 mirror 2 root 256 inode 21028 offset 495616 length 4096 links 1 (path: f20771)
+[ 7205.247322] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500081152 mirror 6 root 256 inode 21028 offset 458752 length 4096 links 1 (path: f20771)
+[ 7205.247534] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500101632 mirror 3 root 256 inode 21028 offset 479232 length 4096 links 1 (path: f20771)
+[ 7205.247876] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500122112 mirror 2 root 256 inode 21028 offset 499712 length 4096 links 1 (path: f20771)
+[ 7205.247979] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500040192 mirror 4 root 256 inode 21028 offset 417792 length 4096 links 1 (path: f20771)
+[ 7205.248286] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500068864 mirror 3 root 256 inode 21028 offset 446464 length 4096 links 1 (path: f20771)
+[ 7205.248419] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500044288 mirror 4 root 256 inode 21028 offset 421888 length 4096 links 1 (path: f20771)
+[ 7205.248668] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500036096 mirror 4 root 256 inode 21028 offset 413696 length 4096 links 1 (path: f20771)
+[ 7205.249028] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500126208 mirror 2 root 256 inode 21028 offset 503808 length 4096 links 1 (path: f20771)
+[ 7205.249307] [   T9096] BTRFS warning (device loop8): checksum error at logical 3500130304 mirror 2 root 256 inode 21028 offset 507904 length 4096 links 1 (path: f20771)
+[ 7205.250179] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500138496 mirror 2 root 256 inode 21028 offset 516096 length 4096 links 1 (path: f20771)
+[ 7205.250371] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500048384 mirror 4 root 256 inode 21028 offset 425984 length 4096 links 1 (path: f20771)
+[ 7205.250554] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500134400 mirror 2 root 256 inode 21028 offset 512000 length 4096 links 1 (path: f20771)
+[ 7205.250648] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500105728 mirror 3 root 256 inode 21028 offset 483328 length 4096 links 1 (path: f20771)
+[ 7205.250855] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500085248 mirror 6 root 256 inode 21028 offset 462848 length 4096 links 1 (path: f20771)
+[ 7205.251230] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500052480 mirror 4 root 256 inode 21028 offset 430080 length 4096 links 1 (path: f20771)
+[ 7205.251334] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500142592 mirror 2 root 256 inode 21028 offset 520192 length 4096 links 1 (path: f20771)
+[ 7205.252043] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500072960 mirror 3 root 256 inode 21028 offset 450560 length 4096 links 1 (path: f20771)
+[ 7205.252049] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500019712 mirror 6 root 256 inode 21028 offset 397312 length 4096 links 1 (path: f20771)
+[ 7205.252345] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500093440 mirror 5 root 256 inode 21028 offset 471040 length 4096 links 1 (path: f20771)
+[ 7205.252637] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500056576 mirror 4 root 256 inode 21028 offset 434176 length 4096 links 1 (path: f20771)
+[ 7205.252936] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500023808 mirror 6 root 256 inode 21028 offset 401408 length 4096 links 1 (path: f20771)
+[ 7205.255247] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500015616 mirror 6 root 256 inode 21028 offset 393216 length 4096 links 1 (path: f20771)
+[ 7205.255411] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500060672 mirror 4 root 256 inode 21028 offset 438272 length 4096 links 1 (path: f20771)
+[ 7205.255878] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500027904 mirror 5 root 256 inode 21028 offset 405504 length 4096 links 1 (path: f20771)
+[ 7205.256404] [   T9138] BTRFS warning (device loop8): checksum error at logical 3500089344 mirror 6 root 256 inode 21028 offset 466944 length 4096 links 1 (path: f20771)
+[ 7205.256704] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500109824 mirror 3 root 256 inode 21028 offset 487424 length 4096 links 1 (path: f20771)
+[ 7205.256836] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500113920 mirror 3 root 256 inode 21028 offset 491520 length 4096 links 1 (path: f20771)
+[ 7205.257310] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500032000 mirror 5 root 256 inode 21028 offset 409600 length 4096 links 1 (path: f20771)
+[ 7205.257521] [   T9138] BTRFS warning (device loop8): checksum error at logical 3500097536 mirror 4 root 256 inode 21028 offset 475136 length 4096 links 1 (path: f20771)
+[ 7205.257870] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500077056 mirror 3 root 256 inode 21028 offset 454656 length 4096 links 1 (path: f20771)
+[ 7205.258062] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500081152 mirror 7 root 256 inode 21028 offset 458752 length 4096 links 1 (path: f20771)
+[ 7205.258361] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500101632 mirror 4 root 256 inode 21028 offset 479232 length 4096 links 1 (path: f20771)
+[ 7205.258504] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500122112 mirror 3 root 256 inode 21028 offset 499712 length 4096 links 1 (path: f20771)
+[ 7205.259078] [   T9138] BTRFS warning (device loop8): checksum error at logical 3500040192 mirror 5 root 256 inode 21028 offset 417792 length 4096 links 1 (path: f20771)
+[ 7205.259404] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500064768 mirror 4 root 256 inode 21028 offset 442368 length 4096 links 1 (path: f20771)
+[ 7205.259660] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500044288 mirror 5 root 256 inode 21028 offset 421888 length 4096 links 1 (path: f20771)
+[ 7205.259934] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500036096 mirror 5 root 256 inode 21028 offset 413696 length 4096 links 1 (path: f20771)
+[ 7205.260279] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500118016 mirror 3 root 256 inode 21028 offset 495616 length 4096 links 1 (path: f20771)
+[ 7205.260583] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500130304 mirror 3 root 256 inode 21028 offset 507904 length 4096 links 1 (path: f20771)
+[ 7205.260871] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500068864 mirror 4 root 256 inode 21028 offset 446464 length 4096 links 1 (path: f20771)
+[ 7205.261113] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500048384 mirror 5 root 256 inode 21028 offset 425984 length 4096 links 1 (path: f20771)
+[ 7205.261476] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500134400 mirror 3 root 256 inode 21028 offset 512000 length 4096 links 1 (path: f20771)
+[ 7205.262211] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500105728 mirror 4 root 256 inode 21028 offset 483328 length 4096 links 1 (path: f20771)
+[ 7205.262823] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500052480 mirror 5 root 256 inode 21028 offset 430080 length 4096 links 1 (path: f20771)
+[ 7205.263350] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500142592 mirror 3 root 256 inode 21028 offset 520192 length 4096 links 1 (path: f20771)
+[ 7205.263428] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500126208 mirror 3 root 256 inode 21028 offset 503808 length 4096 links 1 (path: f20771)
+[ 7205.263942] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500072960 mirror 4 root 256 inode 21028 offset 450560 length 4096 links 1 (path: f20771)
+[ 7205.264319] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500019712 mirror 7 root 256 inode 21028 offset 397312 length 4096 links 1 (path: f20771)
+[ 7205.264781] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500093440 mirror 6 root 256 inode 21028 offset 471040 length 4096 links 1 (path: f20771)
+[ 7205.265172] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500138496 mirror 3 root 256 inode 21028 offset 516096 length 4096 links 1 (path: f20771)
+[ 7205.265693] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500023808 mirror 7 root 256 inode 21028 offset 401408 length 4096 links 1 (path: f20771)
+[ 7205.266509] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500085248 mirror 7 root 256 inode 21028 offset 462848 length 4096 links 1 (path: f20771)
+[ 7205.267164] [   T9138] BTRFS warning (device loop8): checksum error at logical 3500060672 mirror 5 root 256 inode 21028 offset 438272 length 4096 links 1 (path: f20771)
+[ 7205.267511] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500027904 mirror 6 root 256 inode 21028 offset 405504 length 4096 links 1 (path: f20771)
+[ 7205.267961] [   T9138] BTRFS warning (device loop8): checksum error at logical 3500089344 mirror 7 root 256 inode 21028 offset 466944 length 4096 links 1 (path: f20771)
+[ 7205.268557] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500109824 mirror 4 root 256 inode 21028 offset 487424 length 4096 links 1 (path: f20771)
+[ 7205.269092] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500113920 mirror 4 root 256 inode 21028 offset 491520 length 4096 links 1 (path: f20771)
+[ 7205.269246] [   T9138] BTRFS warning (device loop8): checksum error at logical 3500056576 mirror 5 root 256 inode 21028 offset 434176 length 4096 links 1 (path: f20771)
+[ 7205.269577] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500097536 mirror 5 root 256 inode 21028 offset 475136 length 4096 links 1 (path: f20771)
+[ 7205.269843] [   T9138] BTRFS warning (device loop8): checksum error at logical 3500077056 mirror 4 root 256 inode 21028 offset 454656 length 4096 links 1 (path: f20771)
+[ 7205.270299] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500081152 mirror 8 root 256 inode 21028 offset 458752 length 4096 links 1 (path: f20771)
+[ 7205.270754] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500122112 mirror 4 root 256 inode 21028 offset 499712 length 4096 links 1 (path: f20771)
+[ 7205.271578] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500015616 mirror 7 root 256 inode 21028 offset 393216 length 4096 links 1 (path: f20771)
+[ 7205.271926] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500040192 mirror 6 root 256 inode 21028 offset 417792 length 4096 links 1 (path: f20771)
+[ 7205.272464] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500044288 mirror 6 root 256 inode 21028 offset 421888 length 4096 links 1 (path: f20771)
+[ 7205.272464] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500064768 mirror 5 root 256 inode 21028 offset 442368 length 4096 links 1 (path: f20771)
+[ 7205.273009] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500036096 mirror 6 root 256 inode 21028 offset 413696 length 4096 links 1 (path: f20771)
+[ 7205.273420] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500118016 mirror 4 root 256 inode 21028 offset 495616 length 4096 links 1 (path: f20771)
+[ 7205.273675] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500130304 mirror 4 root 256 inode 21028 offset 507904 length 4096 links 1 (path: f20771)
+[ 7205.273944] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500068864 mirror 5 root 256 inode 21028 offset 446464 length 4096 links 1 (path: f20771)
+[ 7205.274384] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500048384 mirror 6 root 256 inode 21028 offset 425984 length 4096 links 1 (path: f20771)
+[ 7205.274619] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500134400 mirror 4 root 256 inode 21028 offset 512000 length 4096 links 1 (path: f20771)
+[ 7205.275012] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500105728 mirror 5 root 256 inode 21028 offset 483328 length 4096 links 1 (path: f20771)
+[ 7205.275491] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500052480 mirror 6 root 256 inode 21028 offset 430080 length 4096 links 1 (path: f20771)
+[ 7205.275857] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500142592 mirror 4 root 256 inode 21028 offset 520192 length 4096 links 1 (path: f20771)
+[ 7205.276350] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500126208 mirror 4 root 256 inode 21028 offset 503808 length 4096 links 1 (path: f20771)
+[ 7205.277064] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500019712 mirror 8 root 256 inode 21028 offset 397312 length 4096 links 1 (path: f20771)
+[ 7205.277617] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500072960 mirror 5 root 256 inode 21028 offset 450560 length 4096 links 1 (path: f20771)
+[ 7205.277691] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500093440 mirror 7 root 256 inode 21028 offset 471040 length 4096 links 1 (path: f20771)
+[ 7205.278138] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500138496 mirror 4 root 256 inode 21028 offset 516096 length 4096 links 1 (path: f20771)
+[ 7205.278674] [   T9138] BTRFS warning (device loop8): checksum error at logical 3500032000 mirror 6 root 256 inode 21028 offset 409600 length 4096 links 1 (path: f20771)
+[ 7205.279025] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500085248 mirror 8 root 256 inode 21028 offset 462848 length 4096 links 1 (path: f20771)
+[ 7205.279338] [   T9138] BTRFS warning (device loop8): checksum error at logical 3500060672 mirror 6 root 256 inode 21028 offset 438272 length 4096 links 1 (path: f20771)
+[ 7205.279969] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500101632 mirror 5 root 256 inode 21028 offset 479232 length 4096 links 1 (path: f20771)
+[ 7205.280835] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500089344 mirror 8 root 256 inode 21028 offset 466944 length 4096 links 1 (path: f20771)
+[ 7205.281563] [   T9138] BTRFS warning (device loop8): checksum error at logical 3500023808 mirror 8 root 256 inode 21028 offset 401408 length 4096 links 1 (path: f20771)
+[ 7205.282095] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500056576 mirror 6 root 256 inode 21028 offset 434176 length 4096 links 1 (path: f20771)
+[ 7205.282358] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500113920 mirror 5 root 256 inode 21028 offset 491520 length 4096 links 1 (path: f20771)
+[ 7205.282585] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500027904 mirror 7 root 256 inode 21028 offset 405504 length 4096 links 1 (path: f20771)
+[ 7205.282884] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500077056 mirror 5 root 256 inode 21028 offset 454656 length 4096 links 1 (path: f20771)
+[ 7205.283150] [   T9138] BTRFS warning (device loop8): checksum error at logical 3500109824 mirror 5 root 256 inode 21028 offset 487424 length 4096 links 1 (path: f20771)
+[ 7205.283826] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500097536 mirror 6 root 256 inode 21028 offset 475136 length 4096 links 1 (path: f20771)
+[ 7205.284326] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500040192 mirror 7 root 256 inode 21028 offset 417792 length 4096 links 1 (path: f20771)
+[ 7205.284584] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500122112 mirror 5 root 256 inode 21028 offset 499712 length 4096 links 1 (path: f20771)
+[ 7205.284942] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500044288 mirror 7 root 256 inode 21028 offset 421888 length 4096 links 1 (path: f20771)
+[ 7205.285275] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500036096 mirror 7 root 256 inode 21028 offset 413696 length 4096 links 1 (path: f20771)
+[ 7205.285549] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500015616 mirror 8 root 256 inode 21028 offset 393216 length 4096 links 1 (path: f20771)
+[ 7205.285937] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500118016 mirror 5 root 256 inode 21028 offset 495616 length 4096 links 1 (path: f20771)
+[ 7205.286221] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500068864 mirror 6 root 256 inode 21028 offset 446464 length 4096 links 1 (path: f20771)
+[ 7205.286371] [   T9138] BTRFS warning (device loop8): checksum error at logical 3500064768 mirror 6 root 256 inode 21028 offset 442368 length 4096 links 1 (path: f20771)
+[ 7205.286799] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500134400 mirror 5 root 256 inode 21028 offset 512000 length 4096 links 1 (path: f20771)
+[ 7205.287263] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500105728 mirror 6 root 256 inode 21028 offset 483328 length 4096 links 1 (path: f20771)
+[ 7205.288046] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500052480 mirror 7 root 256 inode 21028 offset 430080 length 4096 links 1 (path: f20771)
+[ 7205.288515] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500142592 mirror 5 root 256 inode 21028 offset 520192 length 4096 links 1 (path: f20771)
+[ 7205.288638] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500130304 mirror 5 root 256 inode 21028 offset 507904 length 4096 links 1 (path: f20771)
+[ 7205.288992] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500048384 mirror 7 root 256 inode 21028 offset 425984 length 4096 links 1 (path: f20771)
+[ 7205.289248] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500072960 mirror 6 root 256 inode 21028 offset 450560 length 4096 links 1 (path: f20771)
+[ 7205.289526] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500093440 mirror 8 root 256 inode 21028 offset 471040 length 4096 links 1 (path: f20771)
+[ 7205.290155] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500032000 mirror 7 root 256 inode 21028 offset 409600 length 4096 links 1 (path: f20771)
+[ 7205.290450] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500126208 mirror 5 root 256 inode 21028 offset 503808 length 4096 links 1 (path: f20771)
+[ 7205.290654] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500060672 mirror 7 root 256 inode 21028 offset 438272 length 4096 links 1 (path: f20771)
+[ 7205.290929] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500101632 mirror 6 root 256 inode 21028 offset 479232 length 4096 links 1 (path: f20771)
+[ 7205.291056] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500138496 mirror 5 root 256 inode 21028 offset 516096 length 4096 links 1 (path: f20771)
+[ 7205.291487] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500113920 mirror 6 root 256 inode 21028 offset 491520 length 4096 links 1 (path: f20771)
+[ 7205.291805] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500027904 mirror 8 root 256 inode 21028 offset 405504 length 4096 links 1 (path: f20771)
+[ 7205.292219] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500109824 mirror 6 root 256 inode 21028 offset 487424 length 4096 links 1 (path: f20771)
+[ 7205.292468] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500056576 mirror 7 root 256 inode 21028 offset 434176 length 4096 links 1 (path: f20771)
+[ 7205.292765] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500040192 mirror 8 root 256 inode 21028 offset 417792 length 4096 links 1 (path: f20771)
+[ 7205.292875] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500077056 mirror 6 root 256 inode 21028 offset 454656 length 4096 links 1 (path: f20771)
+[ 7205.293292] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500044288 mirror 8 root 256 inode 21028 offset 421888 length 4096 links 1 (path: f20771)
+[ 7205.293452] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500036096 mirror 8 root 256 inode 21028 offset 413696 length 4096 links 1 (path: f20771)
+[ 7205.293762] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500097536 mirror 7 root 256 inode 21028 offset 475136 length 4096 links 1 (path: f20771)
+[ 7205.294056] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500118016 mirror 6 root 256 inode 21028 offset 495616 length 4096 links 1 (path: f20771)
+[ 7205.294319] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500068864 mirror 7 root 256 inode 21028 offset 446464 length 4096 links 1 (path: f20771)
+[ 7205.294553] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500122112 mirror 6 root 256 inode 21028 offset 499712 length 4096 links 1 (path: f20771)
+[ 7205.294838] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500064768 mirror 7 root 256 inode 21028 offset 442368 length 4096 links 1 (path: f20771)
+[ 7205.295172] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500105728 mirror 7 root 256 inode 21028 offset 483328 length 4096 links 1 (path: f20771)
+[ 7205.295438] [   T9109] BTRFS warning (device loop8): checksum error at logical 3500134400 mirror 6 root 256 inode 21028 offset 512000 length 4096 links 1 (path: f20771)
+[ 7205.295794] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500130304 mirror 6 root 256 inode 21028 offset 507904 length 4096 links 1 (path: f20771)
+[ 7205.295998] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500048384 mirror 8 root 256 inode 21028 offset 425984 length 4096 links 1 (path: f20771)
+[ 7205.296303] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500072960 mirror 7 root 256 inode 21028 offset 450560 length 4096 links 1 (path: f20771)
+[ 7205.296564] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500052480 mirror 8 root 256 inode 21028 offset 430080 length 4096 links 1 (path: f20771)
+[ 7205.296779] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500032000 mirror 8 root 256 inode 21028 offset 409600 length 4096 links 1 (path: f20771)
+[ 7205.297016] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500142592 mirror 6 root 256 inode 21028 offset 520192 length 4096 links 1 (path: f20771)
+[ 7205.297283] [   T9138] BTRFS warning (device loop8): checksum error at logical 3500060672 mirror 8 root 256 inode 21028 offset 438272 length 4096 links 1 (path: f20771)
+[ 7205.297519] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500101632 mirror 7 root 256 inode 21028 offset 479232 length 4096 links 1 (path: f20771)
+[ 7205.297765] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500138496 mirror 6 root 256 inode 21028 offset 516096 length 4096 links 1 (path: f20771)
+[ 7205.297976] [   T9138] BTRFS warning (device loop8): checksum error at logical 3500109824 mirror 7 root 256 inode 21028 offset 487424 length 4096 links 1 (path: f20771)
+[ 7205.298228] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500126208 mirror 6 root 256 inode 21028 offset 503808 length 4096 links 1 (path: f20771)
+[ 7205.298445] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500077056 mirror 7 root 256 inode 21028 offset 454656 length 4096 links 1 (path: f20771)
+[ 7205.298708] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500113920 mirror 7 root 256 inode 21028 offset 491520 length 4096 links 1 (path: f20771)
+[ 7205.298965] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500097536 mirror 8 root 256 inode 21028 offset 475136 length 4096 links 1 (path: f20771)
+[ 7205.299218] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500118016 mirror 7 root 256 inode 21028 offset 495616 length 4096 links 1 (path: f20771)
+[ 7205.299513] [   T9138] BTRFS warning (device loop8): checksum error at logical 3500068864 mirror 8 root 256 inode 21028 offset 446464 length 4096 links 1 (path: f20771)
+[ 7205.299795] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500056576 mirror 8 root 256 inode 21028 offset 434176 length 4096 links 1 (path: f20771)
+[ 7205.300025] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500064768 mirror 8 root 256 inode 21028 offset 442368 length 4096 links 1 (path: f20771)
+[ 7205.300335] [   T9138] BTRFS warning (device loop8): checksum error at logical 3500105728 mirror 8 root 256 inode 21028 offset 483328 length 4096 links 1 (path: f20771)
+[ 7205.300766] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500134400 mirror 7 root 256 inode 21028 offset 512000 length 4096 links 1 (path: f20771)
+[ 7205.301073] [   T9091] BTRFS warning (device loop8): checksum error at logical 3500072960 mirror 8 root 256 inode 21028 offset 450560 length 4096 links 1 (path: f20771)
+[ 7205.301321] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500122112 mirror 7 root 256 inode 21028 offset 499712 length 4096 links 1 (path: f20771)
+[ 7205.301763] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500142592 mirror 7 root 256 inode 21028 offset 520192 length 4096 links 1 (path: f20771)
+[ 7205.301973] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500101632 mirror 8 root 256 inode 21028 offset 479232 length 4096 links 1 (path: f20771)
+[ 7205.302450] [   T9199] BTRFS warning (device loop8): checksum error at logical 3500130304 mirror 7 root 256 inode 21028 offset 507904 length 4096 links 1 (path: f20771)
+[ 7205.302697] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500109824 mirror 8 root 256 inode 21028 offset 487424 length 4096 links 1 (path: f20771)
+[ 7205.302967] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500126208 mirror 7 root 256 inode 21028 offset 503808 length 4096 links 1 (path: f20771)
+[ 7205.303253] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500077056 mirror 8 root 256 inode 21028 offset 454656 length 4096 links 1 (path: f20771)
+[ 7205.303442] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500118016 mirror 8 root 256 inode 21028 offset 495616 length 4096 links 1 (path: f20771)
+[ 7205.303796] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500138496 mirror 7 root 256 inode 21028 offset 516096 length 4096 links 1 (path: f20771)
+[ 7205.304047] [   T9107] BTRFS warning (device loop8): checksum error at logical 3500113920 mirror 8 root 256 inode 21028 offset 491520 length 4096 links 1 (path: f20771)
+[ 7205.304264] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500134400 mirror 8 root 256 inode 21028 offset 512000 length 4096 links 1 (path: f20771)
+[ 7205.304610] [   T7877] BTRFS warning (device loop8): checksum error at logical 3500122112 mirror 8 root 256 inode 21028 offset 499712 length 4096 links 1 (path: f20771)
+[ 7205.304957] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500130304 mirror 8 root 256 inode 21028 offset 507904 length 4096 links 1 (path: f20771)
+[ 7205.305289] [   T5959] BTRFS warning (device loop8): checksum error at logical 3500126208 mirror 8 root 256 inode 21028 offset 503808 length 4096 links 1 (path: f20771)
+[ 7205.305522] [   T9136] BTRFS warning (device loop8): checksum error at logical 3500142592 mirror 8 root 256 inode 21028 offset 520192 length 4096 links 1 (path: f20771)
+[ 7205.305770] [   T9137] BTRFS warning (device loop8): checksum error at logical 3500138496 mirror 8 root 256 inode 21028 offset 516096 length 4096 links 1 (path: f20771)
+[ 7206.435182] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500015616 mirror 1 root 256 inode 21028 offset 393216 length 4096 links 1 (path: f20771)
+[ 7206.441363] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500015616 mirror 2 root 256 inode 21028 offset 393216 length 4096 links 1 (path: f20771)
+[ 7206.446223] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500015616 mirror 3 root 256 inode 21028 offset 393216 length 4096 links 1 (path: f20771)
+[ 7206.452285] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500015616 mirror 4 root 256 inode 21028 offset 393216 length 4096 links 1 (path: f20771)
+[ 7206.458719] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500015616 mirror 5 root 256 inode 21028 offset 393216 length 4096 links 1 (path: f20771)
+[ 7206.464231] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500015616 mirror 6 root 256 inode 21028 offset 393216 length 4096 links 1 (path: f20771)
+[ 7206.470131] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500015616 mirror 7 root 256 inode 21028 offset 393216 length 4096 links 1 (path: f20771)
+[ 7206.475294] [   T9108] BTRFS warning (device loop8): checksum error at logical 3500015616 mirror 8 root 256 inode 21028 offset 393216 length 4096 links 1 (path: f20771)
+[ 7206.736377] [   T9476] BTRFS info (device loop8): balance: ended with status: -5
+[ 7408.756976] [   T8892] bash (8892): drop_caches: 3
+[ 7411.073820] [   T9034] btrfs_dev_stat_inc_and_print: 23 callbacks suppressed
+[ 7411.073829] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1, gen 0
+[ 7411.073852] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 2335 off 131072 csum 0x8941f998 expected csum 0xa75357f1 mirror 1
+[ 7411.076730] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 2335 off 200704 csum 0x8941f998 expected csum 0xd8390380 mirror 1
+[ 7411.076743] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2, gen 0
+[ 7411.076812] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 2335 off 204800 csum 0x8941f998 expected csum 0xaf02101a mirror 1
+[ 7411.076816] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 3, gen 0
+[ 7411.076854] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 2335 off 208896 csum 0x8941f998 expected csum 0x455b9c54 mirror 1
+[ 7411.076858] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 4, gen 0
+[ 7411.076894] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 2335 off 212992 csum 0x8941f998 expected csum 0x5fa1450a mirror 1
+[ 7411.076897] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 5, gen 0
+[ 7411.076935] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 2335 off 217088 csum 0x8941f998 expected csum 0xf9e5f41b mirror 1
+[ 7411.076938] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 6, gen 0
+[ 7411.076966] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 2335 off 221184 csum 0x8941f998 expected csum 0x43e7cd1f mirror 1
+[ 7411.076970] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 7, gen 0
+[ 7411.076995] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 2335 off 225280 csum 0x8941f998 expected csum 0xa54786e9 mirror 1
+[ 7411.076998] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 8, gen 0
+[ 7411.077516] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 2335 off 229376 csum 0x8941f998 expected csum 0x4fac129b mirror 1
+[ 7411.077524] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 9, gen 0
+[ 7411.077981] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 2335 off 233472 csum 0x8941f998 expected csum 0x84c4dc6f mirror 1
+[ 7411.078398] [   T5992] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 1, gen 0
+[ 7416.074494] [   T9110] btrfs_print_data_csum_error: 9546 callbacks suppressed
+[ 7416.074513] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 2950 off 147456 csum 0x8941f998 expected csum 0x6db14325 mirror 6
+[ 7416.077728] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 2950 off 151552 csum 0x8941f998 expected csum 0x819ba5f0 mirror 6
+[ 7416.078826] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 2950 off 155648 csum 0x8941f998 expected csum 0x25b336db mirror 6
+[ 7416.079785] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 2950 off 159744 csum 0x8941f998 expected csum 0x8e44b247 mirror 6
+[ 7416.081085] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 2950 off 163840 csum 0x8941f998 expected csum 0x15eb974c mirror 6
+[ 7416.082144] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 2950 off 167936 csum 0x8941f998 expected csum 0xb763c37b mirror 6
+[ 7416.083877] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 2950 off 172032 csum 0x8941f998 expected csum 0x8991aaca mirror 6
+[ 7416.084581] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 2950 off 176128 csum 0x8941f998 expected csum 0x23e5d0e6 mirror 6
+[ 7416.085252] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 2950 off 180224 csum 0x8941f998 expected csum 0xef5e9015 mirror 6
+[ 7416.085794] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 2950 off 184320 csum 0x8941f998 expected csum 0x27244487 mirror 6
+[ 7416.123334] [   T9092] btrfs_dev_stat_inc_and_print: 1190 callbacks suppressed
+[ 7416.123343] [   T9092] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 369, gen 0
+[ 7416.130181] [   T9092] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 370, gen 0
+[ 7416.133041] [   T9092] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 371, gen 0
+[ 7416.135942] [   T9092] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 372, gen 0
+[ 7416.138882] [   T9092] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 373, gen 0
+[ 7416.142146] [   T9092] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 374, gen 0
+[ 7416.144956] [   T9092] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 375, gen 0
+[ 7416.147983] [   T9092] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 376, gen 0
+[ 7416.151383] [   T9092] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 377, gen 0
+[ 7416.154525] [   T9092] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 378, gen 0
+[ 7421.075694] [   T9092] btrfs_print_data_csum_error: 10351 callbacks suppressed
+[ 7421.075701] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 3006 off 483328 csum 0x8941f998 expected csum 0xf72a76ef mirror 7
+[ 7421.076094] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 3006 off 421888 csum 0x8941f998 expected csum 0x28c514be mirror 7
+[ 7421.076644] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 3006 off 487424 csum 0x8941f998 expected csum 0x80faefd3 mirror 7
+[ 7421.076826] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 3006 off 425984 csum 0x8941f998 expected csum 0x105a13d3 mirror 7
+[ 7421.077124] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 3006 off 491520 csum 0x8941f998 expected csum 0x19ba6cf7 mirror 7
+[ 7421.077355] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 3006 off 430080 csum 0x8941f998 expected csum 0x14199728 mirror 7
+[ 7421.077763] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 3006 off 495616 csum 0x8941f998 expected csum 0xe0d027a1 mirror 7
+[ 7421.078034] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 3006 off 434176 csum 0x8941f998 expected csum 0xe9f35bb6 mirror 7
+[ 7421.078623] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 3006 off 499712 csum 0x8941f998 expected csum 0xe6661671 mirror 7
+[ 7421.079226] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 3006 off 438272 csum 0x8941f998 expected csum 0xe40f1d70 mirror 7
+[ 7421.240558] [   T9034] btrfs_dev_stat_inc_and_print: 1318 callbacks suppressed
+[ 7421.240572] [   T9034] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 194, gen 0
+[ 7421.240612] [   T5992] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 193, gen 0
+[ 7421.241258] [   T9034] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 195, gen 0
+[ 7421.242097] [   T5992] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 194, gen 0
+[ 7421.242844] [   T9034] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 196, gen 0
+[ 7421.243642] [   T5992] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 195, gen 0
+[ 7421.243686] [   T5992] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 196, gen 0
+[ 7421.243744] [   T5992] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 197, gen 0
+[ 7421.243778] [   T5992] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 198, gen 0
+[ 7421.243818] [   T5992] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 199, gen 0
+[ 7426.078434] [   T5992] btrfs_print_data_csum_error: 9540 callbacks suppressed
+[ 7426.078442] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 3306 off 372736 csum 0x8941f998 expected csum 0xb30f28c3 mirror 2
+[ 7426.079152] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 3306 off 376832 csum 0x8941f998 expected csum 0x920e5b61 mirror 2
+[ 7426.079539] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 3306 off 380928 csum 0x8941f998 expected csum 0x06d1fc52 mirror 2
+[ 7426.079917] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 3306 off 385024 csum 0x8941f998 expected csum 0xe5685d03 mirror 2
+[ 7426.080430] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 3306 off 389120 csum 0x8941f998 expected csum 0x00cd4597 mirror 2
+[ 7426.080985] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 3306 off 327680 csum 0x8941f998 expected csum 0x807d300b mirror 3
+[ 7426.081358] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 3306 off 331776 csum 0x8941f998 expected csum 0x217954fd mirror 3
+[ 7426.083069] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 3306 off 335872 csum 0x8941f998 expected csum 0x37558f15 mirror 3
+[ 7426.083659] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 3306 off 339968 csum 0x8941f998 expected csum 0xab9a10a3 mirror 3
+[ 7426.084109] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 3306 off 344064 csum 0x8941f998 expected csum 0x037e2560 mirror 3
+[ 7426.285154] [   T5992] btrfs_dev_stat_inc_and_print: 1190 callbacks suppressed
+[ 7426.285162] [   T5992] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 737, gen 0
+[ 7426.291721] [   T5992] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 738, gen 0
+[ 7426.294820] [   T5992] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 739, gen 0
+[ 7426.297898] [   T5992] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 740, gen 0
+[ 7426.300779] [   T5992] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 741, gen 0
+[ 7426.303863] [   T5992] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 742, gen 0
+[ 7426.307351] [   T5992] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 743, gen 0
+[ 7426.310233] [   T5992] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 744, gen 0
+[ 7426.313409] [   T5992] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 745, gen 0
+[ 7426.316429] [   T5992] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 746, gen 0
+[ 7431.078684] [   T9110] btrfs_print_data_csum_error: 10399 callbacks suppressed
+[ 7431.078691] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 3448 off 147456 csum 0x8941f998 expected csum 0x7a0add18 mirror 5
+[ 7431.079712] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 3448 off 151552 csum 0x8941f998 expected csum 0x6ffe954f mirror 5
+[ 7431.080145] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 3448 off 155648 csum 0x8941f998 expected csum 0x44dd9366 mirror 5
+[ 7431.081343] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 3448 off 159744 csum 0x8941f998 expected csum 0xd5145619 mirror 5
+[ 7431.081875] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 3448 off 163840 csum 0x8941f998 expected csum 0xd762a76c mirror 5
+[ 7431.083246] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 3448 off 167936 csum 0x8941f998 expected csum 0x8446d7c6 mirror 5
+[ 7431.083974] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 3448 off 176128 csum 0x8941f998 expected csum 0x9ad37450 mirror 5
+[ 7431.084490] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 3448 off 172032 csum 0x8941f998 expected csum 0xae59607e mirror 5
+[ 7431.084893] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 3448 off 180224 csum 0x8941f998 expected csum 0x7d66fb6e mirror 5
+[ 7431.085376] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 3448 off 184320 csum 0x8941f998 expected csum 0xaea86192 mirror 5
+[ 7431.301786] [   T9096] btrfs_dev_stat_inc_and_print: 1302 callbacks suppressed
+[ 7431.301794] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1009, gen 0
+[ 7431.307647] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1010, gen 0
+[ 7431.310766] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1011, gen 0
+[ 7431.313906] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1012, gen 0
+[ 7431.320609] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1013, gen 0
+[ 7431.323975] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1014, gen 0
+[ 7431.334945] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1015, gen 0
+[ 7431.337288] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1016, gen 0
+[ 7431.340728] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1017, gen 0
+[ 7431.343616] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1018, gen 0
+[ 7436.079560] [   T5992] btrfs_print_data_csum_error: 9917 callbacks suppressed
+[ 7436.079572] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 3888 off 417792 csum 0x8941f998 expected csum 0xe5704398 mirror 5
+[ 7436.079968] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 3888 off 479232 csum 0x8941f998 expected csum 0xc58bd48c mirror 5
+[ 7436.080588] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 3888 off 421888 csum 0x8941f998 expected csum 0x5cf2f482 mirror 5
+[ 7436.080920] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 3888 off 483328 csum 0x8941f998 expected csum 0xe87e595c mirror 5
+[ 7436.081438] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 3888 off 425984 csum 0x8941f998 expected csum 0xec898c44 mirror 5
+[ 7436.081940] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 3888 off 487424 csum 0x8941f998 expected csum 0x213d9a56 mirror 5
+[ 7436.082278] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 3888 off 430080 csum 0x8941f998 expected csum 0x8e8d6e6d mirror 5
+[ 7436.082685] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 3888 off 491520 csum 0x8941f998 expected csum 0x2c58b126 mirror 5
+[ 7436.083067] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 3888 off 434176 csum 0x8941f998 expected csum 0xcb906537 mirror 5
+[ 7436.083567] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 3888 off 495616 csum 0x8941f998 expected csum 0x0782f000 mirror 5
+[ 7436.379083] [   T9110] btrfs_dev_stat_inc_and_print: 1254 callbacks suppressed
+[ 7436.379092] [   T9110] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 993, gen 0
+[ 7436.379127] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 1265, gen 0
+[ 7436.379805] [   T9110] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 994, gen 0
+[ 7436.380729] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 1266, gen 0
+[ 7436.381576] [   T9110] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 995, gen 0
+[ 7436.382435] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 1267, gen 0
+[ 7436.383198] [   T9110] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 996, gen 0
+[ 7436.383999] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 1268, gen 0
+[ 7436.386700] [   T9110] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 997, gen 0
+[ 7436.387545] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 1269, gen 0
+[ 7441.080711] [   T5992] btrfs_print_data_csum_error: 9183 callbacks suppressed
+[ 7441.080729] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 4712 off 344064 csum 0x8941f998 expected csum 0x4d37fdb5 mirror 8
+[ 7441.082753] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 4712 off 348160 csum 0x8941f998 expected csum 0x918eedbe mirror 8
+[ 7441.083213] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 4712 off 352256 csum 0x8941f998 expected csum 0xb490d57a mirror 8
+[ 7441.083699] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 4712 off 356352 csum 0x8941f998 expected csum 0xd478010d mirror 8
+[ 7441.085502] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 4712 off 360448 csum 0x8941f998 expected csum 0x316782f3 mirror 8
+[ 7441.085882] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 4712 off 364544 csum 0x8941f998 expected csum 0x42e22137 mirror 8
+[ 7441.086266] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 4712 off 368640 csum 0x8941f998 expected csum 0xaedd4f3a mirror 8
+[ 7441.086694] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 4712 off 372736 csum 0x8941f998 expected csum 0x187b95ef mirror 8
+[ 7441.087055] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 4712 off 376832 csum 0x8941f998 expected csum 0xd2bc62c5 mirror 8
+[ 7441.087638] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 4712 off 380928 csum 0x8941f998 expected csum 0x9fedd13e mirror 8
+[ 7441.415388] [   T9106] btrfs_dev_stat_inc_and_print: 1126 callbacks suppressed
+[ 7441.415396] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1521, gen 0
+[ 7441.421365] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1522, gen 0
+[ 7441.424268] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1523, gen 0
+[ 7441.427015] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1524, gen 0
+[ 7441.431013] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1525, gen 0
+[ 7441.433949] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1526, gen 0
+[ 7441.437256] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1527, gen 0
+[ 7441.440055] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1528, gen 0
+[ 7441.443028] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1529, gen 0
+[ 7441.445918] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 1530, gen 0
+[ 7446.405921] [   T9092] btrfs_print_data_csum_error: 9602 callbacks suppressed
+[ 7446.405931] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 262144 csum 0x8941f998 expected csum 0x870e0114 mirror 1
+[ 7446.407134] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 327680 csum 0x8941f998 expected csum 0xe0b0c111 mirror 1
+[ 7446.407251] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 393216 csum 0x8941f998 expected csum 0x7d9ca0c9 mirror 1
+[ 7446.407308] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 458752 csum 0x8941f998 expected csum 0x0e7c678c mirror 1
+[ 7446.407318] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 397312 csum 0x8941f998 expected csum 0xb7d19f4a mirror 1
+[ 7446.407349] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 401408 csum 0x8941f998 expected csum 0x7adf2b44 mirror 1
+[ 7446.407380] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 405504 csum 0x8941f998 expected csum 0xd67e5090 mirror 1
+[ 7446.407393] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 462848 csum 0x8941f998 expected csum 0xdb5ba34d mirror 1
+[ 7446.407411] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 409600 csum 0x8941f998 expected csum 0xfee263e7 mirror 1
+[ 7446.407430] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 466944 csum 0x8941f998 expected csum 0xd34261c4 mirror 1
+[ 7446.451463] [   T9111] btrfs_dev_stat_inc_and_print: 1174 callbacks suppressed
+[ 7446.451469] [   T9111] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 273, gen 0
+[ 7446.456449] [   T9111] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 274, gen 0
+[ 7446.459686] [   T9111] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 275, gen 0
+[ 7446.462812] [   T9111] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 276, gen 0
+[ 7446.469323] [   T9111] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 277, gen 0
+[ 7446.472435] [   T9111] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 278, gen 0
+[ 7446.475877] [   T9111] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 279, gen 0
+[ 7446.479355] [   T9111] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 280, gen 0
+[ 7446.484472] [   T9111] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 281, gen 0
+[ 7446.487345] [   T9111] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 282, gen 0
+[ 7451.406623] [   T9034] btrfs_print_data_csum_error: 10536 callbacks suppressed
+[ 7451.406635] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 466944 csum 0x8941f998 expected csum 0xd34261c4 mirror 2
+[ 7451.406961] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 471040 csum 0x8941f998 expected csum 0x4287863a mirror 2
+[ 7451.407264] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 475136 csum 0x8941f998 expected csum 0x6010db8a mirror 2
+[ 7451.407673] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 479232 csum 0x8941f998 expected csum 0x6b33f397 mirror 2
+[ 7451.408095] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 483328 csum 0x8941f998 expected csum 0x970a2027 mirror 2
+[ 7451.408867] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 487424 csum 0x8941f998 expected csum 0x9e3a0347 mirror 2
+[ 7451.409172] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 491520 csum 0x8941f998 expected csum 0x41ae8bef mirror 2
+[ 7451.409863] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 495616 csum 0x8941f998 expected csum 0x0bdf7e57 mirror 2
+[ 7451.410974] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 499712 csum 0x8941f998 expected csum 0x68ef1386 mirror 2
+[ 7451.413669] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 5346 off 503808 csum 0x8941f998 expected csum 0x32c4b355 mirror 2
+[ 7451.529760] [   T9111] btrfs_dev_stat_inc_and_print: 1286 callbacks suppressed
+[ 7451.529768] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 945, gen 0
+[ 7451.529775] [   T9112] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 673, gen 0
+[ 7451.530419] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 946, gen 0
+[ 7451.531216] [   T9112] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 674, gen 0
+[ 7451.532061] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 947, gen 0
+[ 7451.532853] [   T9112] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 675, gen 0
+[ 7451.533433] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 948, gen 0
+[ 7451.534226] [   T9112] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 676, gen 0
+[ 7451.535156] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 949, gen 0
+[ 7451.535791] [   T9112] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 677, gen 0
+[ 7456.407897] [   T9116] btrfs_print_data_csum_error: 6127 callbacks suppressed
+[ 7456.407906] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 7588 off 208896 csum 0x8941f998 expected csum 0xa5ffff14 mirror 4
+[ 7456.408490] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 7588 off 212992 csum 0x8941f998 expected csum 0xf46bf225 mirror 4
+[ 7456.408667] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 7588 off 217088 csum 0x8941f998 expected csum 0x7ec554f9 mirror 4
+[ 7456.408975] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 7588 off 221184 csum 0x8941f998 expected csum 0xea74a209 mirror 4
+[ 7456.409470] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 7588 off 225280 csum 0x8941f998 expected csum 0x0f62f00e mirror 4
+[ 7456.409785] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 7588 off 229376 csum 0x8941f998 expected csum 0xa30a65d5 mirror 4
+[ 7456.410431] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 7588 off 233472 csum 0x8941f998 expected csum 0x320f909e mirror 4
+[ 7456.411001] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 7588 off 237568 csum 0x8941f998 expected csum 0xffcc1c71 mirror 4
+[ 7456.411498] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 7588 off 241664 csum 0x8941f998 expected csum 0x1d45f7ba mirror 4
+[ 7456.412326] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 7588 off 245760 csum 0x8941f998 expected csum 0x55abad4a mirror 4
+[ 7456.582379] [   T9116] btrfs_dev_stat_inc_and_print: 773 callbacks suppressed
+[ 7456.582388] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1057, gen 0
+[ 7456.587738] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1058, gen 0
+[ 7456.590803] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1059, gen 0
+[ 7456.594555] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1060, gen 0
+[ 7456.597703] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1061, gen 0
+[ 7456.601026] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1062, gen 0
+[ 7456.604389] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1063, gen 0
+[ 7456.607622] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1064, gen 0
+[ 7456.610699] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1065, gen 0
+[ 7456.613837] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1066, gen 0
+[ 7461.408809] [   T9092] btrfs_print_data_csum_error: 7132 callbacks suppressed
+[ 7461.408816] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 9690 off 479232 csum 0x8941f998 expected csum 0x6ae5ed51 mirror 2
+[ 7461.409494] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 9690 off 409600 csum 0x8941f998 expected csum 0xb34df1c8 mirror 2
+[ 7461.409834] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 9690 off 483328 csum 0x8941f998 expected csum 0x0aeb09c7 mirror 2
+[ 7461.410269] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 9690 off 413696 csum 0x8941f998 expected csum 0xd1280f39 mirror 2
+[ 7461.411137] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 9690 off 487424 csum 0x8941f998 expected csum 0xc1efdc20 mirror 2
+[ 7461.411866] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 9690 off 417792 csum 0x8941f998 expected csum 0xecb6da90 mirror 2
+[ 7461.412695] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 9690 off 491520 csum 0x8941f998 expected csum 0xaa6be109 mirror 2
+[ 7461.413098] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 9690 off 421888 csum 0x8941f998 expected csum 0x3d04eed5 mirror 2
+[ 7461.413775] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 9690 off 495616 csum 0x8941f998 expected csum 0xa1e36f87 mirror 2
+[ 7461.413819] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 9690 off 425984 csum 0x8941f998 expected csum 0x6a5eec23 mirror 2
+[ 7461.620957] [   T5992] btrfs_dev_stat_inc_and_print: 900 callbacks suppressed
+[ 7461.620967] [   T5992] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2034, gen 0
+[ 7461.621018] [   T9034] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 2496, gen 0
+[ 7461.622572] [   T5992] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2035, gen 0
+[ 7461.624054] [   T9034] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 2497, gen 0
+[ 7461.624918] [   T5992] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2036, gen 0
+[ 7461.625916] [   T9034] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 2498, gen 0
+[ 7461.626487] [   T5992] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2037, gen 0
+[ 7461.627327] [   T9034] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 2499, gen 0
+[ 7461.628097] [   T5992] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2038, gen 0
+[ 7461.628947] [   T9034] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 2500, gen 0
+[ 7466.410619] [   T9116] btrfs_print_data_csum_error: 9889 callbacks suppressed
+[ 7466.411353] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 10230 off 147456 csum 0x8941f998 expected csum 0xd4d198f1 mirror 6
+[ 7466.412732] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 10230 off 151552 csum 0x8941f998 expected csum 0xcdac5e1f mirror 6
+[ 7466.413404] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 10230 off 155648 csum 0x8941f998 expected csum 0xadab1d37 mirror 6
+[ 7466.413876] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 10230 off 159744 csum 0x8941f998 expected csum 0x449bc4ae mirror 6
+[ 7466.414310] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 10230 off 163840 csum 0x8941f998 expected csum 0x200a87b9 mirror 6
+[ 7466.414809] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 10230 off 167936 csum 0x8941f998 expected csum 0xf1ee4956 mirror 6
+[ 7466.415158] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 10230 off 172032 csum 0x8941f998 expected csum 0x1f5ae2a1 mirror 6
+[ 7466.415487] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 10230 off 176128 csum 0x8941f998 expected csum 0x5fa19322 mirror 6
+[ 7466.415868] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 10230 off 180224 csum 0x8941f998 expected csum 0xc7a374a0 mirror 6
+[ 7466.416230] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 10230 off 184320 csum 0x8941f998 expected csum 0xa6d210a7 mirror 6
+[ 7466.633998] [   T7877] btrfs_dev_stat_inc_and_print: 1222 callbacks suppressed
+[ 7466.634006] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2546, gen 0
+[ 7466.639496] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2547, gen 0
+[ 7466.643990] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2548, gen 0
+[ 7466.648836] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2549, gen 0
+[ 7466.653297] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2550, gen 0
+[ 7466.657355] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2551, gen 0
+[ 7466.661369] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2552, gen 0
+[ 7466.664476] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2553, gen 0
+[ 7466.668082] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2554, gen 0
+[ 7466.671261] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2555, gen 0
+[ 7471.410820] [   T5992] btrfs_print_data_csum_error: 9365 callbacks suppressed
+[ 7471.410828] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 11016 off 487424 csum 0x8941f998 expected csum 0xf25c9749 mirror 4
+[ 7471.411082] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 11016 off 442368 csum 0x8941f998 expected csum 0x25992308 mirror 4
+[ 7471.411662] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 11016 off 446464 csum 0x8941f998 expected csum 0xfcb6cdc7 mirror 4
+[ 7471.412113] [   T9110] BTRFS warning (device loop8): csum failed root 256 ino 11016 off 491520 csum 0x8941f998 expected csum 0x79d6a89f mirror 4
+[ 7471.412797] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 11016 off 450560 csum 0x8941f998 expected csum 0xec6727bd mirror 4
+[ 7471.413011] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 11016 off 495616 csum 0x8941f998 expected csum 0x3d77c858 mirror 4
+[ 7471.413386] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 11016 off 454656 csum 0x8941f998 expected csum 0x477ef6e5 mirror 4
+[ 7471.413921] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 11016 off 499712 csum 0x8941f998 expected csum 0x37fdd0e6 mirror 4
+[ 7471.414300] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 11016 off 503808 csum 0x8941f998 expected csum 0x456488ad mirror 4
+[ 7471.414857] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 11016 off 507904 csum 0x8941f998 expected csum 0xc78d4079 mirror 4
+[ 7471.758093] [   T9112] btrfs_dev_stat_inc_and_print: 1190 callbacks suppressed
+[ 7471.758102] [   T9112] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2978, gen 0
+[ 7471.758115] [   T9106] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 3168, gen 0
+[ 7471.758622] [   T9112] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2979, gen 0
+[ 7471.759423] [   T9106] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 3169, gen 0
+[ 7471.760857] [   T9112] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2980, gen 0
+[ 7471.760945] [   T9106] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 3170, gen 0
+[ 7471.762537] [   T9112] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2981, gen 0
+[ 7471.763902] [   T9106] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 3171, gen 0
+[ 7471.764819] [   T9112] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 2982, gen 0
+[ 7471.765624] [   T9106] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 3172, gen 0
+[ 7476.411694] [   T9034] btrfs_print_data_csum_error: 8729 callbacks suppressed
+[ 7476.411703] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 11848 off 221184 csum 0x8941f998 expected csum 0xc0757a34 mirror 8
+[ 7476.412231] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 11848 off 225280 csum 0x8941f998 expected csum 0xf8a3672a mirror 8
+[ 7476.412752] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 11848 off 229376 csum 0x8941f998 expected csum 0x1c112951 mirror 8
+[ 7476.413036] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 11848 off 233472 csum 0x8941f998 expected csum 0xe5d6f919 mirror 8
+[ 7476.413372] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 11848 off 237568 csum 0x8941f998 expected csum 0x03f5cd28 mirror 8
+[ 7476.414868] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 11848 off 241664 csum 0x8941f998 expected csum 0xf3e3027f mirror 8
+[ 7476.415295] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 11848 off 245760 csum 0x8941f998 expected csum 0x5ceb8e56 mirror 8
+[ 7476.415705] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 11848 off 249856 csum 0x8941f998 expected csum 0x842e034e mirror 8
+[ 7476.416117] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 11848 off 253952 csum 0x8941f998 expected csum 0x8d814045 mirror 8
+[ 7476.416408] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 11848 off 258048 csum 0x8941f998 expected csum 0x02bcd024 mirror 8
+[ 7476.807450] [   T9034] btrfs_dev_stat_inc_and_print: 1082 callbacks suppressed
+[ 7476.807458] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1297, gen 0
+[ 7476.813139] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1298, gen 0
+[ 7476.816608] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1299, gen 0
+[ 7476.819616] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1300, gen 0
+[ 7476.822697] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1301, gen 0
+[ 7476.826388] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1302, gen 0
+[ 7476.831383] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1303, gen 0
+[ 7476.835050] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1304, gen 0
+[ 7476.838817] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1305, gen 0
+[ 7476.842450] [   T9034] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1306, gen 0
+[ 7481.508091] [   T9096] btrfs_print_data_csum_error: 7536 callbacks suppressed
+[ 7481.508099] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 13546 off 131072 csum 0x8941f998 expected csum 0x89b21774 mirror 1
+[ 7481.508100] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 13546 off 196608 csum 0x8941f998 expected csum 0x7fd95526 mirror 1
+[ 7481.508808] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 13546 off 135168 csum 0x8941f998 expected csum 0x6b0bc85d mirror 1
+[ 7481.509737] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 13546 off 200704 csum 0x8941f998 expected csum 0x24a82f04 mirror 1
+[ 7481.510345] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 13546 off 131072 csum 0x8941f998 expected csum 0x89b21774 mirror 2
+[ 7481.510554] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 13546 off 139264 csum 0x8941f998 expected csum 0xc4fa2521 mirror 1
+[ 7481.511818] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 13546 off 204800 csum 0x8941f998 expected csum 0x4e4ebeb0 mirror 1
+[ 7481.512626] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 13546 off 196608 csum 0x8941f998 expected csum 0x7fd95526 mirror 2
+[ 7481.513072] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 13546 off 131072 csum 0x8941f998 expected csum 0x89b21774 mirror 3
+[ 7481.513425] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 13546 off 135168 csum 0x8941f998 expected csum 0x6b0bc85d mirror 2
+[ 7481.844009] [   T9111] btrfs_dev_stat_inc_and_print: 932 callbacks suppressed
+[ 7481.844017] [   T9111] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 2104, gen 0
+[ 7481.851068] [   T9111] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 2105, gen 0
+[ 7481.854238] [   T9111] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 2106, gen 0
+[ 7481.857506] [   T9111] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 2107, gen 0
+[ 7481.860576] [   T9111] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 2108, gen 0
+[ 7481.863629] [   T9111] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 2109, gen 0
+[ 7481.868802] [   T9111] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 2110, gen 0
+[ 7481.872461] [   T9111] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 2111, gen 0
+[ 7481.876210] [   T9111] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 2112, gen 0
+[ 7481.879091] [   T9111] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 2113, gen 0
+[ 7486.509089] [   T7877] btrfs_print_data_csum_error: 5203 callbacks suppressed
+[ 7486.509097] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 507904 csum 0x8941f998 expected csum 0xe97bc1f6 mirror 4
+[ 7486.509589] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 438272 csum 0x8941f998 expected csum 0x36ae603a mirror 4
+[ 7486.513731] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 512000 csum 0x8941f998 expected csum 0xebf80d55 mirror 4
+[ 7486.514338] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 376832 csum 0x8941f998 expected csum 0xfd50655b mirror 4
+[ 7486.517365] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 442368 csum 0x8941f998 expected csum 0xf310b076 mirror 4
+[ 7486.520257] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 380928 csum 0x8941f998 expected csum 0xf3efb6fc mirror 4
+[ 7486.520792] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 516096 csum 0x8941f998 expected csum 0x93ec3708 mirror 4
+[ 7486.521135] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 446464 csum 0x8941f998 expected csum 0x62688670 mirror 4
+[ 7486.522764] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 385024 csum 0x8941f998 expected csum 0x5503c72e mirror 4
+[ 7486.523062] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 520192 csum 0x8941f998 expected csum 0x09f7ebe2 mirror 4
+[ 7486.865435] [   T9116] btrfs_dev_stat_inc_and_print: 643 callbacks suppressed
+[ 7486.865443] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1774, gen 0
+[ 7486.870283] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1775, gen 0
+[ 7486.873941] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1776, gen 0
+[ 7486.877719] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1777, gen 0
+[ 7486.880865] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1778, gen 0
+[ 7486.884081] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1779, gen 0
+[ 7486.887153] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1780, gen 0
+[ 7486.890737] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1781, gen 0
+[ 7486.894007] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1782, gen 0
+[ 7486.897467] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 1783, gen 0
+[ 7491.512313] [   T9106] btrfs_print_data_csum_error: 9253 callbacks suppressed
+[ 7491.512322] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 401408 csum 0x8941f998 expected csum 0x33fd3e13 mirror 2
+[ 7491.512657] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 466944 csum 0x8941f998 expected csum 0xa0aa6864 mirror 2
+[ 7491.513033] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 405504 csum 0x8941f998 expected csum 0xc5d8a6e1 mirror 2
+[ 7491.513383] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 471040 csum 0x8941f998 expected csum 0x23137b75 mirror 2
+[ 7491.513884] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 409600 csum 0x8941f998 expected csum 0x354c3d85 mirror 2
+[ 7491.514300] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 475136 csum 0x8941f998 expected csum 0x271b4f9f mirror 2
+[ 7491.514662] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 413696 csum 0x8941f998 expected csum 0x377c9fde mirror 2
+[ 7491.514977] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 479232 csum 0x8941f998 expected csum 0x1f1d21e0 mirror 2
+[ 7491.515396] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 417792 csum 0x8941f998 expected csum 0x4dc459d4 mirror 2
+[ 7491.515749] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 15688 off 483328 csum 0x8941f998 expected csum 0x2f9abb4a mirror 2
+[ 7491.873912] [   T9111] btrfs_dev_stat_inc_and_print: 1158 callbacks suppressed
+[ 7491.873922] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 1481, gen 0
+[ 7491.873928] [   T7877] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 1169, gen 0
+[ 7491.874587] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 1482, gen 0
+[ 7491.875319] [   T7877] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 1170, gen 0
+[ 7491.876116] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 1483, gen 0
+[ 7491.876830] [   T7877] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 1171, gen 0
+[ 7491.877626] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 1484, gen 0
+[ 7491.878421] [   T7877] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 1172, gen 0
+[ 7491.879297] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 1485, gen 0
+[ 7491.880299] [   T7877] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 1173, gen 0
+[ 7497.265667] [   T9034] btrfs_print_data_csum_error: 7634 callbacks suppressed
+[ 7497.265676] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 262144 csum 0x8941f998 expected csum 0x8906e791 mirror 1
+[ 7497.266227] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 327680 csum 0x8941f998 expected csum 0x2b615c94 mirror 1
+[ 7497.266237] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 393216 csum 0x8941f998 expected csum 0xe121ef17 mirror 1
+[ 7497.266252] [   T7877] btrfs_dev_stat_inc_and_print: 854 callbacks suppressed
+[ 7497.266255] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 3634, gen 0
+[ 7497.266257] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 458752 csum 0x8941f998 expected csum 0x60650029 mirror 1
+[ 7497.266265] [   T9111] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 3744, gen 0
+[ 7497.266327] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 397312 csum 0x8941f998 expected csum 0x18f37273 mirror 1
+[ 7497.266333] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 3635, gen 0
+[ 7497.266382] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 462848 csum 0x8941f998 expected csum 0x00e2605a mirror 1
+[ 7497.266385] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 401408 csum 0x8941f998 expected csum 0x0ed747f3 mirror 1
+[ 7497.266389] [   T9111] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 3745, gen 0
+[ 7497.266391] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 3636, gen 0
+[ 7497.266428] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 405504 csum 0x8941f998 expected csum 0x314e2c74 mirror 1
+[ 7497.266430] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 466944 csum 0x8941f998 expected csum 0x19cf0be8 mirror 1
+[ 7497.266440] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 3637, gen 0
+[ 7497.266441] [   T9111] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 3746, gen 0
+[ 7497.266481] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 409600 csum 0x8941f998 expected csum 0xcef8fd0e mirror 1
+[ 7497.266484] [   T9111] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 3747, gen 0
+[ 7497.266487] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 3638, gen 0
+[ 7497.266523] [   T9111] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 3748, gen 0
+[ 7502.265862] [   T9116] btrfs_print_data_csum_error: 10728 callbacks suppressed
+[ 7502.265869] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 466944 csum 0x8941f998 expected csum 0x19cf0be8 mirror 8
+[ 7502.266436] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 471040 csum 0x8941f998 expected csum 0xfbc91f52 mirror 8
+[ 7502.266768] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 475136 csum 0x8941f998 expected csum 0xe3205307 mirror 8
+[ 7502.267689] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 479232 csum 0x8941f998 expected csum 0x19df3dce mirror 8
+[ 7502.268366] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 487424 csum 0x8941f998 expected csum 0x7cec4391 mirror 8
+[ 7502.268793] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 483328 csum 0x8941f998 expected csum 0xcef1c456 mirror 8
+[ 7502.269516] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 491520 csum 0x8941f998 expected csum 0xc2959c08 mirror 8
+[ 7502.270625] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 495616 csum 0x8941f998 expected csum 0x80879e64 mirror 8
+[ 7502.271530] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 499712 csum 0x8941f998 expected csum 0xd038320f mirror 8
+[ 7502.272090] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 17737 off 503808 csum 0x8941f998 expected csum 0xdeb237ae mirror 8
+[ 7502.305853] [   T9034] btrfs_dev_stat_inc_and_print: 1334 callbacks suppressed
+[ 7502.305855] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 4144, gen 0
+[ 7502.305859] [   T9034] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 4034, gen 0
+[ 7502.305925] [   T9034] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 4035, gen 0
+[ 7502.306471] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 4145, gen 0
+[ 7502.307351] [   T9034] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 4036, gen 0
+[ 7502.308825] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 4146, gen 0
+[ 7502.309578] [   T9034] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 4037, gen 0
+[ 7502.310302] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 4147, gen 0
+[ 7502.311054] [   T9034] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 4038, gen 0
+[ 7502.311852] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 4148, gen 0
+[ 7507.266871] [   T9034] btrfs_print_data_csum_error: 9315 callbacks suppressed
+[ 7507.266879] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 18169 off 454656 csum 0x8941f998 expected csum 0xd86577e4 mirror 3
+[ 7507.267280] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 18169 off 393216 csum 0x8941f998 expected csum 0x02f3e809 mirror 4
+[ 7507.267712] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 18169 off 458752 csum 0x8941f998 expected csum 0x684ca01d mirror 4
+[ 7507.269227] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 18169 off 397312 csum 0x8941f998 expected csum 0xb7670b92 mirror 4
+[ 7507.269540] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 18169 off 462848 csum 0x8941f998 expected csum 0x21e55079 mirror 4
+[ 7507.270311] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 18169 off 401408 csum 0x8941f998 expected csum 0xe25c211f mirror 4
+[ 7507.270925] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 18169 off 466944 csum 0x8941f998 expected csum 0x5c344ec4 mirror 4
+[ 7507.271544] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 18169 off 405504 csum 0x8941f998 expected csum 0xfb588b20 mirror 4
+[ 7507.271977] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 18169 off 471040 csum 0x8941f998 expected csum 0x4c02182b mirror 4
+[ 7507.272637] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 18169 off 409600 csum 0x8941f998 expected csum 0xc1a1ffe8 mirror 4
+[ 7507.359073] [   T9116] btrfs_dev_stat_inc_and_print: 1174 callbacks suppressed
+[ 7507.359078] [   T9034] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 3538, gen 0
+[ 7507.359081] [   T9116] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 2776, gen 0
+[ 7507.359155] [   T9116] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 2777, gen 0
+[ 7507.359621] [   T9034] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 3539, gen 0
+[ 7507.360333] [   T9116] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 2778, gen 0
+[ 7507.361196] [   T9034] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 3540, gen 0
+[ 7507.361970] [   T9116] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 2779, gen 0
+[ 7507.362818] [   T9034] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 3541, gen 0
+[ 7507.363570] [   T9116] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 2780, gen 0
+[ 7507.364473] [   T9034] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 3542, gen 0
+[ 7512.270890] [   T9112] btrfs_print_data_csum_error: 9966 callbacks suppressed
+[ 7512.270901] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 18358 off 405504 csum 0x8941f998 expected csum 0x749d1885 mirror 4
+[ 7512.272060] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 18358 off 475136 csum 0x8941f998 expected csum 0xa5abcca1 mirror 4
+[ 7512.272538] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 18358 off 409600 csum 0x8941f998 expected csum 0xae09d90e mirror 4
+[ 7512.273410] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 18358 off 479232 csum 0x8941f998 expected csum 0x8cb72952 mirror 4
+[ 7512.273725] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 18358 off 413696 csum 0x8941f998 expected csum 0x02a5553c mirror 4
+[ 7512.274295] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 18358 off 483328 csum 0x8941f998 expected csum 0x88c41cbc mirror 4
+[ 7512.275757] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 18358 off 417792 csum 0x8941f998 expected csum 0x78721dab mirror 4
+[ 7512.278010] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 18358 off 487424 csum 0x8941f998 expected csum 0x4d9dd709 mirror 4
+[ 7512.278361] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 18358 off 421888 csum 0x8941f998 expected csum 0xb8b8fb16 mirror 4
+[ 7512.278722] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 18358 off 491520 csum 0x8941f998 expected csum 0xfa35bf91 mirror 4
+[ 7512.476402] [   T7877] btrfs_dev_stat_inc_and_print: 1268 callbacks suppressed
+[ 7512.476411] [   T7877] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 1137, gen 0
+[ 7512.476450] [   T9112] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 1961, gen 0
+[ 7512.477130] [   T7877] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 1138, gen 0
+[ 7512.477934] [   T9112] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 1962, gen 0
+[ 7512.478750] [   T7877] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 1139, gen 0
+[ 7512.480181] [   T9112] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 1963, gen 0
+[ 7512.481359] [   T7877] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 1140, gen 0
+[ 7512.482169] [   T9112] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 1964, gen 0
+[ 7512.482866] [   T7877] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 1141, gen 0
+[ 7512.482903] [   T7877] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 1142, gen 0
+[ 7517.272352] [   T5992] btrfs_print_data_csum_error: 9328 callbacks suppressed
+[ 7517.272361] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 266240 csum 0x8941f998 expected csum 0xf229e2ef mirror 7
+[ 7517.272525] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 270336 csum 0x8941f998 expected csum 0xbe0fa183 mirror 7
+[ 7517.272948] [   T9096] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 274432 csum 0x8941f998 expected csum 0xb5875a97 mirror 7
+[ 7517.273558] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 278528 csum 0x8941f998 expected csum 0xcb4f9755 mirror 7
+[ 7517.274039] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 282624 csum 0x8941f998 expected csum 0xfae069b2 mirror 7
+[ 7517.274660] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 286720 csum 0x8941f998 expected csum 0xdc481814 mirror 7
+[ 7517.275143] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 290816 csum 0x8941f998 expected csum 0x75dbc08d mirror 7
+[ 7517.277036] [   T9119] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 294912 csum 0x8941f998 expected csum 0xfd4331dd mirror 7
+[ 7517.277690] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 299008 csum 0x8941f998 expected csum 0x847bf698 mirror 7
+[ 7517.278119] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 303104 csum 0x8941f998 expected csum 0xa94df5a3 mirror 7
+[ 7517.507702] [   T9116] btrfs_dev_stat_inc_and_print: 1158 callbacks suppressed
+[ 7517.507710] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 2601, gen 0
+[ 7517.512905] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 2602, gen 0
+[ 7517.515671] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 2603, gen 0
+[ 7517.519009] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 2604, gen 0
+[ 7517.522125] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 2605, gen 0
+[ 7517.527557] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 2606, gen 0
+[ 7517.530772] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 2607, gen 0
+[ 7517.534244] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 2608, gen 0
+[ 7517.538602] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 2609, gen 0
+[ 7517.549013] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 2610, gen 0
+[ 7522.272879] [   T9111] btrfs_print_data_csum_error: 10493 callbacks suppressed
+[ 7522.272888] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 466944 csum 0x8941f998 expected csum 0xa3a4614f mirror 8
+[ 7522.273484] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 417792 csum 0x8941f998 expected csum 0x4dd823d5 mirror 8
+[ 7522.273912] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 471040 csum 0x8941f998 expected csum 0x087670e0 mirror 8
+[ 7522.275519] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 421888 csum 0x8941f998 expected csum 0x30b0d7f8 mirror 8
+[ 7522.276358] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 475136 csum 0x8941f998 expected csum 0xf76d5dc6 mirror 8
+[ 7522.276764] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 425984 csum 0x8941f998 expected csum 0xd19c306a mirror 8
+[ 7522.277343] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 479232 csum 0x8941f998 expected csum 0x6c96b310 mirror 8
+[ 7522.277690] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 430080 csum 0x8941f998 expected csum 0x8c52ee71 mirror 8
+[ 7522.278035] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 483328 csum 0x8941f998 expected csum 0x189d774b mirror 8
+[ 7522.278432] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 18598 off 434176 csum 0x8941f998 expected csum 0x09c41b6a mirror 8
+[ 7522.547241] [   T9092] btrfs_dev_stat_inc_and_print: 1318 callbacks suppressed
+[ 7522.547248] [   T9092] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3846, gen 0
+[ 7522.547301] [   T9034] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 4370, gen 0
+[ 7522.547904] [   T9092] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3847, gen 0
+[ 7522.548462] [   T9034] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 4371, gen 0
+[ 7522.549323] [   T9092] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3848, gen 0
+[ 7522.549364] [   T9092] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3849, gen 0
+[ 7522.549395] [   T9092] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3850, gen 0
+[ 7522.549428] [   T9092] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3851, gen 0
+[ 7522.549459] [   T9092] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3852, gen 0
+[ 7522.549505] [   T9092] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3853, gen 0
+[ 7527.274071] [   T9106] btrfs_print_data_csum_error: 5957 callbacks suppressed
+[ 7527.274079] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 21028 off 487424 csum 0x8941f998 expected csum 0xaaad739e mirror 2
+[ 7527.276327] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 21028 off 491520 csum 0x8941f998 expected csum 0x37f49049 mirror 2
+[ 7527.276881] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 21028 off 495616 csum 0x8941f998 expected csum 0xdfc5059d mirror 2
+[ 7527.277170] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 21028 off 499712 csum 0x8941f998 expected csum 0x177cfc73 mirror 2
+[ 7527.277918] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 21028 off 507904 csum 0x8941f998 expected csum 0xeadf2cb5 mirror 2
+[ 7527.278248] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 21028 off 512000 csum 0x8941f998 expected csum 0x7029e698 mirror 2
+[ 7527.278264] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 21028 off 503808 csum 0x8941f998 expected csum 0x874cd6aa mirror 2
+[ 7527.279168] [   T5992] BTRFS warning (device loop8): csum failed root 256 ino 21028 off 516096 csum 0x8941f998 expected csum 0x15206866 mirror 2
+[ 7527.280034] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 21028 off 520192 csum 0x8941f998 expected csum 0x11ab4b60 mirror 2
+[ 7527.280858] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 21028 off 393216 csum 0x8941f998 expected csum 0xf9aa6b56 mirror 3
+[ 7527.601853] [   T9119] btrfs_dev_stat_inc_and_print: 758 callbacks suppressed
+[ 7527.601860] [   T9119] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3958, gen 0
+[ 7527.601863] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 4482, gen 0
+[ 7527.602378] [   T9119] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3959, gen 0
+[ 7527.602401] [   T9119] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3960, gen 0
+[ 7527.602424] [   T9119] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3961, gen 0
+[ 7527.602466] [   T9119] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3962, gen 0
+[ 7527.602488] [   T9119] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3963, gen 0
+[ 7527.602524] [   T9119] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3964, gen 0
+[ 7527.602554] [   T9119] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3965, gen 0
+[ 7527.602613] [   T9119] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 3966, gen 0
+[ 7536.242684] [   T7877] btrfs_print_data_csum_error: 7871 callbacks suppressed
+[ 7536.242693] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 27301 off 61440 csum 0x8941f998 expected csum 0x8fe2f086 mirror 1
+[ 7536.242695] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 27301 off 126976 csum 0x8941f998 expected csum 0xb239fced mirror 1
+[ 7536.242705] [   T9092] btrfs_dev_stat_inc_and_print: 886 callbacks suppressed
+[ 7536.242705] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 27301 off 81920 csum 0x8941f998 expected csum 0xe362e5dd mirror 1
+[ 7536.242706] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 27301 off 258048 csum 0x8941f998 expected csum 0x18e4e68c mirror 1
+[ 7536.242707] [   T9092] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 2145, gen 0
+[ 7536.242716] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 2985, gen 0
+[ 7536.242761] [   T9119] BTRFS warning (device loop8): csum failed root 256 ino 27301 off 192512 csum 0x8941f998 expected csum 0x43fa2ee4 mirror 1
+[ 7536.242778] [   T9119] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 4272, gen 0
+[ 7536.242793] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 27301 off 131072 csum 0x8941f998 expected csum 0x4f2fa754 mirror 1
+[ 7536.242795] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 27301 off 86016 csum 0x8941f998 expected csum 0x7485397c mirror 1
+[ 7536.242798] [   T9092] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 2146, gen 0
+[ 7536.242801] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 2986, gen 0
+[ 7536.242827] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 27301 off 135168 csum 0x8941f998 expected csum 0x0be49a8f mirror 1
+[ 7536.242831] [   T9092] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 2147, gen 0
+[ 7536.242834] [   T9116] BTRFS warning (device loop8): csum failed root 256 ino 27301 off 90112 csum 0x8941f998 expected csum 0x537bf151 mirror 1
+[ 7536.242889] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 2987, gen 0
+[ 7536.242915] [   T9092] BTRFS warning (device loop8): csum failed root 256 ino 27301 off 139264 csum 0x8941f998 expected csum 0xaf09c4d1 mirror 1
+[ 7536.242919] [   T9092] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 2148, gen 0
+[ 7536.242926] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 2988, gen 0
+[ 7536.242930] [   T9119] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 4273, gen 0
+[ 7541.243298] [   T9106] btrfs_print_data_csum_error: 9741 callbacks suppressed
+[ 7541.243306] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 28063 off 487424 csum 0x8941f998 expected csum 0xda38b2ce mirror 3
+[ 7541.243525] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 28063 off 491520 csum 0x8941f998 expected csum 0xe96b2524 mirror 3
+[ 7541.244295] [   T7877] BTRFS warning (device loop8): csum failed root 256 ino 28063 off 495616 csum 0x8941f998 expected csum 0xfed6331c mirror 3
+[ 7541.244723] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 28063 off 499712 csum 0x8941f998 expected csum 0xafec122e mirror 4
+[ 7541.245102] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 28063 off 434176 csum 0x8941f998 expected csum 0xc0026cd4 mirror 4
+[ 7541.245401] [   T9112] BTRFS warning (device loop8): csum failed root 256 ino 28063 off 503808 csum 0x8941f998 expected csum 0xcc95d3a5 mirror 4
+[ 7541.245891] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 28063 off 438272 csum 0x8941f998 expected csum 0x757b310d mirror 4
+[ 7541.246719] [   T9111] BTRFS warning (device loop8): csum failed root 256 ino 28063 off 507904 csum 0x8941f998 expected csum 0x407dab8b mirror 4
+[ 7541.247408] [   T9106] BTRFS warning (device loop8): csum failed root 256 ino 28063 off 442368 csum 0x8941f998 expected csum 0x88168406 mirror 4
+[ 7541.247771] [   T9034] BTRFS warning (device loop8): csum failed root 256 ino 28063 off 512000 csum 0x8941f998 expected csum 0xb1de207f mirror 4
+[ 7541.304254] [   T7877] btrfs_dev_stat_inc_and_print: 1223 callbacks suppressed
+[ 7541.304262] [   T7877] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2138, gen 0
+[ 7541.304501] [   T9106] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 4822, gen 0
+[ 7541.304959] [   T7877] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2139, gen 0
+[ 7541.305750] [   T9106] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 4823, gen 0
+[ 7541.306613] [   T7877] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2140, gen 0
+[ 7541.307467] [   T9106] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 4824, gen 0
+[ 7541.308261] [   T7877] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2141, gen 0
+[ 7541.311717] [   T9106] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 4825, gen 0
+[ 7541.312563] [   T7877] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2142, gen 0
+[ 7541.314972] [   T9106] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 4826, gen 0
+[ 7570.763120] [   T8892] bash (8892): drop_caches: 3
+[ 7573.277867] [   T9092] btrfs_print_data_csum_error: 1335 callbacks suppressed
+[ 7573.277875] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 262144 csum 0x8941f998 expected csum 0xdfd73654 mirror 1
+[ 7573.278302] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 327680 csum 0x8941f998 expected csum 0xb5e34cb2 mirror 1
+[ 7573.278502] [   T9092] btrfs_dev_stat_inc_and_print: 144 callbacks suppressed
+[ 7573.278505] [   T9092] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 4162, gen 0
+[ 7573.279333] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 393216 csum 0x8941f998 expected csum 0xceadd5b8 mirror 1
+[ 7573.279342] [   T9116] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 1889, gen 0
+[ 7573.279348] [   T9034] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 4934, gen 0
+[ 7573.279406] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 397312 csum 0x8941f998 expected csum 0x11696a6e mirror 1
+[ 7573.279412] [   T9116] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 1890, gen 0
+[ 7573.279448] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 401408 csum 0x8941f998 expected csum 0x07c9485e mirror 1
+[ 7573.279447] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 458752 csum 0x8941f998 expected csum 0x9246903c mirror 1
+[ 7573.279453] [   T9116] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 1891, gen 0
+[ 7573.279462] [   T5992] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2180, gen 0
+[ 7573.279488] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 405504 csum 0x8941f998 expected csum 0x8cf971f8 mirror 1
+[ 7573.279493] [   T9116] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 1892, gen 0
+[ 7573.279520] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 462848 csum 0x8941f998 expected csum 0xc0c280c5 mirror 1
+[ 7573.279526] [   T5992] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2181, gen 0
+[ 7573.279526] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 409600 csum 0x8941f998 expected csum 0xb54d2a91 mirror 1
+[ 7573.279532] [   T9116] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 1893, gen 0
+[ 7573.279565] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 413696 csum 0x8941f998 expected csum 0xb452e55b mirror 1
+[ 7573.279570] [   T9116] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 1894, gen 0
+[ 7578.278090] [   T7877] btrfs_print_data_csum_error: 10400 callbacks suppressed
+[ 7578.278098] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 479232 csum 0x8941f998 expected csum 0xbecd3568 mirror 6
+[ 7578.278739] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 413696 csum 0x8941f998 expected csum 0xb452e55b mirror 6
+[ 7578.279279] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 483328 csum 0x8941f998 expected csum 0x857d7360 mirror 6
+[ 7578.279573] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 417792 csum 0x8941f998 expected csum 0x6ca36a50 mirror 6
+[ 7578.279878] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 487424 csum 0x8941f998 expected csum 0xe8b96a4a mirror 6
+[ 7578.280295] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 421888 csum 0x8941f998 expected csum 0xc48ef4b5 mirror 6
+[ 7578.280679] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 491520 csum 0x8941f998 expected csum 0xf339cd2c mirror 6
+[ 7578.281064] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 425984 csum 0x8941f998 expected csum 0xcbf87dac mirror 6
+[ 7578.281436] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 495616 csum 0x8941f998 expected csum 0x5bc97e63 mirror 6
+[ 7578.281868] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 1694 off 430080 csum 0x8941f998 expected csum 0x2929ba8e mirror 6
+[ 7578.328228] [   T9096] btrfs_dev_stat_inc_and_print: 1302 callbacks suppressed
+[ 7578.328237] [   T9096] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 2273, gen 0
+[ 7578.328235] [   T9092] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2564, gen 0
+[ 7578.328326] [   T9092] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2565, gen 0
+[ 7578.328880] [   T9096] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 2274, gen 0
+[ 7578.328917] [   T9096] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 2275, gen 0
+[ 7578.328949] [   T9096] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 2276, gen 0
+[ 7578.329034] [   T9096] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 2277, gen 0
+[ 7578.329822] [   T9092] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2566, gen 0
+[ 7578.329862] [   T9092] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2567, gen 0
+[ 7578.329904] [   T9092] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2568, gen 0
+[ 7583.280722] [   T9106] btrfs_print_data_csum_error: 9168 callbacks suppressed
+[ 7583.280747] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 2092 off 401408 csum 0x8941f998 expected csum 0x95b9c75e mirror 5
+[ 7583.282432] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 2092 off 405504 csum 0x8941f998 expected csum 0x07be8995 mirror 5
+[ 7583.283959] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 2092 off 409600 csum 0x8941f998 expected csum 0xa761b506 mirror 5
+[ 7583.285492] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 2092 off 413696 csum 0x8941f998 expected csum 0x985f053b mirror 5
+[ 7583.286219] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 2092 off 417792 csum 0x8941f998 expected csum 0x2c7bf463 mirror 5
+[ 7583.286631] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 2092 off 421888 csum 0x8941f998 expected csum 0x3e9b6e55 mirror 5
+[ 7583.287378] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 2092 off 425984 csum 0x8941f998 expected csum 0x8bdd4bc6 mirror 5
+[ 7583.288406] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 2092 off 430080 csum 0x8941f998 expected csum 0x9dcbacd4 mirror 5
+[ 7583.288892] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 2092 off 466944 csum 0x8941f998 expected csum 0xae9e354d mirror 5
+[ 7583.289326] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 2092 off 434176 csum 0x8941f998 expected csum 0xe93718f1 mirror 5
+[ 7583.358074] [   T9112] btrfs_dev_stat_inc_and_print: 1142 callbacks suppressed
+[ 7583.358091] [   T9096] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2868, gen 0
+[ 7583.358108] [   T9112] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 2577, gen 0
+[ 7583.358168] [   T9112] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 2578, gen 0
+[ 7583.358868] [   T9096] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2869, gen 0
+[ 7583.359870] [   T9112] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 2579, gen 0
+[ 7583.361512] [   T9096] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2870, gen 0
+[ 7583.361558] [   T9096] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2871, gen 0
+[ 7583.363128] [   T9112] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 2580, gen 0
+[ 7583.363916] [   T9096] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 2872, gen 0
+[ 7583.364822] [   T9112] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 2581, gen 0
+[ 7588.281465] [   T9106] btrfs_print_data_csum_error: 8591 callbacks suppressed
+[ 7588.281473] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 2707 off 380928 csum 0x8941f998 expected csum 0x081535a9 mirror 2
+[ 7588.282179] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 2707 off 385024 csum 0x8941f998 expected csum 0x981fa972 mirror 2
+[ 7588.282490] [   T9119] BTRFS warning (device loop8): csum failed root 257 ino 2707 off 389120 csum 0x8941f998 expected csum 0x2c394b7f mirror 2
+[ 7588.282845] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 2707 off 327680 csum 0x8941f998 expected csum 0xf711428a mirror 3
+[ 7588.283219] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 2707 off 331776 csum 0x8941f998 expected csum 0x9b7b7ff0 mirror 3
+[ 7588.283621] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 2707 off 335872 csum 0x8941f998 expected csum 0x64df9c56 mirror 3
+[ 7588.284039] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 2707 off 339968 csum 0x8941f998 expected csum 0x573b2c8f mirror 3
+[ 7588.284263] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 2707 off 344064 csum 0x8941f998 expected csum 0xcd6195bc mirror 3
+[ 7588.284804] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 2707 off 348160 csum 0x8941f998 expected csum 0xfbb36974 mirror 3
+[ 7588.285467] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 2707 off 352256 csum 0x8941f998 expected csum 0x28113615 mirror 3
+[ 7588.360925] [   T9092] btrfs_dev_stat_inc_and_print: 1078 callbacks suppressed
+[ 7588.360932] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 3141, gen 0
+[ 7588.365088] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 3142, gen 0
+[ 7588.367584] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 3143, gen 0
+[ 7588.372279] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 3144, gen 0
+[ 7588.375189] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 3145, gen 0
+[ 7588.378226] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 3146, gen 0
+[ 7588.380862] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 3147, gen 0
+[ 7588.384472] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 3148, gen 0
+[ 7588.388138] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 3149, gen 0
+[ 7588.391234] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 3150, gen 0
+[ 7593.831765] [   T9092] btrfs_print_data_csum_error: 10201 callbacks suppressed
+[ 7593.831784] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 262144 csum 0x8941f998 expected csum 0xfe41576b mirror 1
+[ 7593.832531] [   T9119] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 327680 csum 0x8941f998 expected csum 0x8b2e3979 mirror 1
+[ 7593.832555] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 458752 csum 0x8941f998 expected csum 0xb6ef9f98 mirror 1
+[ 7593.832558] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 393216 csum 0x8941f998 expected csum 0x15236dc4 mirror 1
+[ 7593.832563] [   T9034] btrfs_dev_stat_inc_and_print: 1238 callbacks suppressed
+[ 7593.832595] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 2937, gen 0
+[ 7593.832599] [   T9034] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 5072, gen 0
+[ 7593.832653] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 397312 csum 0x8941f998 expected csum 0xb49ea844 mirror 1
+[ 7593.832659] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 2938, gen 0
+[ 7593.832661] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 462848 csum 0x8941f998 expected csum 0x05d3ba80 mirror 1
+[ 7593.832666] [   T9034] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 5073, gen 0
+[ 7593.832695] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 401408 csum 0x8941f998 expected csum 0x6f57f87e mirror 1
+[ 7593.832700] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 2939, gen 0
+[ 7593.832700] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 466944 csum 0x8941f998 expected csum 0x666c96dc mirror 1
+[ 7593.832705] [   T9034] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 5074, gen 0
+[ 7593.832732] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 405504 csum 0x8941f998 expected csum 0xcd0453bf mirror 1
+[ 7593.832737] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 2940, gen 0
+[ 7593.832742] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 471040 csum 0x8941f998 expected csum 0xcad9fe53 mirror 1
+[ 7593.832750] [   T9034] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 5075, gen 0
+[ 7593.832785] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 2941, gen 0
+[ 7593.832824] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 2942, gen 0
+[ 7598.832176] [   T9106] btrfs_print_data_csum_error: 10612 callbacks suppressed
+[ 7598.832184] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 450560 csum 0x8941f998 expected csum 0xfbce8f51 mirror 4
+[ 7598.832546] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 454656 csum 0x8941f998 expected csum 0x4de04a35 mirror 4
+[ 7598.832963] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 393216 csum 0x8941f998 expected csum 0x15236dc4 mirror 5
+[ 7598.833444] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 458752 csum 0x8941f998 expected csum 0xb6ef9f98 mirror 5
+[ 7598.834190] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 397312 csum 0x8941f998 expected csum 0xb49ea844 mirror 5
+[ 7598.835279] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 462848 csum 0x8941f998 expected csum 0x05d3ba80 mirror 5
+[ 7598.835503] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 401408 csum 0x8941f998 expected csum 0x6f57f87e mirror 5
+[ 7598.835916] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 466944 csum 0x8941f998 expected csum 0x666c96dc mirror 5
+[ 7598.836423] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 471040 csum 0x8941f998 expected csum 0xcad9fe53 mirror 5
+[ 7598.837092] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 3308 off 405504 csum 0x8941f998 expected csum 0xcd0453bf mirror 5
+[ 7598.899469] [   T9116] btrfs_dev_stat_inc_and_print: 1334 callbacks suppressed
+[ 7598.899479] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 3337, gen 0
+[ 7598.899524] [   T9096] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 5472, gen 0
+[ 7598.900233] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 3338, gen 0
+[ 7598.900276] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 3339, gen 0
+[ 7598.900310] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 3340, gen 0
+[ 7598.900344] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 3341, gen 0
+[ 7598.900399] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 3342, gen 0
+[ 7598.900431] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 3343, gen 0
+[ 7598.900460] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 3344, gen 0
+[ 7598.900485] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 3345, gen 0
+[ 7603.833384] [   T9106] btrfs_print_data_csum_error: 3926 callbacks suppressed
+[ 7603.833392] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 319488 csum 0x8941f998 expected csum 0xe0d115db mirror 8
+[ 7603.833783] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 323584 csum 0x8941f998 expected csum 0x36222c06 mirror 8
+[ 7603.841703] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 262144 csum 0x8941f998 expected csum 0x545e704e mirror 1
+[ 7603.845029] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 266240 csum 0x8941f998 expected csum 0x745b52a5 mirror 1
+[ 7603.845856] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 262144 csum 0x8941f998 expected csum 0x545e704e mirror 2
+[ 7603.848478] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 270336 csum 0x8941f998 expected csum 0xfd227ac2 mirror 1
+[ 7603.849125] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 266240 csum 0x8941f998 expected csum 0x745b52a5 mirror 2
+[ 7603.849687] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 262144 csum 0x8941f998 expected csum 0x545e704e mirror 3
+[ 7603.850022] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 274432 csum 0x8941f998 expected csum 0x4dd24860 mirror 1
+[ 7603.850212] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 262144 csum 0x8941f998 expected csum 0x545e704e mirror 4
+[ 7603.911909] [   T9106] btrfs_dev_stat_inc_and_print: 482 callbacks suppressed
+[ 7603.911917] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 5587, gen 0
+[ 7603.916576] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 5588, gen 0
+[ 7603.920427] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 5589, gen 0
+[ 7603.923205] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 5590, gen 0
+[ 7603.926126] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 5591, gen 0
+[ 7603.928507] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 5592, gen 0
+[ 7603.931377] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 5593, gen 0
+[ 7603.934633] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 5594, gen 0
+[ 7603.938568] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 5595, gen 0
+[ 7603.944476] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 5596, gen 0
+[ 7608.834954] [   T9096] btrfs_print_data_csum_error: 9600 callbacks suppressed
+[ 7608.834962] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 409600 csum 0x8941f998 expected csum 0x6bb5e7ee mirror 5
+[ 7608.835507] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 475136 csum 0x8941f998 expected csum 0x2786e0d2 mirror 5
+[ 7608.836000] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 413696 csum 0x8941f998 expected csum 0x8a9c3b5f mirror 5
+[ 7608.836507] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 479232 csum 0x8941f998 expected csum 0x705b4d2a mirror 5
+[ 7608.837192] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 417792 csum 0x8941f998 expected csum 0x533f536f mirror 5
+[ 7608.837605] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 421888 csum 0x8941f998 expected csum 0x00a5471c mirror 5
+[ 7608.837963] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 425984 csum 0x8941f998 expected csum 0xece1cb58 mirror 5
+[ 7608.839189] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 483328 csum 0x8941f998 expected csum 0x829dbb6d mirror 5
+[ 7608.839525] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 430080 csum 0x8941f998 expected csum 0xc116f8be mirror 5
+[ 7608.839896] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 5856 off 434176 csum 0x8941f998 expected csum 0xedeb8ef6 mirror 5
+[ 7609.035234] [   T9111] btrfs_dev_stat_inc_and_print: 1222 callbacks suppressed
+[ 7609.035244] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 3881, gen 0
+[ 7609.035276] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 6016, gen 0
+[ 7609.035850] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 3882, gen 0
+[ 7609.036696] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 6017, gen 0
+[ 7609.038221] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 3883, gen 0
+[ 7609.038936] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 6018, gen 0
+[ 7609.039855] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 3884, gen 0
+[ 7609.040544] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 6019, gen 0
+[ 7609.041289] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 3885, gen 0
+[ 7609.041976] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 6020, gen 0
+[ 7613.835292] [   T9116] btrfs_print_data_csum_error: 7192 callbacks suppressed
+[ 7613.835299] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 6993 off 335872 csum 0x8941f998 expected csum 0xb7143d0c mirror 4
+[ 7613.835625] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 6993 off 339968 csum 0x8941f998 expected csum 0x047ab379 mirror 4
+[ 7613.838030] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 6993 off 344064 csum 0x8941f998 expected csum 0x71cdaf4a mirror 4
+[ 7613.838925] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 6993 off 348160 csum 0x8941f998 expected csum 0x539f5339 mirror 4
+[ 7613.839365] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 6993 off 352256 csum 0x8941f998 expected csum 0x72154ea5 mirror 4
+[ 7613.839519] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 6993 off 356352 csum 0x8941f998 expected csum 0xdb3758b9 mirror 4
+[ 7613.839823] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 6993 off 360448 csum 0x8941f998 expected csum 0x7f10f11a mirror 4
+[ 7613.840284] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 6993 off 364544 csum 0x8941f998 expected csum 0x312f58a5 mirror 4
+[ 7613.840707] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 6993 off 368640 csum 0x8941f998 expected csum 0x75b09a76 mirror 4
+[ 7613.841342] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 6993 off 372736 csum 0x8941f998 expected csum 0xad21c355 mirror 4
+[ 7614.055981] [   T9092] btrfs_dev_stat_inc_and_print: 901 callbacks suppressed
+[ 7614.055987] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 4272, gen 0
+[ 7614.061074] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 4273, gen 0
+[ 7614.064194] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 4274, gen 0
+[ 7614.067256] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 4275, gen 0
+[ 7614.069780] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 4276, gen 0
+[ 7614.073373] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 4277, gen 0
+[ 7614.081665] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 4278, gen 0
+[ 7614.084411] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 4279, gen 0
+[ 7614.087700] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 4280, gen 0
+[ 7614.091372] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 4281, gen 0
+[ 7618.888365] [   T5992] btrfs_print_data_csum_error: 8772 callbacks suppressed
+[ 7618.888396] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 7897 off 114688 csum 0x8941f998 expected csum 0x3ee9ffa0 mirror 1
+[ 7618.895324] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 7897 off 118784 csum 0x8941f998 expected csum 0x7f409269 mirror 1
+[ 7618.899274] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 7897 off 122880 csum 0x8941f998 expected csum 0xd692985e mirror 1
+[ 7618.903216] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 7897 off 126976 csum 0x8941f998 expected csum 0x92cf073f mirror 1
+[ 7618.916183] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 7897 off 114688 csum 0x8941f998 expected csum 0x3ee9ffa0 mirror 2
+[ 7618.917782] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 7897 off 118784 csum 0x8941f998 expected csum 0x7f409269 mirror 2
+[ 7618.919198] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 7897 off 122880 csum 0x8941f998 expected csum 0xd692985e mirror 2
+[ 7618.919558] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 7897 off 126976 csum 0x8941f998 expected csum 0x92cf073f mirror 2
+[ 7618.920760] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 7897 off 122880 csum 0x8941f998 expected csum 0xd692985e mirror 3
+[ 7618.920901] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 7897 off 126976 csum 0x8941f998 expected csum 0x92cf073f mirror 3
+[ 7620.653651] [   T5992] btrfs_dev_stat_inc_and_print: 1066 callbacks suppressed
+[ 7620.653662] [   T5992] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 5478, gen 0
+[ 7620.653682] [   T9092] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 2945, gen 0
+[ 7620.655909] [   T5992] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 5479, gen 0
+[ 7620.656637] [   T9092] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 2946, gen 0
+[ 7620.657419] [   T5992] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 5480, gen 0
+[ 7620.658207] [   T9092] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 2947, gen 0
+[ 7620.658969] [   T5992] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 5481, gen 0
+[ 7620.659787] [   T9092] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 2948, gen 0
+[ 7620.660554] [   T5992] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 5482, gen 0
+[ 7620.661371] [   T9092] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 2949, gen 0
+[ 7624.164850] [   T9092] btrfs_print_data_csum_error: 4630 callbacks suppressed
+[ 7624.164859] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 10690 off 4096 csum 0x8941f998 expected csum 0xfd8c564a mirror 1
+[ 7624.170970] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 10690 off 8192 csum 0x8941f998 expected csum 0x2a1206c4 mirror 1
+[ 7624.171920] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 10690 off 4096 csum 0x8941f998 expected csum 0xfd8c564a mirror 2
+[ 7624.172049] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 10690 off 12288 csum 0x8941f998 expected csum 0x10d72088 mirror 1
+[ 7624.173525] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 10690 off 8192 csum 0x8941f998 expected csum 0x2a1206c4 mirror 2
+[ 7624.174093] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 10690 off 4096 csum 0x8941f998 expected csum 0xfd8c564a mirror 3
+[ 7624.174703] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 10690 off 12288 csum 0x8941f998 expected csum 0x10d72088 mirror 2
+[ 7624.175449] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 10690 off 12288 csum 0x8941f998 expected csum 0x10d72088 mirror 3
+[ 7624.177664] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 10690 off 8192 csum 0x8941f998 expected csum 0x2a1206c4 mirror 3
+[ 7624.178066] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 10690 off 4096 csum 0x8941f998 expected csum 0xfd8c564a mirror 4
+[ 7625.773008] [   T7877] btrfs_dev_stat_inc_and_print: 654 callbacks suppressed
+[ 7625.773023] [   T7877] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 6850, gen 0
+[ 7625.775997] [   T9092] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 4722, gen 0
+[ 7625.776333] [   T7877] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 6851, gen 0
+[ 7625.776962] [   T9092] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 4723, gen 0
+[ 7625.777898] [   T7877] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 6852, gen 0
+[ 7625.777955] [   T7877] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 6853, gen 0
+[ 7625.777989] [   T7877] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 6854, gen 0
+[ 7625.778020] [   T7877] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 6855, gen 0
+[ 7625.778049] [   T7877] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 6856, gen 0
+[ 7625.778078] [   T7877] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 6857, gen 0
+[ 7629.165771] [   T9111] btrfs_print_data_csum_error: 7915 callbacks suppressed
+[ 7629.165778] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 11739 off 446464 csum 0x8941f998 expected csum 0x91a9d979 mirror 2
+[ 7629.166898] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 11739 off 491520 csum 0x8941f998 expected csum 0x55664945 mirror 2
+[ 7629.168902] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 11739 off 450560 csum 0x8941f998 expected csum 0x971a2df3 mirror 2
+[ 7629.169974] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 11739 off 495616 csum 0x8941f998 expected csum 0xb5b47f38 mirror 2
+[ 7629.170741] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 11739 off 499712 csum 0x8941f998 expected csum 0x179ae779 mirror 2
+[ 7629.171069] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 11739 off 454656 csum 0x8941f998 expected csum 0xda6630b5 mirror 2
+[ 7629.171695] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 11739 off 393216 csum 0x8941f998 expected csum 0xb3b34362 mirror 3
+[ 7629.172134] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 11739 off 503808 csum 0x8941f998 expected csum 0x45888f2e mirror 2
+[ 7629.172617] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 11739 off 507904 csum 0x8941f998 expected csum 0x407d9e56 mirror 2
+[ 7629.173111] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 11739 off 512000 csum 0x8941f998 expected csum 0xa38dedd6 mirror 2
+[ 7630.794836] [   T9092] btrfs_dev_stat_inc_and_print: 1120 callbacks suppressed
+[ 7630.794836] [   T5992] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 3250, gen 0
+[ 7630.794854] [   T9092] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 3309, gen 0
+[ 7630.794918] [   T9092] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 3310, gen 0
+[ 7630.795492] [   T5992] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 3251, gen 0
+[ 7630.797018] [   T9092] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 3311, gen 0
+[ 7630.816445] [   T9092] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 3312, gen 0
+[ 7630.820644] [   T9092] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 3313, gen 0
+[ 7630.823842] [   T9092] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 3314, gen 0
+[ 7630.844481] [   T5992] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 3252, gen 0
+[ 7630.846891] [   T9092] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 3315, gen 0
+[ 7634.166360] [   T9111] btrfs_print_data_csum_error: 5330 callbacks suppressed
+[ 7634.166369] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 13585 off 331776 csum 0x8941f998 expected csum 0xd801d92e mirror 5
+[ 7634.166821] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 13585 off 335872 csum 0x8941f998 expected csum 0xa4a6dc21 mirror 5
+[ 7634.167268] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 13585 off 339968 csum 0x8941f998 expected csum 0x421d86eb mirror 5
+[ 7634.167630] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 13585 off 344064 csum 0x8941f998 expected csum 0xbb86dc17 mirror 5
+[ 7634.168030] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 13585 off 348160 csum 0x8941f998 expected csum 0x8a5589e2 mirror 5
+[ 7634.168663] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 13585 off 352256 csum 0x8941f998 expected csum 0x99e1b0bc mirror 5
+[ 7634.169029] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 13585 off 356352 csum 0x8941f998 expected csum 0x336821f2 mirror 5
+[ 7634.169449] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 13585 off 360448 csum 0x8941f998 expected csum 0xa42ce55a mirror 5
+[ 7634.169758] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 13585 off 364544 csum 0x8941f998 expected csum 0x0973199f mirror 5
+[ 7634.170136] [   T9119] BTRFS warning (device loop8): csum failed root 257 ino 13585 off 368640 csum 0x8941f998 expected csum 0x3908fceb mirror 5
+[ 7635.810662] [   T9106] btrfs_dev_stat_inc_and_print: 806 callbacks suppressed
+[ 7635.810671] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 6163, gen 0
+[ 7635.810679] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 4452, gen 0
+[ 7635.811338] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 6164, gen 0
+[ 7635.812017] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 4453, gen 0
+[ 7635.812783] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 6165, gen 0
+[ 7635.813587] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 4454, gen 0
+[ 7635.814379] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 6166, gen 0
+[ 7635.815118] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 4455, gen 0
+[ 7635.817828] [   T9106] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 6167, gen 0
+[ 7635.819152] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 4456, gen 0
+[ 7639.237064] [   T9092] btrfs_print_data_csum_error: 9653 callbacks suppressed
+[ 7639.237070] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 13696 off 458752 csum 0x8941f998 expected csum 0x8f8326ad mirror 1
+[ 7639.237072] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 13696 off 393216 csum 0x8941f998 expected csum 0x54dd2fcd mirror 1
+[ 7639.237149] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 13696 off 462848 csum 0x8941f998 expected csum 0xa1224c9c mirror 1
+[ 7639.237745] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 13696 off 397312 csum 0x8941f998 expected csum 0xb27bdb8f mirror 1
+[ 7639.238229] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 13696 off 458752 csum 0x8941f998 expected csum 0x8f8326ad mirror 2
+[ 7639.238783] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 13696 off 393216 csum 0x8941f998 expected csum 0x54dd2fcd mirror 2
+[ 7639.239593] [   T9119] BTRFS warning (device loop8): csum failed root 257 ino 13696 off 458752 csum 0x8941f998 expected csum 0x8f8326ad mirror 3
+[ 7639.239674] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 13696 off 393216 csum 0x8941f998 expected csum 0x54dd2fcd mirror 3
+[ 7639.240158] [   T9119] BTRFS warning (device loop8): csum failed root 257 ino 13696 off 458752 csum 0x8941f998 expected csum 0x8f8326ad mirror 4
+[ 7639.240579] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 13696 off 393216 csum 0x8941f998 expected csum 0x54dd2fcd mirror 4
+[ 7640.880003] [   T9106] btrfs_dev_stat_inc_and_print: 1206 callbacks suppressed
+[ 7640.880010] [   T9106] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 5060, gen 0
+[ 7640.880025] [   T9096] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 4729, gen 0
+[ 7640.880667] [   T9106] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 5061, gen 0
+[ 7640.881474] [   T9096] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 4730, gen 0
+[ 7640.882037] [   T9106] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 5062, gen 0
+[ 7640.883558] [   T9096] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 4731, gen 0
+[ 7640.884170] [   T9106] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 5063, gen 0
+[ 7640.885759] [   T9096] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 4732, gen 0
+[ 7640.887143] [   T9106] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 5064, gen 0
+[ 7640.888677] [   T9096] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 4733, gen 0
+[ 7644.237273] [   T9034] btrfs_print_data_csum_error: 9848 callbacks suppressed
+[ 7644.237282] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 13934 off 106496 csum 0x8941f998 expected csum 0x584e7bd2 mirror 7
+[ 7644.237736] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 13934 off 110592 csum 0x8941f998 expected csum 0xaee4d761 mirror 7
+[ 7644.238806] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 13934 off 114688 csum 0x8941f998 expected csum 0x292654a5 mirror 7
+[ 7644.239361] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 13934 off 118784 csum 0x8941f998 expected csum 0x05b8ba78 mirror 7
+[ 7644.239887] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 13934 off 122880 csum 0x8941f998 expected csum 0xab054952 mirror 7
+[ 7644.240453] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 13934 off 126976 csum 0x8941f998 expected csum 0x0b8c1a59 mirror 7
+[ 7644.240854] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 13934 off 98304 csum 0x8941f998 expected csum 0xa392db46 mirror 8
+[ 7644.241671] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 13934 off 102400 csum 0x8941f998 expected csum 0x49f9f636 mirror 8
+[ 7644.243705] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 13934 off 106496 csum 0x8941f998 expected csum 0x584e7bd2 mirror 8
+[ 7644.244254] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 13934 off 118784 csum 0x8941f998 expected csum 0x05b8ba78 mirror 8
+[ 7645.923781] [   T9116] btrfs_dev_stat_inc_and_print: 1192 callbacks suppressed
+[ 7645.923790] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5161, gen 0
+[ 7645.928793] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5162, gen 0
+[ 7645.931615] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5163, gen 0
+[ 7645.934841] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5164, gen 0
+[ 7645.937640] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5165, gen 0
+[ 7645.940502] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5166, gen 0
+[ 7645.944098] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5167, gen 0
+[ 7645.947512] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5168, gen 0
+[ 7645.950497] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5169, gen 0
+[ 7645.954266] [   T9116] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5170, gen 0
+[ 7649.412194] [   T5992] btrfs_print_data_csum_error: 8708 callbacks suppressed
+[ 7649.412707] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 327680 csum 0x8941f998 expected csum 0xaf7cf694 mirror 1
+[ 7649.412768] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 262144 csum 0x8941f998 expected csum 0x55a16220 mirror 1
+[ 7649.412920] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 393216 csum 0x8941f998 expected csum 0x54782bcb mirror 1
+[ 7649.412973] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 458752 csum 0x8941f998 expected csum 0x6285a014 mirror 1
+[ 7649.412977] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 397312 csum 0x8941f998 expected csum 0xff82fa0d mirror 1
+[ 7649.413015] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 401408 csum 0x8941f998 expected csum 0x6c2aa935 mirror 1
+[ 7649.413042] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 405504 csum 0x8941f998 expected csum 0xad78e677 mirror 1
+[ 7649.413042] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 462848 csum 0x8941f998 expected csum 0x9acad035 mirror 1
+[ 7649.413064] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 409600 csum 0x8941f998 expected csum 0x074648b9 mirror 1
+[ 7649.413075] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 466944 csum 0x8941f998 expected csum 0xebc6dcfc mirror 1
+[ 7650.973327] [   T9116] btrfs_dev_stat_inc_and_print: 1094 callbacks suppressed
+[ 7650.973338] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 5748, gen 0
+[ 7650.977817] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 5749, gen 0
+[ 7650.980790] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 5750, gen 0
+[ 7650.984820] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 5751, gen 0
+[ 7650.988143] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 5752, gen 0
+[ 7650.990888] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 5753, gen 0
+[ 7650.993722] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 5754, gen 0
+[ 7650.997443] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 5755, gen 0
+[ 7651.000955] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 5756, gen 0
+[ 7651.003906] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 5757, gen 0
+[ 7654.412387] [   T7877] btrfs_print_data_csum_error: 10189 callbacks suppressed
+[ 7654.412400] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 507904 csum 0x8941f998 expected csum 0x271cce15 mirror 7
+[ 7654.412938] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 438272 csum 0x8941f998 expected csum 0x8be2c14a mirror 7
+[ 7654.413388] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 512000 csum 0x8941f998 expected csum 0x29a472d2 mirror 7
+[ 7654.413798] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 442368 csum 0x8941f998 expected csum 0xfcff3204 mirror 7
+[ 7654.414589] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 516096 csum 0x8941f998 expected csum 0xe263183f mirror 7
+[ 7654.414731] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 520192 csum 0x8941f998 expected csum 0xb1473cb7 mirror 7
+[ 7654.415566] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 446464 csum 0x8941f998 expected csum 0x8384b240 mirror 7
+[ 7654.416384] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 450560 csum 0x8941f998 expected csum 0x47003406 mirror 7
+[ 7654.417313] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 454656 csum 0x8941f998 expected csum 0x77106bc3 mirror 7
+[ 7654.417729] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 14922 off 393216 csum 0x8941f998 expected csum 0x54782bcb mirror 8
+[ 7655.974705] [   T5992] btrfs_dev_stat_inc_and_print: 1223 callbacks suppressed
+[ 7655.974722] [   T5992] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5882, gen 0
+[ 7655.980266] [   T5992] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5883, gen 0
+[ 7655.983672] [   T5992] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5884, gen 0
+[ 7655.986570] [   T5992] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5885, gen 0
+[ 7655.990335] [   T5992] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5886, gen 0
+[ 7655.993308] [   T5992] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5887, gen 0
+[ 7655.996276] [   T5992] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5888, gen 0
+[ 7656.001166] [   T5992] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5889, gen 0
+[ 7656.022131] [   T9112] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5890, gen 0
+[ 7656.025736] [   T9112] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 5891, gen 0
+[ 7659.413376] [   T9096] btrfs_print_data_csum_error: 4886 callbacks suppressed
+[ 7659.413384] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 17229 off 192512 csum 0x8941f998 expected csum 0x7b9dff25 mirror 7
+[ 7659.413889] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 17229 off 131072 csum 0x8941f998 expected csum 0xe86df0e0 mirror 8
+[ 7659.414475] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 17229 off 135168 csum 0x8941f998 expected csum 0x7b1a9b57 mirror 8
+[ 7659.415006] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 17229 off 139264 csum 0x8941f998 expected csum 0x10082fbb mirror 8
+[ 7659.415519] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 17229 off 143360 csum 0x8941f998 expected csum 0x61a83afd mirror 8
+[ 7659.415861] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 17229 off 147456 csum 0x8941f998 expected csum 0x2eb462bf mirror 8
+[ 7659.416711] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 17229 off 151552 csum 0x8941f998 expected csum 0x45bccc08 mirror 8
+[ 7659.417197] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 17229 off 155648 csum 0x8941f998 expected csum 0x950d2333 mirror 8
+[ 7659.417719] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 17229 off 159744 csum 0x8941f998 expected csum 0xb4ff7df3 mirror 8
+[ 7659.418031] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 17229 off 163840 csum 0x8941f998 expected csum 0x344e81e8 mirror 8
+[ 7661.330180] [   T9096] btrfs_dev_stat_inc_and_print: 598 callbacks suppressed
+[ 7661.330184] [   T9106] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 5506, gen 0
+[ 7661.330188] [   T9096] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 8233, gen 0
+[ 7661.330291] [   T9106] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 5507, gen 0
+[ 7661.330846] [   T9096] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 8234, gen 0
+[ 7661.331487] [   T9106] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 5508, gen 0
+[ 7661.332229] [   T9096] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 8235, gen 0
+[ 7661.333065] [   T9106] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 5509, gen 0
+[ 7661.333842] [   T9096] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 8236, gen 0
+[ 7661.334551] [   T9106] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 5510, gen 0
+[ 7661.335369] [   T9096] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 8237, gen 0
+[ 7664.414577] [   T9096] btrfs_print_data_csum_error: 9046 callbacks suppressed
+[ 7664.414585] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 17835 off 487424 csum 0x8941f998 expected csum 0x3771e304 mirror 3
+[ 7664.415191] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 17835 off 425984 csum 0x8941f998 expected csum 0xe48592d5 mirror 3
+[ 7664.415743] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 17835 off 491520 csum 0x8941f998 expected csum 0x19aab25d mirror 3
+[ 7664.416189] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 17835 off 430080 csum 0x8941f998 expected csum 0x3238b465 mirror 3
+[ 7664.416538] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 17835 off 495616 csum 0x8941f998 expected csum 0x5f3bb220 mirror 3
+[ 7664.416846] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 17835 off 434176 csum 0x8941f998 expected csum 0x773d72b8 mirror 3
+[ 7664.417532] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 17835 off 499712 csum 0x8941f998 expected csum 0xd3e79ee1 mirror 3
+[ 7664.417993] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 17835 off 438272 csum 0x8941f998 expected csum 0x666eeac2 mirror 3
+[ 7664.418558] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 17835 off 503808 csum 0x8941f998 expected csum 0x0de67462 mirror 3
+[ 7664.418984] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 17835 off 442368 csum 0x8941f998 expected csum 0x71a6f68b mirror 3
+[ 7666.404597] [   T9111] btrfs_dev_stat_inc_and_print: 1302 callbacks suppressed
+[ 7666.404606] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 6602, gen 0
+[ 7666.404626] [   T9106] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 8889, gen 0
+[ 7666.406490] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 6603, gen 0
+[ 7666.407786] [   T9106] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 8890, gen 0
+[ 7666.408520] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 6604, gen 0
+[ 7666.409399] [   T9106] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 8891, gen 0
+[ 7666.410292] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 6605, gen 0
+[ 7666.411098] [   T9106] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 8892, gen 0
+[ 7666.411858] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 6606, gen 0
+[ 7666.412581] [   T9106] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 8893, gen 0
+[ 7669.415427] [   T9111] btrfs_print_data_csum_error: 9960 callbacks suppressed
+[ 7669.415438] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 17952 off 331776 csum 0x8941f998 expected csum 0xd2a5c4e4 mirror 5
+[ 7669.417432] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 17952 off 335872 csum 0x8941f998 expected csum 0xc9042d9c mirror 5
+[ 7669.417896] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 17952 off 339968 csum 0x8941f998 expected csum 0x27ab129c mirror 5
+[ 7669.418589] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 17952 off 344064 csum 0x8941f998 expected csum 0x814743c2 mirror 5
+[ 7669.418911] [   T9119] BTRFS warning (device loop8): csum failed root 257 ino 17952 off 348160 csum 0x8941f998 expected csum 0x2c6df757 mirror 5
+[ 7669.419390] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 17952 off 352256 csum 0x8941f998 expected csum 0x22ec7a07 mirror 5
+[ 7669.419871] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 17952 off 356352 csum 0x8941f998 expected csum 0x94868f7e mirror 5
+[ 7669.420462] [   T9119] BTRFS warning (device loop8): csum failed root 257 ino 17952 off 360448 csum 0x8941f998 expected csum 0xd967eeeb mirror 5
+[ 7669.421059] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 17952 off 364544 csum 0x8941f998 expected csum 0xd45c7986 mirror 5
+[ 7669.421693] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 17952 off 368640 csum 0x8941f998 expected csum 0x8210834a mirror 5
+[ 7671.427481] [   T9112] btrfs_dev_stat_inc_and_print: 1270 callbacks suppressed
+[ 7671.427490] [   T9112] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 9257, gen 0
+[ 7671.427501] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 6103, gen 0
+[ 7671.428171] [   T9112] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 9258, gen 0
+[ 7671.428934] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 6104, gen 0
+[ 7671.429911] [   T9112] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 9259, gen 0
+[ 7671.430820] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 6105, gen 0
+[ 7671.431512] [   T9112] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 9260, gen 0
+[ 7671.433759] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 6106, gen 0
+[ 7671.434435] [   T9112] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 9261, gen 0
+[ 7671.435167] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 6107, gen 0
+[ 7674.416666] [   T5992] btrfs_print_data_csum_error: 9865 callbacks suppressed
+[ 7674.416673] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 18621 off 114688 csum 0x8941f998 expected csum 0x40c1b60c mirror 4
+[ 7674.417169] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 18621 off 118784 csum 0x8941f998 expected csum 0xdc17dbe4 mirror 4
+[ 7674.417497] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 18621 off 122880 csum 0x8941f998 expected csum 0xdd689f64 mirror 4
+[ 7674.418681] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 18621 off 126976 csum 0x8941f998 expected csum 0x16c8895d mirror 4
+[ 7674.419254] [   T9119] BTRFS warning (device loop8): csum failed root 257 ino 18621 off 98304 csum 0x8941f998 expected csum 0x5b373fe8 mirror 5
+[ 7674.419848] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 18621 off 102400 csum 0x8941f998 expected csum 0x04c7f064 mirror 5
+[ 7674.420246] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 18621 off 106496 csum 0x8941f998 expected csum 0x726b6a12 mirror 5
+[ 7674.423564] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 18621 off 110592 csum 0x8941f998 expected csum 0x11481fab mirror 5
+[ 7674.424075] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 18621 off 114688 csum 0x8941f998 expected csum 0x40c1b60c mirror 5
+[ 7674.424749] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 18621 off 118784 csum 0x8941f998 expected csum 0xdc17dbe4 mirror 5
+[ 7676.446851] [   T5992] btrfs_dev_stat_inc_and_print: 893 callbacks suppressed
+[ 7676.446860] [   T5992] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 3753, gen 0
+[ 7676.451490] [   T5992] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 3754, gen 0
+[ 7676.454223] [   T5992] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 3755, gen 0
+[ 7676.457419] [   T5992] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 3756, gen 0
+[ 7676.460815] [   T5992] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 3757, gen 0
+[ 7676.464800] [   T5992] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 3758, gen 0
+[ 7676.467681] [   T5992] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 3759, gen 0
+[ 7676.470761] [   T5992] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 3760, gen 0
+[ 7676.474043] [   T5992] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 3761, gen 0
+[ 7676.477445] [   T5992] BTRFS error (device loop8): bdev /dev/loop13 errs: wr 0, rd 0, flush 0, corrupt 3762, gen 0
+[ 7679.417370] [   T9106] btrfs_print_data_csum_error: 8567 callbacks suppressed
+[ 7679.417378] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 19797 off 520192 csum 0x8941f998 expected csum 0x8de5981f mirror 5
+[ 7679.417687] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 19797 off 499712 csum 0x8941f998 expected csum 0x8fee58d6 mirror 5
+[ 7679.418247] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 19797 off 442368 csum 0x8941f998 expected csum 0x1c9868f2 mirror 5
+[ 7679.418535] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 19797 off 393216 csum 0x8941f998 expected csum 0xcd610dc1 mirror 6
+[ 7679.419152] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 19797 off 458752 csum 0x8941f998 expected csum 0xc62565ab mirror 6
+[ 7679.419280] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 19797 off 397312 csum 0x8941f998 expected csum 0xbfb7b82b mirror 6
+[ 7679.419653] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 19797 off 462848 csum 0x8941f998 expected csum 0x62959a2f mirror 6
+[ 7679.419956] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 19797 off 401408 csum 0x8941f998 expected csum 0xca97b75a mirror 6
+[ 7679.420280] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 19797 off 405504 csum 0x8941f998 expected csum 0x1be61160 mirror 6
+[ 7679.420623] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 19797 off 466944 csum 0x8941f998 expected csum 0x8ece64a7 mirror 6
+[ 7682.870432] [   T5992] btrfs_dev_stat_inc_and_print: 1382 callbacks suppressed
+[ 7682.870449] [   T5992] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 9561, gen 0
+[ 7682.871216] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 6407, gen 0
+[ 7682.871226] [   T9092] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 6922, gen 0
+[ 7682.871254] [   T9116] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 5778, gen 0
+[ 7682.871294] [   T9092] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 6923, gen 0
+[ 7682.871825] [   T9092] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 6924, gen 0
+[ 7682.871824] [   T9116] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 5779, gen 0
+[ 7682.871878] [   T9116] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 5780, gen 0
+[ 7682.871942] [   T9116] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 5781, gen 0
+[ 7682.871975] [   T9116] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 5782, gen 0
+[ 7684.418627] [   T9112] btrfs_print_data_csum_error: 7811 callbacks suppressed
+[ 7684.418638] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 21417 off 368640 csum 0x8941f998 expected csum 0x8569efb6 mirror 3
+[ 7684.419005] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 21417 off 372736 csum 0x8941f998 expected csum 0x7744c055 mirror 3
+[ 7684.419507] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 21417 off 376832 csum 0x8941f998 expected csum 0xf512d404 mirror 3
+[ 7684.419815] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 21417 off 380928 csum 0x8941f998 expected csum 0x24b76a6d mirror 3
+[ 7684.420168] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 21417 off 385024 csum 0x8941f998 expected csum 0xe30e96cc mirror 3
+[ 7684.420525] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 21417 off 389120 csum 0x8941f998 expected csum 0xb950dad1 mirror 3
+[ 7684.420878] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 21417 off 327680 csum 0x8941f998 expected csum 0x26a99179 mirror 4
+[ 7684.421249] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 21417 off 331776 csum 0x8941f998 expected csum 0x714c2110 mirror 4
+[ 7684.422142] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 21417 off 335872 csum 0x8941f998 expected csum 0xea8a075f mirror 4
+[ 7684.422856] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 21417 off 339968 csum 0x8941f998 expected csum 0xfb361ab4 mirror 4
+[ 7687.880209] [   T9112] btrfs_dev_stat_inc_and_print: 1334 callbacks suppressed
+[ 7687.880216] [   T9112] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 7322, gen 0
+[ 7687.880221] [   T9116] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 6178, gen 0
+[ 7687.880270] [   T9116] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 6179, gen 0
+[ 7687.881526] [   T9112] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 7323, gen 0
+[ 7687.881739] [   T9116] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 6180, gen 0
+[ 7687.883318] [   T9112] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 7324, gen 0
+[ 7687.883823] [   T9112] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 7325, gen 0
+[ 7687.885500] [   T9116] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 6181, gen 0
+[ 7687.885738] [   T9112] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 7326, gen 0
+[ 7687.886418] [   T9116] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 6182, gen 0
+[ 7689.419512] [   T9034] btrfs_print_data_csum_error: 9835 callbacks suppressed
+[ 7689.419521] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 348160 csum 0x8941f998 expected csum 0x5b9bdb99 mirror 7
+[ 7689.419759] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 479232 csum 0x8941f998 expected csum 0xa4341a32 mirror 7
+[ 7689.420213] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 413696 csum 0x8941f998 expected csum 0xcccc6e2b mirror 7
+[ 7689.420473] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 483328 csum 0x8941f998 expected csum 0x4b8d10ed mirror 7
+[ 7689.420852] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 352256 csum 0x8941f998 expected csum 0xfea325d8 mirror 7
+[ 7689.421213] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 262144 csum 0x8941f998 expected csum 0xc9ba2e34 mirror 8
+[ 7689.421654] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 487424 csum 0x8941f998 expected csum 0x74c0fc31 mirror 7
+[ 7689.421940] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 417792 csum 0x8941f998 expected csum 0xd87e0ca7 mirror 7
+[ 7689.422518] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 356352 csum 0x8941f998 expected csum 0x0d06a238 mirror 7
+[ 7689.423076] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 491520 csum 0x8941f998 expected csum 0x1a84b779 mirror 7
+[ 7692.985374] [   T9096] btrfs_dev_stat_inc_and_print: 1270 callbacks suppressed
+[ 7692.985382] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 7690, gen 0
+[ 7692.985444] [   T9106] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 6546, gen 0
+[ 7692.985974] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 7691, gen 0
+[ 7692.986590] [   T9106] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 6547, gen 0
+[ 7692.987382] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 7692, gen 0
+[ 7692.987931] [   T9106] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 6548, gen 0
+[ 7692.988706] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 7693, gen 0
+[ 7692.989507] [   T9106] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 6549, gen 0
+[ 7692.990259] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 7694, gen 0
+[ 7692.990906] [   T9106] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 6550, gen 0
+[ 7694.420736] [   T9116] btrfs_print_data_csum_error: 10900 callbacks suppressed
+[ 7694.420744] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 516096 csum 0x8941f998 expected csum 0x956b8d6a mirror 2
+[ 7694.421790] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 454656 csum 0x8941f998 expected csum 0xa65eec6f mirror 2
+[ 7694.422734] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 520192 csum 0x8941f998 expected csum 0x37bbb1b2 mirror 2
+[ 7694.423251] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 393216 csum 0x8941f998 expected csum 0x3dbf4dad mirror 3
+[ 7694.423707] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 458752 csum 0x8941f998 expected csum 0x5942f4b0 mirror 3
+[ 7694.426421] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 397312 csum 0x8941f998 expected csum 0xc3ee85a7 mirror 3
+[ 7694.426749] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 462848 csum 0x8941f998 expected csum 0x7e080d97 mirror 3
+[ 7694.427319] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 401408 csum 0x8941f998 expected csum 0xddca6649 mirror 3
+[ 7694.427800] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 466944 csum 0x8941f998 expected csum 0x147582c3 mirror 3
+[ 7694.428242] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 21891 off 405504 csum 0x8941f998 expected csum 0x7a3abd30 mirror 3
+[ 7697.991391] [   T9111] btrfs_dev_stat_inc_and_print: 1014 callbacks suppressed
+[ 7697.991399] [   T9111] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 10281, gen 0
+[ 7697.996054] [   T9111] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 10282, gen 0
+[ 7697.998933] [   T9111] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 10283, gen 0
+[ 7698.001791] [   T9111] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 10284, gen 0
+[ 7698.004692] [   T9111] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 10285, gen 0
+[ 7698.007507] [   T9111] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 10286, gen 0
+[ 7698.010563] [   T9111] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 10287, gen 0
+[ 7698.013655] [   T9111] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 10288, gen 0
+[ 7698.016711] [   T9111] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 10289, gen 0
+[ 7698.019562] [   T9111] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 10290, gen 0
+[ 7699.422805] [   T9092] btrfs_print_data_csum_error: 6641 callbacks suppressed
+[ 7699.422813] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 294912 csum 0x8941f998 expected csum 0xd6490c79 mirror 4
+[ 7699.424522] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 299008 csum 0x8941f998 expected csum 0x6703bfcf mirror 4
+[ 7699.425671] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 303104 csum 0x8941f998 expected csum 0xc1c16b5d mirror 4
+[ 7699.427588] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 307200 csum 0x8941f998 expected csum 0x6fc2c3a7 mirror 4
+[ 7699.428394] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 311296 csum 0x8941f998 expected csum 0x423675c8 mirror 4
+[ 7699.428872] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 315392 csum 0x8941f998 expected csum 0x9e74f961 mirror 4
+[ 7699.429470] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 319488 csum 0x8941f998 expected csum 0x18835d0c mirror 4
+[ 7699.429785] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 323584 csum 0x8941f998 expected csum 0x6fa401c8 mirror 4
+[ 7699.431024] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 262144 csum 0x8941f998 expected csum 0x235ca83b mirror 5
+[ 7699.432005] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 266240 csum 0x8941f998 expected csum 0x1accebbd mirror 5
+[ 7703.107065] [   T9092] btrfs_dev_stat_inc_and_print: 950 callbacks suppressed
+[ 7703.107073] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 7156, gen 0
+[ 7703.107085] [   T5992] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 7978, gen 0
+[ 7703.107781] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 7157, gen 0
+[ 7703.108592] [   T5992] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 7979, gen 0
+[ 7703.109259] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 7158, gen 0
+[ 7703.111063] [   T5992] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 7980, gen 0
+[ 7703.111756] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 7159, gen 0
+[ 7703.112527] [   T5992] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 7981, gen 0
+[ 7703.113291] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 7160, gen 0
+[ 7703.114079] [   T5992] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 7982, gen 0
+[ 7704.423821] [   T9106] btrfs_print_data_csum_error: 8283 callbacks suppressed
+[ 7704.423829] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 512000 csum 0x8941f998 expected csum 0xf7496736 mirror 5
+[ 7704.425752] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 516096 csum 0x8941f998 expected csum 0x5c4169a9 mirror 5
+[ 7704.426187] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 520192 csum 0x8941f998 expected csum 0xa1b8d680 mirror 5
+[ 7704.426700] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 393216 csum 0x8941f998 expected csum 0x52925db3 mirror 6
+[ 7704.427119] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 397312 csum 0x8941f998 expected csum 0x8bcf95c8 mirror 6
+[ 7704.429550] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 458752 csum 0x8941f998 expected csum 0x7dc29669 mirror 6
+[ 7704.430065] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 401408 csum 0x8941f998 expected csum 0xcf9ac12f mirror 6
+[ 7704.430613] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 462848 csum 0x8941f998 expected csum 0x6b5118c6 mirror 6
+[ 7704.431202] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 405504 csum 0x8941f998 expected csum 0xeb774f15 mirror 6
+[ 7704.431758] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 23926 off 409600 csum 0x8941f998 expected csum 0xed2371aa mirror 6
+[ 7708.146815] [   T9116] btrfs_dev_stat_inc_and_print: 1046 callbacks suppressed
+[ 7708.146840] [   T9116] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 6967, gen 0
+[ 7708.153113] [   T9116] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 6968, gen 0
+[ 7708.156166] [   T9116] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 6969, gen 0
+[ 7708.159124] [   T9116] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 6970, gen 0
+[ 7708.161950] [   T9116] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 6971, gen 0
+[ 7708.165931] [   T9116] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 6972, gen 0
+[ 7708.168810] [   T9116] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 6973, gen 0
+[ 7708.171797] [   T9116] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 6974, gen 0
+[ 7708.174864] [   T9116] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 6975, gen 0
+[ 7708.177947] [   T9116] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 6976, gen 0
+[ 7709.424983] [   T9110] btrfs_print_data_csum_error: 8600 callbacks suppressed
+[ 7709.425006] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 24050 off 483328 csum 0x8941f998 expected csum 0x9cc68739 mirror 2
+[ 7709.425672] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 24050 off 458752 csum 0x8941f998 expected csum 0x7a4ba9b6 mirror 3
+[ 7709.426179] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 24050 off 393216 csum 0x8941f998 expected csum 0xc6c7429a mirror 3
+[ 7709.426903] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 24050 off 462848 csum 0x8941f998 expected csum 0x36ffba54 mirror 3
+[ 7709.428064] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 24050 off 397312 csum 0x8941f998 expected csum 0x6065f4ea mirror 3
+[ 7709.429193] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 24050 off 401408 csum 0x8941f998 expected csum 0x4b57e402 mirror 3
+[ 7709.431611] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 24050 off 471040 csum 0x8941f998 expected csum 0xc0ebce1f mirror 3
+[ 7709.435901] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 24050 off 409600 csum 0x8941f998 expected csum 0x295cecbd mirror 3
+[ 7709.436124] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 24050 off 405504 csum 0x8941f998 expected csum 0xd3fe0d59 mirror 3
+[ 7709.436499] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 24050 off 466944 csum 0x8941f998 expected csum 0x096e72b7 mirror 3
+[ 7713.163704] [   T9116] btrfs_dev_stat_inc_and_print: 1174 callbacks suppressed
+[ 7713.163712] [   T9116] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 8458, gen 0
+[ 7713.164313] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7314, gen 0
+[ 7713.164501] [   T9116] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 8459, gen 0
+[ 7713.165527] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7315, gen 0
+[ 7713.166106] [   T9116] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 8460, gen 0
+[ 7713.167591] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7316, gen 0
+[ 7713.167642] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7317, gen 0
+[ 7713.167684] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7318, gen 0
+[ 7713.167717] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7319, gen 0
+[ 7713.167751] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7320, gen 0
+[ 7715.203310] [   T9112] btrfs_print_data_csum_error: 8639 callbacks suppressed
+[ 7715.203315] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 25495 off 196608 csum 0x8941f998 expected csum 0x95bb3ad1 mirror 1
+[ 7715.203318] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 25495 off 131072 csum 0x8941f998 expected csum 0xefa57ceb mirror 1
+[ 7715.203400] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 25495 off 135168 csum 0x8941f998 expected csum 0xe8b8ed7c mirror 1
+[ 7715.203918] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 25495 off 200704 csum 0x8941f998 expected csum 0xeaf71bce mirror 1
+[ 7715.204989] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 25495 off 139264 csum 0x8941f998 expected csum 0xbba399cb mirror 1
+[ 7715.205673] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 25495 off 204800 csum 0x8941f998 expected csum 0xde15ac0a mirror 1
+[ 7715.205752] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 25495 off 208896 csum 0x8941f998 expected csum 0x765b92f0 mirror 1
+[ 7715.205793] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 25495 off 212992 csum 0x8941f998 expected csum 0x22353255 mirror 1
+[ 7715.205831] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 25495 off 217088 csum 0x8941f998 expected csum 0x984b27ac mirror 1
+[ 7715.205870] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 25495 off 221184 csum 0x8941f998 expected csum 0xbdc2dedd mirror 1
+[ 7718.179810] [   T9111] btrfs_dev_stat_inc_and_print: 841 callbacks suppressed
+[ 7718.179820] [   T9111] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7436, gen 0
+[ 7718.184860] [   T9111] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7437, gen 0
+[ 7718.188054] [   T9111] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7438, gen 0
+[ 7718.192309] [   T9111] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7439, gen 0
+[ 7718.195600] [   T9111] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7440, gen 0
+[ 7718.199304] [   T9111] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7441, gen 0
+[ 7718.202462] [   T9111] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7442, gen 0
+[ 7718.205219] [   T9111] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7443, gen 0
+[ 7718.715113] [   T9096] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 7796, gen 0
+[ 7718.715118] [   T9112] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 8618, gen 0
+[ 7720.203565] [   T9110] btrfs_print_data_csum_error: 8571 callbacks suppressed
+[ 7720.203573] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 26472 off 217088 csum 0x8941f998 expected csum 0x6a85e14f mirror 4
+[ 7720.204093] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 26472 off 221184 csum 0x8941f998 expected csum 0x88efcb5d mirror 4
+[ 7720.204488] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 26472 off 225280 csum 0x8941f998 expected csum 0x85be27fc mirror 4
+[ 7720.205136] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 26472 off 229376 csum 0x8941f998 expected csum 0x30aaad8b mirror 4
+[ 7720.205748] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 26472 off 233472 csum 0x8941f998 expected csum 0x66430f30 mirror 4
+[ 7720.205978] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 26472 off 237568 csum 0x8941f998 expected csum 0xf39b03ba mirror 4
+[ 7720.206534] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 26472 off 241664 csum 0x8941f998 expected csum 0xd2b3df37 mirror 4
+[ 7720.207052] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 26472 off 245760 csum 0x8941f998 expected csum 0xb2d2e243 mirror 4
+[ 7720.207953] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 26472 off 249856 csum 0x8941f998 expected csum 0x034aa1c0 mirror 4
+[ 7720.209719] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 26472 off 253952 csum 0x8941f998 expected csum 0x1282e594 mirror 4
+[ 7723.201419] [   T9112] btrfs_dev_stat_inc_and_print: 1102 callbacks suppressed
+[ 7723.201436] [   T9112] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 8324, gen 0
+[ 7723.208670] [   T9112] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 8325, gen 0
+[ 7723.211598] [   T9112] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 8326, gen 0
+[ 7723.214561] [   T9112] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 8327, gen 0
+[ 7723.217420] [   T9112] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 8328, gen 0
+[ 7723.220127] [   T9112] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 8329, gen 0
+[ 7723.224277] [   T9112] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 8330, gen 0
+[ 7723.227073] [   T9112] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 8331, gen 0
+[ 7723.230133] [   T9112] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 8332, gen 0
+[ 7723.233208] [   T9112] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 8333, gen 0
+[ 7725.204610] [   T9106] btrfs_print_data_csum_error: 9826 callbacks suppressed
+[ 7725.204619] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 26884 off 458752 csum 0x8941f998 expected csum 0x3d24c763 mirror 2
+[ 7725.204884] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 26884 off 462848 csum 0x8941f998 expected csum 0x373a85f7 mirror 2
+[ 7725.205289] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 26884 off 397312 csum 0x8941f998 expected csum 0xa0094b6a mirror 2
+[ 7725.205575] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 26884 off 466944 csum 0x8941f998 expected csum 0xfbb42d6c mirror 2
+[ 7725.205897] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 26884 off 401408 csum 0x8941f998 expected csum 0x27730b2c mirror 2
+[ 7725.206521] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 26884 off 471040 csum 0x8941f998 expected csum 0x440e8e8b mirror 2
+[ 7725.206853] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 26884 off 405504 csum 0x8941f998 expected csum 0xba3284ec mirror 2
+[ 7725.207199] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 26884 off 475136 csum 0x8941f998 expected csum 0x4d478223 mirror 2
+[ 7725.207520] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 26884 off 409600 csum 0x8941f998 expected csum 0x48300522 mirror 2
+[ 7725.207904] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 26884 off 479232 csum 0x8941f998 expected csum 0x6c0daa6b mirror 2
+[ 7728.205846] [   T9096] btrfs_dev_stat_inc_and_print: 1270 callbacks suppressed
+[ 7728.205853] [   T9096] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11401, gen 0
+[ 7728.211157] [   T9096] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11402, gen 0
+[ 7728.214710] [   T9096] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11403, gen 0
+[ 7728.217676] [   T9096] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11404, gen 0
+[ 7728.220289] [   T9096] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11405, gen 0
+[ 7728.223404] [   T9096] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11406, gen 0
+[ 7728.227076] [   T9096] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11407, gen 0
+[ 7728.230045] [   T9096] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11408, gen 0
+[ 7728.233541] [   T9096] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11409, gen 0
+[ 7728.238114] [   T9096] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11410, gen 0
+[ 7730.205529] [   T9111] btrfs_print_data_csum_error: 9354 callbacks suppressed
+[ 7730.205538] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 282624 csum 0x8941f998 expected csum 0x411c7920 mirror 4
+[ 7730.206049] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 286720 csum 0x8941f998 expected csum 0x545b3295 mirror 4
+[ 7730.206945] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 290816 csum 0x8941f998 expected csum 0xf65db2f0 mirror 4
+[ 7730.207493] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 294912 csum 0x8941f998 expected csum 0x2d680e6d mirror 4
+[ 7730.208665] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 299008 csum 0x8941f998 expected csum 0xcaf2a38d mirror 4
+[ 7730.209457] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 303104 csum 0x8941f998 expected csum 0x8023f91b mirror 4
+[ 7730.210678] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 307200 csum 0x8941f998 expected csum 0x252a5b52 mirror 4
+[ 7730.211256] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 311296 csum 0x8941f998 expected csum 0xa653d2b5 mirror 4
+[ 7730.212102] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 315392 csum 0x8941f998 expected csum 0x8f324a5c mirror 4
+[ 7730.212661] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 319488 csum 0x8941f998 expected csum 0x3361ac1b mirror 4
+[ 7733.253991] [   T9092] btrfs_dev_stat_inc_and_print: 1254 callbacks suppressed
+[ 7733.253993] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 4550, gen 0
+[ 7733.254082] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 4551, gen 0
+[ 7733.254122] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 4552, gen 0
+[ 7733.254131] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 8548, gen 0
+[ 7733.254972] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 4553, gen 0
+[ 7733.255679] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 8549, gen 0
+[ 7733.256448] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 4554, gen 0
+[ 7733.257083] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 8550, gen 0
+[ 7733.257834] [   T9116] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 4555, gen 0
+[ 7733.258618] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 8551, gen 0
+[ 7735.206534] [   T9034] btrfs_print_data_csum_error: 10840 callbacks suppressed
+[ 7735.206541] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 421888 csum 0x8941f998 expected csum 0xe92364dd mirror 1
+[ 7735.206681] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 393216 csum 0x8941f998 expected csum 0x72e7b9e0 mirror 2
+[ 7735.206922] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 458752 csum 0x8941f998 expected csum 0x030a9494 mirror 2
+[ 7735.207176] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 425984 csum 0x8941f998 expected csum 0x884b8f42 mirror 1
+[ 7735.207507] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 397312 csum 0x8941f998 expected csum 0x36e2bb5e mirror 2
+[ 7735.208291] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 462848 csum 0x8941f998 expected csum 0xd4a80f76 mirror 2
+[ 7735.208626] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 466944 csum 0x8941f998 expected csum 0xf534db1e mirror 2
+[ 7735.209077] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 401408 csum 0x8941f998 expected csum 0x29941760 mirror 2
+[ 7735.209114] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 430080 csum 0x8941f998 expected csum 0xabc64c86 mirror 1
+[ 7735.209188] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 27457 off 434176 csum 0x8941f998 expected csum 0x2879abcb mirror 1
+[ 7738.263120] [   T9110] btrfs_dev_stat_inc_and_print: 1318 callbacks suppressed
+[ 7738.263127] [   T9110] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11577, gen 0
+[ 7738.267939] [   T9110] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11578, gen 0
+[ 7738.270619] [   T9110] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11579, gen 0
+[ 7738.273361] [   T9110] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11580, gen 0
+[ 7738.278260] [   T9110] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11581, gen 0
+[ 7738.281823] [   T9110] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11582, gen 0
+[ 7738.285448] [   T9110] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11583, gen 0
+[ 7738.290765] [   T9110] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11584, gen 0
+[ 7738.294384] [   T9110] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11585, gen 0
+[ 7738.298264] [   T9110] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 11586, gen 0
+[ 7740.714928] [   T9106] btrfs_print_data_csum_error: 9695 callbacks suppressed
+[ 7740.714938] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 28751 off 131072 csum 0x8941f998 expected csum 0x8eb9f205 mirror 1
+[ 7740.714939] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 28751 off 196608 csum 0x8941f998 expected csum 0xc343cfb2 mirror 1
+[ 7740.715005] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 28751 off 200704 csum 0x8941f998 expected csum 0x0785f215 mirror 1
+[ 7740.715653] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 28751 off 135168 csum 0x8941f998 expected csum 0x4957a5bd mirror 1
+[ 7740.715677] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 28751 off 196608 csum 0x8941f998 expected csum 0xc343cfb2 mirror 2
+[ 7740.716162] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 28751 off 131072 csum 0x8941f998 expected csum 0x8eb9f205 mirror 2
+[ 7740.716470] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 28751 off 204800 csum 0x8941f998 expected csum 0x7df3ec27 mirror 1
+[ 7740.716708] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 28751 off 196608 csum 0x8941f998 expected csum 0xc343cfb2 mirror 3
+[ 7740.717301] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 28751 off 139264 csum 0x8941f998 expected csum 0xda361bcb mirror 1
+[ 7740.717469] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 28751 off 200704 csum 0x8941f998 expected csum 0x0785f215 mirror 2
+[ 7743.338006] [   T9106] btrfs_dev_stat_inc_and_print: 998 callbacks suppressed
+[ 7743.338015] [   T9106] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 5158, gen 0
+[ 7743.343957] [   T9106] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 5159, gen 0
+[ 7743.347062] [   T9106] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 5160, gen 0
+[ 7743.350079] [   T9106] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 5161, gen 0
+[ 7743.353000] [   T9106] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 5162, gen 0
+[ 7743.358913] [   T9106] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 5163, gen 0
+[ 7743.361963] [   T9106] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 5164, gen 0
+[ 7743.364861] [   T9106] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 5165, gen 0
+[ 7743.367872] [   T9106] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 5166, gen 0
+[ 7743.372186] [   T9106] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 5167, gen 0
+[ 7745.715648] [   T9116] btrfs_print_data_csum_error: 10117 callbacks suppressed
+[ 7745.715656] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 29315 off 421888 csum 0x8941f998 expected csum 0xbdfee29c mirror 5
+[ 7745.716222] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 29315 off 491520 csum 0x8941f998 expected csum 0xc97925ac mirror 5
+[ 7745.716996] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 29315 off 425984 csum 0x8941f998 expected csum 0x8266c7d8 mirror 5
+[ 7745.717643] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 29315 off 495616 csum 0x8941f998 expected csum 0x576e8515 mirror 5
+[ 7745.718092] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 29315 off 430080 csum 0x8941f998 expected csum 0xf5ba5c04 mirror 5
+[ 7745.719079] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 29315 off 499712 csum 0x8941f998 expected csum 0x4c5650ac mirror 5
+[ 7745.719614] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 29315 off 434176 csum 0x8941f998 expected csum 0x8d3fc9c5 mirror 5
+[ 7745.719998] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 29315 off 503808 csum 0x8941f998 expected csum 0xd3e8dc07 mirror 5
+[ 7745.722177] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 29315 off 438272 csum 0x8941f998 expected csum 0xef1348f1 mirror 5
+[ 7745.722585] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 29315 off 507904 csum 0x8941f998 expected csum 0x4c23423e mirror 5
+[ 7748.418743] [   T9111] btrfs_dev_stat_inc_and_print: 1366 callbacks suppressed
+[ 7748.418752] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 9866, gen 0
+[ 7748.418781] [   T9110] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12169, gen 0
+[ 7748.419436] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 9867, gen 0
+[ 7748.420211] [   T9110] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12170, gen 0
+[ 7748.421063] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 9868, gen 0
+[ 7748.421878] [   T9110] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12171, gen 0
+[ 7748.423105] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 9869, gen 0
+[ 7748.423928] [   T9110] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12172, gen 0
+[ 7748.424510] [   T9111] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 9870, gen 0
+[ 7748.425243] [   T9110] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12173, gen 0
+[ 7750.716557] [   T9096] btrfs_print_data_csum_error: 9596 callbacks suppressed
+[ 7750.716566] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 29919 off 217088 csum 0x8941f998 expected csum 0xf2bbc9ba mirror 2
+[ 7750.716853] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 29919 off 221184 csum 0x8941f998 expected csum 0x1cfe2762 mirror 2
+[ 7750.717265] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 29919 off 225280 csum 0x8941f998 expected csum 0x4fedd259 mirror 2
+[ 7750.717635] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 29919 off 229376 csum 0x8941f998 expected csum 0x7e911dd2 mirror 2
+[ 7750.718013] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 29919 off 233472 csum 0x8941f998 expected csum 0x109038f4 mirror 2
+[ 7750.718287] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 29919 off 237568 csum 0x8941f998 expected csum 0xde68cc53 mirror 2
+[ 7750.718680] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 29919 off 241664 csum 0x8941f998 expected csum 0x03b8e240 mirror 2
+[ 7750.719240] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 29919 off 245760 csum 0x8941f998 expected csum 0x95c69f66 mirror 2
+[ 7750.719615] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 29919 off 249856 csum 0x8941f998 expected csum 0x64162563 mirror 2
+[ 7750.720478] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 29919 off 253952 csum 0x8941f998 expected csum 0xea1dc851 mirror 2
+[ 7754.335404] [   T9111] btrfs_dev_stat_inc_and_print: 694 callbacks suppressed
+[ 7754.335413] [   T9111] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12249, gen 0
+[ 7754.336581] [   T9116] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 7807, gen 0
+[ 7754.336590] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 8778, gen 0
+[ 7754.336655] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7988, gen 0
+[ 7754.336682] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 8779, gen 0
+[ 7754.336725] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7989, gen 0
+[ 7754.336726] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 8780, gen 0
+[ 7754.336757] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 8781, gen 0
+[ 7754.336765] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 7990, gen 0
+[ 7754.336787] [   T9096] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 8782, gen 0
+[ 7755.717676] [   T9110] btrfs_print_data_csum_error: 4859 callbacks suppressed
+[ 7755.717683] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 32927 off 368640 csum 0x8941f998 expected csum 0xae436be8 mirror 2
+[ 7755.719405] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 32927 off 372736 csum 0x8941f998 expected csum 0xfae448aa mirror 2
+[ 7755.719802] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 32927 off 376832 csum 0x8941f998 expected csum 0x5e0cc319 mirror 2
+[ 7755.720467] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 32927 off 380928 csum 0x8941f998 expected csum 0x3d079ec0 mirror 2
+[ 7755.721026] [   T5992] BTRFS warning (device loop8): csum failed root 257 ino 32927 off 385024 csum 0x8941f998 expected csum 0x099f68ce mirror 2
+[ 7755.721426] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 32927 off 389120 csum 0x8941f998 expected csum 0xf27f28e7 mirror 2
+[ 7755.721675] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 32927 off 327680 csum 0x8941f998 expected csum 0x9e597594 mirror 3
+[ 7755.722066] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 32927 off 331776 csum 0x8941f998 expected csum 0xfdb34f5d mirror 3
+[ 7755.722453] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 32927 off 335872 csum 0x8941f998 expected csum 0xcc2c088f mirror 3
+[ 7755.723119] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 32927 off 339968 csum 0x8941f998 expected csum 0x276f8682 mirror 3
+[ 7759.421057] [   T9034] btrfs_dev_stat_inc_and_print: 1302 callbacks suppressed
+[ 7759.421065] [   T9034] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 9162, gen 0
+[ 7759.421606] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 8372, gen 0
+[ 7759.422899] [   T9034] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 9163, gen 0
+[ 7759.423678] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 8373, gen 0
+[ 7759.424446] [   T9034] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 9164, gen 0
+[ 7759.425219] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 8374, gen 0
+[ 7759.426014] [   T9034] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 9165, gen 0
+[ 7759.426753] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 8375, gen 0
+[ 7759.427520] [   T9034] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 9166, gen 0
+[ 7759.428235] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 8376, gen 0
+[ 7765.474043] [   T9034] btrfs_print_data_csum_error: 9692 callbacks suppressed
+[ 7765.474052] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 38619 off 49152 csum 0x8941f998 expected csum 0x4c129a2e mirror 1
+[ 7765.481320] [   T9034] btrfs_dev_stat_inc_and_print: 278 callbacks suppressed
+[ 7765.481326] [   T9034] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12521, gen 0
+[ 7765.489419] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 38619 off 53248 csum 0x8941f998 expected csum 0xe17d6785 mirror 1
+[ 7765.490412] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 38619 off 49152 csum 0x8941f998 expected csum 0x4c129a2e mirror 2
+[ 7765.493136] [   T9034] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12522, gen 0
+[ 7765.493241] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 38619 off 57344 csum 0x8941f998 expected csum 0x3c4cd191 mirror 1
+[ 7765.494829] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 38619 off 53248 csum 0x8941f998 expected csum 0xe17d6785 mirror 2
+[ 7765.494897] [   T9034] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12523, gen 0
+[ 7765.495254] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 38619 off 49152 csum 0x8941f998 expected csum 0x4c129a2e mirror 3
+[ 7765.498281] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 38619 off 49152 csum 0x8941f998 expected csum 0x4c129a2e mirror 4
+[ 7765.498974] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 38619 off 53248 csum 0x8941f998 expected csum 0xe17d6785 mirror 3
+[ 7765.499525] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 38619 off 53248 csum 0x8941f998 expected csum 0xe17d6785 mirror 4
+[ 7765.500081] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 38619 off 53248 csum 0x8941f998 expected csum 0xe17d6785 mirror 5
+[ 7765.500679] [   T9034] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12524, gen 0
+[ 7765.550791] [   T9112] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12525, gen 0
+[ 7765.553711] [   T9112] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12526, gen 0
+[ 7765.556637] [   T9112] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12527, gen 0
+[ 7765.559739] [   T9112] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12528, gen 0
+[ 7765.572561] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12529, gen 0
+[ 7765.575559] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12530, gen 0
+[ 7771.198571] [   T9119] btrfs_print_data_csum_error: 4782 callbacks suppressed
+[ 7771.198792] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 42316 off 81920 csum 0x8941f998 expected csum 0x77ee4ae9 mirror 1
+[ 7771.198812] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 42316 off 86016 csum 0x8941f998 expected csum 0x2a808f43 mirror 1
+[ 7771.198825] [   T7877] btrfs_dev_stat_inc_and_print: 589 callbacks suppressed
+[ 7771.198842] [   T7877] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 9946, gen 0
+[ 7771.198934] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 42316 off 90112 csum 0x8941f998 expected csum 0x19b4db76 mirror 1
+[ 7771.198940] [   T7877] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 9947, gen 0
+[ 7771.198973] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 42316 off 94208 csum 0x8941f998 expected csum 0x8881194c mirror 1
+[ 7771.198977] [   T7877] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 9948, gen 0
+[ 7771.199008] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 42316 off 98304 csum 0x8941f998 expected csum 0xd55f5c7d mirror 1
+[ 7771.199012] [   T7877] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 9949, gen 0
+[ 7771.199050] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 42316 off 102400 csum 0x8941f998 expected csum 0xffee1cb8 mirror 1
+[ 7771.199055] [   T7877] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 9950, gen 0
+[ 7771.199086] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 42316 off 106496 csum 0x8941f998 expected csum 0x768ce040 mirror 1
+[ 7771.199092] [   T7877] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 9951, gen 0
+[ 7771.199120] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 42316 off 110592 csum 0x8941f998 expected csum 0x225343ab mirror 1
+[ 7771.199124] [   T7877] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 9952, gen 0
+[ 7771.199156] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 42316 off 114688 csum 0x8941f998 expected csum 0x61d53f49 mirror 1
+[ 7771.199161] [   T7877] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 9953, gen 0
+[ 7771.199192] [   T7877] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 9954, gen 0
+[ 7771.199218] [   T9119] BTRFS warning (device loop8): csum failed root 257 ino 42316 off 20480 csum 0x8941f998 expected csum 0xbabe3ea0 mirror 1
+[ 7771.199231] [   T9119] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 9140, gen 0
+[ 7776.199277] [   T9110] btrfs_print_data_csum_error: 9474 callbacks suppressed
+[ 7776.199286] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 42614 off 434176 csum 0x8941f998 expected csum 0x5ccd33bd mirror 7
+[ 7776.199762] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 42614 off 499712 csum 0x8941f998 expected csum 0xd6e5f5c7 mirror 7
+[ 7776.200522] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 42614 off 438272 csum 0x8941f998 expected csum 0x0d164245 mirror 7
+[ 7776.202384] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 42614 off 503808 csum 0x8941f998 expected csum 0xf40b05cd mirror 7
+[ 7776.203088] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 42614 off 442368 csum 0x8941f998 expected csum 0x145f449f mirror 7
+[ 7776.204041] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 42614 off 507904 csum 0x8941f998 expected csum 0xd1ac498c mirror 7
+[ 7776.204654] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 42614 off 446464 csum 0x8941f998 expected csum 0xe076d295 mirror 7
+[ 7776.205144] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 42614 off 512000 csum 0x8941f998 expected csum 0x50d7466f mirror 7
+[ 7776.205593] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 42614 off 450560 csum 0x8941f998 expected csum 0x9b84cf13 mirror 7
+[ 7776.206424] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 42614 off 516096 csum 0x8941f998 expected csum 0x9e3fb140 mirror 7
+[ 7776.252540] [   T9112] btrfs_dev_stat_inc_and_print: 1181 callbacks suppressed
+[ 7776.252553] [   T9112] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12816, gen 0
+[ 7776.252572] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 8319, gen 0
+[ 7776.252683] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 8320, gen 0
+[ 7776.253283] [   T9112] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12817, gen 0
+[ 7776.255812] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 8321, gen 0
+[ 7776.257114] [   T9112] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12818, gen 0
+[ 7776.257683] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 8322, gen 0
+[ 7776.259084] [   T9112] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12819, gen 0
+[ 7776.259777] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 8323, gen 0
+[ 7776.260565] [   T9112] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 12820, gen 0
+[ 7781.199858] [   T9034] btrfs_print_data_csum_error: 8225 callbacks suppressed
+[ 7781.199867] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 43813 off 389120 csum 0x8941f998 expected csum 0xe50f00c3 mirror 8
+[ 7781.207049] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 43813 off 327680 csum 0x8941f998 expected csum 0xa13161fc mirror 1
+[ 7781.210723] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 43813 off 331776 csum 0x8941f998 expected csum 0xbc17cfe3 mirror 1
+[ 7781.212844] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 43813 off 327680 csum 0x8941f998 expected csum 0xa13161fc mirror 2
+[ 7781.215757] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 43813 off 335872 csum 0x8941f998 expected csum 0x25b79b13 mirror 1
+[ 7781.216388] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 43813 off 331776 csum 0x8941f998 expected csum 0xbc17cfe3 mirror 2
+[ 7781.216652] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 43813 off 339968 csum 0x8941f998 expected csum 0x54e1378b mirror 1
+[ 7781.218115] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 43813 off 327680 csum 0x8941f998 expected csum 0xa13161fc mirror 3
+[ 7781.218591] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 43813 off 344064 csum 0x8941f998 expected csum 0xd4025a47 mirror 1
+[ 7781.219112] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 43813 off 335872 csum 0x8941f998 expected csum 0x25b79b13 mirror 2
+[ 7781.285117] [   T7877] btrfs_dev_stat_inc_and_print: 1030 callbacks suppressed
+[ 7781.285128] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 8948, gen 0
+[ 7781.289889] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 8949, gen 0
+[ 7781.292432] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 8950, gen 0
+[ 7781.296223] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 8951, gen 0
+[ 7781.300238] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 8952, gen 0
+[ 7781.303438] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 8953, gen 0
+[ 7781.306725] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 8954, gen 0
+[ 7781.309845] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 8955, gen 0
+[ 7781.312870] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 8956, gen 0
+[ 7781.316408] [   T7877] BTRFS error (device loop8): bdev /dev/loop10 errs: wr 0, rd 0, flush 0, corrupt 8957, gen 0
+[ 7786.201400] [   T9034] btrfs_print_data_csum_error: 10020 callbacks suppressed
+[ 7786.201409] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 44132 off 483328 csum 0x8941f998 expected csum 0x6e176607 mirror 2
+[ 7786.201774] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 44132 off 421888 csum 0x8941f998 expected csum 0x08ea32b0 mirror 2
+[ 7786.202085] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 44132 off 487424 csum 0x8941f998 expected csum 0x2e536288 mirror 2
+[ 7786.202532] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 44132 off 425984 csum 0x8941f998 expected csum 0xa9205184 mirror 2
+[ 7786.202838] [   T9119] BTRFS warning (device loop8): csum failed root 257 ino 44132 off 491520 csum 0x8941f998 expected csum 0xbae38270 mirror 2
+[ 7786.203400] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 44132 off 430080 csum 0x8941f998 expected csum 0x09d3a894 mirror 2
+[ 7786.203826] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 44132 off 495616 csum 0x8941f998 expected csum 0x6b73c50e mirror 2
+[ 7786.204286] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 44132 off 434176 csum 0x8941f998 expected csum 0x1c4fb553 mirror 2
+[ 7786.204750] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 44132 off 499712 csum 0x8941f998 expected csum 0xc99c6725 mirror 2
+[ 7786.205251] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 44132 off 438272 csum 0x8941f998 expected csum 0xd0b80de1 mirror 2
+[ 7786.336260] [   T9096] btrfs_dev_stat_inc_and_print: 1254 callbacks suppressed
+[ 7786.336269] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 8671, gen 0
+[ 7786.336669] [   T9034] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 9642, gen 0
+[ 7786.336956] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 8672, gen 0
+[ 7786.339385] [   T9034] BTRFS error (device loop8): bdev /dev/loop9 errs: wr 0, rd 0, flush 0, corrupt 9643, gen 0
+[ 7786.340054] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 8673, gen 0
+[ 7786.340088] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 8674, gen 0
+[ 7786.340128] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 8675, gen 0
+[ 7786.340166] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 8676, gen 0
+[ 7786.340200] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 8677, gen 0
+[ 7786.340230] [   T9096] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 8678, gen 0
+[ 7792.662370] [   T9116] btrfs_print_data_csum_error: 7625 callbacks suppressed
+[ 7792.662379] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 262144 csum 0x8941f998 expected csum 0xd758b20c mirror 1
+[ 7792.662830] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 327680 csum 0x8941f998 expected csum 0x6e8be708 mirror 1
+[ 7792.662845] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 458752 csum 0x8941f998 expected csum 0xbfc2366b mirror 1
+[ 7792.662845] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 393216 csum 0x8941f998 expected csum 0xa57a3997 mirror 1
+[ 7792.662852] [   T9034] btrfs_dev_stat_inc_and_print: 918 callbacks suppressed
+[ 7792.662854] [   T9034] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 9135, gen 0
+[ 7792.662855] [   T9106] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 13104, gen 0
+[ 7792.662922] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 462848 csum 0x8941f998 expected csum 0x5ea80f19 mirror 1
+[ 7792.662925] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 397312 csum 0x8941f998 expected csum 0xe1b39934 mirror 1
+[ 7792.662926] [   T9034] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 9136, gen 0
+[ 7792.662930] [   T9106] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 13105, gen 0
+[ 7792.662956] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 466944 csum 0x8941f998 expected csum 0xf34dd7d5 mirror 1
+[ 7792.662960] [   T9034] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 9137, gen 0
+[ 7792.662963] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 401408 csum 0x8941f998 expected csum 0xa257cc20 mirror 1
+[ 7792.662976] [   T9106] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 13106, gen 0
+[ 7792.663023] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 9492, gen 0
+[ 7792.663024] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 471040 csum 0x8941f998 expected csum 0xd0fc5530 mirror 1
+[ 7792.663036] [   T9034] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 9138, gen 0
+[ 7792.663082] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 266240 csum 0x8941f998 expected csum 0x778392e9 mirror 1
+[ 7792.663087] [   T9116] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 9493, gen 0
+[ 7792.663097] [   T9034] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 9139, gen 0
+[ 7797.663007] [   T9111] btrfs_print_data_csum_error: 10648 callbacks suppressed
+[ 7797.663015] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 462848 csum 0x8941f998 expected csum 0x5ea80f19 mirror 6
+[ 7797.663539] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 397312 csum 0x8941f998 expected csum 0xe1b39934 mirror 6
+[ 7797.664388] [   T9119] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 466944 csum 0x8941f998 expected csum 0xf34dd7d5 mirror 6
+[ 7797.664768] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 401408 csum 0x8941f998 expected csum 0xa257cc20 mirror 6
+[ 7797.665224] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 471040 csum 0x8941f998 expected csum 0xd0fc5530 mirror 6
+[ 7797.665644] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 405504 csum 0x8941f998 expected csum 0xe3748105 mirror 6
+[ 7797.665947] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 409600 csum 0x8941f998 expected csum 0x47ded7ca mirror 6
+[ 7797.666430] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 475136 csum 0x8941f998 expected csum 0xde19c126 mirror 6
+[ 7797.666923] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 413696 csum 0x8941f998 expected csum 0x3dca87ac mirror 6
+[ 7797.667913] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 47387 off 479232 csum 0x8941f998 expected csum 0x014a2db9 mirror 6
+[ 7797.714415] [   T9116] btrfs_dev_stat_inc_and_print: 1334 callbacks suppressed
+[ 7797.714421] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 13504, gen 0
+[ 7797.714427] [   T9119] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 9535, gen 0
+[ 7797.714989] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 13505, gen 0
+[ 7797.715990] [   T9119] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 9536, gen 0
+[ 7797.716925] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 13506, gen 0
+[ 7797.718010] [   T9119] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 9537, gen 0
+[ 7797.718467] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 13507, gen 0
+[ 7797.719213] [   T9119] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 9538, gen 0
+[ 7797.720337] [   T9116] BTRFS error (device loop8): bdev /dev/loop8 errs: wr 0, rd 0, flush 0, corrupt 13508, gen 0
+[ 7797.720766] [   T9119] BTRFS error (device loop8): bdev /dev/loop11 errs: wr 0, rd 0, flush 0, corrupt 9539, gen 0
+[ 7802.664259] [   T9110] btrfs_print_data_csum_error: 8064 callbacks suppressed
+[ 7802.664267] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 48689 off 483328 csum 0x8941f998 expected csum 0xb5a1e3cd mirror 2
+[ 7802.664895] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 48689 off 417792 csum 0x8941f998 expected csum 0xb146104d mirror 2
+[ 7802.665384] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 48689 off 487424 csum 0x8941f998 expected csum 0xcc509e55 mirror 2
+[ 7802.666086] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 48689 off 421888 csum 0x8941f998 expected csum 0xd482e291 mirror 2
+[ 7802.667591] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 48689 off 491520 csum 0x8941f998 expected csum 0xc23a7049 mirror 2
+[ 7802.668050] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 48689 off 425984 csum 0x8941f998 expected csum 0x041c4c31 mirror 2
+[ 7802.668354] [   T9112] BTRFS warning (device loop8): csum failed root 257 ino 48689 off 495616 csum 0x8941f998 expected csum 0x3367406c mirror 2
+[ 7802.668924] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 48689 off 430080 csum 0x8941f998 expected csum 0x2ab3fea4 mirror 2
+[ 7802.669254] [   T7877] BTRFS warning (device loop8): csum failed root 257 ino 48689 off 499712 csum 0x8941f998 expected csum 0x744087e1 mirror 2
+[ 7802.670139] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 48689 off 434176 csum 0x8941f998 expected csum 0x8ebeadd8 mirror 2
+[ 7802.777065] [   T9111] btrfs_dev_stat_inc_and_print: 1014 callbacks suppressed
+[ 7802.777074] [   T9111] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 6598, gen 0
+[ 7802.777113] [   T9110] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10148, gen 0
+[ 7802.777628] [   T9111] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 6599, gen 0
+[ 7802.778344] [   T9110] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10149, gen 0
+[ 7802.779028] [   T9111] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 6600, gen 0
+[ 7802.779848] [   T9110] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10150, gen 0
+[ 7802.780533] [   T9111] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 6601, gen 0
+[ 7802.781817] [   T9110] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10151, gen 0
+[ 7802.782422] [   T9111] BTRFS error (device loop8): bdev /dev/loop12 errs: wr 0, rd 0, flush 0, corrupt 6602, gen 0
+[ 7802.783175] [   T9110] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10152, gen 0
+[ 7807.664878] [   T9092] btrfs_print_data_csum_error: 9706 callbacks suppressed
+[ 7807.664890] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 49032 off 393216 csum 0x8941f998 expected csum 0x032b1d25 mirror 2
+[ 7807.665427] [   T9119] BTRFS warning (device loop8): csum failed root 257 ino 49032 off 458752 csum 0x8941f998 expected csum 0x6632ad05 mirror 2
+[ 7807.665858] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 49032 off 397312 csum 0x8941f998 expected csum 0xff5103cf mirror 2
+[ 7807.666252] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 49032 off 462848 csum 0x8941f998 expected csum 0x0a9bf60f mirror 2
+[ 7807.666573] [   T9034] BTRFS warning (device loop8): csum failed root 257 ino 49032 off 401408 csum 0x8941f998 expected csum 0xd29cc92c mirror 2
+[ 7807.666939] [   T9106] BTRFS warning (device loop8): csum failed root 257 ino 49032 off 405504 csum 0x8941f998 expected csum 0xd461143f mirror 2
+[ 7807.667583] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 49032 off 466944 csum 0x8941f998 expected csum 0x9ba02fe0 mirror 2
+[ 7807.668012] [   T9116] BTRFS warning (device loop8): csum failed root 257 ino 49032 off 409600 csum 0x8941f998 expected csum 0x568dfe80 mirror 2
+[ 7807.668737] [   T9096] BTRFS warning (device loop8): csum failed root 257 ino 49032 off 471040 csum 0x8941f998 expected csum 0x6aa207e8 mirror 2
+[ 7807.669014] [   T9111] BTRFS warning (device loop8): csum failed root 257 ino 49032 off 413696 csum 0x8941f998 expected csum 0xbb5b5bf4 mirror 2
+[ 7807.796939] [   T9111] btrfs_dev_stat_inc_and_print: 1206 callbacks suppressed
+[ 7807.796947] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10484, gen 0
+[ 7807.797677] [   T9092] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 10769, gen 0
+[ 7807.799206] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10485, gen 0
+[ 7807.799967] [   T9092] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 10770, gen 0
+[ 7807.800701] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10486, gen 0
+[ 7807.801519] [   T9092] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 10771, gen 0
+[ 7807.802257] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10487, gen 0
+[ 7807.802980] [   T9092] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 10772, gen 0
+[ 7807.803753] [   T9111] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10488, gen 0
+[ 7807.804532] [   T9092] BTRFS error (device loop8): bdev /dev/loop15 errs: wr 0, rd 0, flush 0, corrupt 10773, gen 0
+[ 7815.911002] [   T9110] btrfs_print_data_csum_error: 5590 callbacks suppressed
+[ 7815.911012] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 54349 off 0 csum 0x8941f998 expected csum 0x1ccc273a mirror 1
+[ 7815.916797] [   T9110] btrfs_dev_stat_inc_and_print: 662 callbacks suppressed
+[ 7815.916804] [   T9110] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10820, gen 0
+[ 7815.922496] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 54349 off 0 csum 0x8941f998 expected csum 0x1ccc273a mirror 2
+[ 7815.927506] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 54349 off 0 csum 0x8941f998 expected csum 0x1ccc273a mirror 3
+[ 7815.932058] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 54349 off 0 csum 0x8941f998 expected csum 0x1ccc273a mirror 4
+[ 7815.935629] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 54349 off 0 csum 0x8941f998 expected csum 0x1ccc273a mirror 1
+[ 7815.938684] [   T9110] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10821, gen 0
+[ 7815.941989] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 54349 off 0 csum 0x8941f998 expected csum 0x1ccc273a mirror 2
+[ 7815.946486] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 54349 off 0 csum 0x8941f998 expected csum 0x1ccc273a mirror 3
+[ 7815.949846] [   T9110] BTRFS warning (device loop8): csum failed root 257 ino 54349 off 0 csum 0x8941f998 expected csum 0x1ccc273a mirror 4
+[ 7817.277366] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 55694 off 475136 csum 0x8941f998 expected csum 0x8949d4ed mirror 1
+[ 7817.281081] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10822, gen 0
+[ 7817.284263] [   T9092] BTRFS warning (device loop8): csum failed root 257 ino 55694 off 479232 csum 0x8941f998 expected csum 0xcd6126ec mirror 1
+[ 7817.289068] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10823, gen 0
+[ 7817.292060] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10824, gen 0
+[ 7817.296933] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10825, gen 0
+[ 7817.300078] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10826, gen 0
+[ 7817.303271] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10827, gen 0
+[ 7817.306993] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10828, gen 0
+[ 7817.310449] [   T9092] BTRFS error (device loop8): bdev /dev/loop14 errs: wr 0, rd 0, flush 0, corrupt 10829, gen 0
+[ 7821.996024] [   T9563] BTRFS info (device loop8): last unmount of filesystem ed90a27f-278a-4bc7-a992-7a962a85e158

diff --git a/covers/forensics/balance-zerofill-2026-08-07/balance-reclaim6-115.log b/covers/forensics/balance-zerofill-2026-08-07/balance-reclaim6-115.log
new file mode 100644 (file)
index 0000000..58ad4f3
--- /dev/null
+++ b/covers/forensics/balance-zerofill-2026-08-07/balance-reclaim6-115.log
@@ -0,0 +1,53 @@
+################ legacy (opts='none') ################
+WARNING: RAID5/6 support has known problems is strongly discouraged
+        to be used besides testing or evaluation.
+
+WARNING: metadata has lower redundancy than data!
+
+--- reserve headroom: shrink every device by 1g
+--- tree a: fill to ENOSPC, delete half
+tree a: wrote 28308 files (3561.0 MiB), deleted 14109 (1777.6 MiB)
+--- before balance: df-avail 1778 MiB, stripe_unusable 0 MiB (a deleted 1777 MiB)
+--- release headroom: grow every device back to max
+--- data balance
+OK: balance completed: Done, had to relocate 6 out of 8 chunks
+--- after balance: df-avail 7922 MiB, stripe_unusable 0 MiB
+OK: stripe_unusable collapsed (0 -> 0 MiB)
+--- tree b: fill to ENOSPC into the reclaimed space
+tree b: wrote 63373 files (7921.7 MiB), deleted 31595 (3951.8 MiB)
+--- b wrote 7921 MiB of the 1777 MiB a deleted
+OK: reclaimed space is usable (>= 60%)
+tree a verify: ok=456550 eio=0 zero=0 wrong=0 missing=0 short=0
+OK: tree a intact through balance and refill
+tree b verify: ok=1016305 eio=0 zero=0 wrong=0 missing=0 short=0
+OK: tree b intact
+
+RESULT[legacy]: PASS
+################ stripe_alloc (opts='stripe_alloc') ################
+WARNING: RAID5/6 support has known problems is strongly discouraged
+        to be used besides testing or evaluation.
+
+WARNING: metadata has lower redundancy than data!
+
+--- reserve headroom: shrink every device by 1g
+--- tree a: fill to ENOSPC, delete half
+tree a: wrote 28009 files (3524.5 MiB), deleted 13948 (1757.7 MiB)
+--- before balance: df-avail 994 MiB, stripe_unusable 800 MiB (a deleted 1757 MiB)
+--- release headroom: grow every device back to max
+--- data balance
+FAIL: balance failed: ERROR: error during balancing '/mnt/wh/balance-reclaim/mnt': Input/output error There may be more info in syslog - try dmesg | tail 
+--- after balance: df-avail 7131 MiB, stripe_unusable 807 MiB
+FAIL: stripe_unusable still 807 MiB after balance
+--- tree b: fill to ENOSPC into the reclaimed space
+tree b: wrote 55699 files (6975.0 MiB), deleted 27772 (3489.0 MiB)
+--- b wrote 6975 MiB of the 1757 MiB a deleted
+OK: reclaimed space is usable (>= 60%)
+tree a verify: ok=450987 eio=1328 zero=0 wrong=0 missing=0 short=0
+FAIL: tree a intact through balance and refill
+tree b verify: ok=890087 eio=2328 zero=0 wrong=0 missing=0 short=0
+FAIL: tree b intact
+
+RESULT[stripe_alloc]: FAIL
+
+BALANCE_RECLAIM_RC=1
+rc=1

diff --git a/covers/forensics/balance-zerofill-2026-08-07/balance-stripe_alloc.txt b/covers/forensics/balance-zerofill-2026-08-07/balance-stripe_alloc.txt
new file mode 100644 (file)
index 0000000..dd60728
--- /dev/null
+++ b/covers/forensics/balance-zerofill-2026-08-07/balance-stripe_alloc.txt
@@ -0,0 +1,2 @@
+ERROR: error during balancing '/mnt/wh/balance-reclaim/mnt': Input/output error
+There may be more info in syslog - try dmesg | tail

diff --git a/covers/forensics/balance-zerofill-2026-08-07/damage-map.txt b/covers/forensics/balance-zerofill-2026-08-07/damage-map.txt
new file mode 100644 (file)
index 0000000..d67a8d3
--- /dev/null
+++ b/covers/forensics/balance-zerofill-2026-08-07/damage-map.txt
@@ -0,0 +1,83 @@
+patched
+raid6 data chunks: [(298844160, 1127350272), (1426194432, 704643072), (2130837504, 704643072), (2835480576, 552468480), (3387949056, 125829120), (4033871872, 1509949440), (5543821312, 1509949440), (7053770752, 1509949440), (8563720192, 1509949440), (10073669632, 402653184), (10476322816, 385875968), (10862198784, 134217728)]
+csum entries: 1344730
+
+DAMAGED SECTORS: 2945
+DAMAGED ROWS: 77
+chunk 298844160 row   558 logical    518258688 cols {0: 16, 1: 16, 2: 16, 3: 1} parity_ok=True
+chunk 298844160 row   659 logical    557973504 cols {0: 16, 1: 6} parity_ok=True
+chunk 298844160 row  1520 logical    896532480 cols {0: 3} parity_ok=True
+chunk 298844160 row  1705 logical    969277440 cols {0: 16, 1: 13} parity_ok=True
+chunk 298844160 row  1937 logical   1060503552 cols {0: 2} parity_ok=True
+chunk 298844160 row  1986 logical   1079771136 cols {0: 16, 1: 8} parity_ok=True
+chunk 298844160 row  1995 logical   1083310080 cols {0: 13} parity_ok=True
+chunk 298844160 row  2006 logical   1087635456 cols {0: 8} parity_ok=True
+chunk 298844160 row  2132 logical   1137180672 cols {0: 9} parity_ok=True
+chunk 1426194432 row   527 logical   1633419264 cols {0: 16, 1: 16} parity_ok=True
+chunk 1426194432 row   617 logical   1668808704 cols {0: 16, 1: 16} parity_ok=True
+chunk 1426194432 row   679 logical   1693188096 cols {0: 16, 1: 16} parity_ok=True
+chunk 1426194432 row   690 logical   1697513472 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 1426194432 row   756 logical   1723465728 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 1426194432 row   789 logical   1736441856 cols {0: 16, 1: 16} parity_ok=True
+chunk 1426194432 row   908 logical   1783234560 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 1426194432 row  1092 logical   1855586304 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 1426194432 row  1264 logical   1923219456 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 2130837504 row    71 logical   2158755840 cols {0: 16, 1: 16} parity_ok=True
+chunk 2130837504 row   548 logical   2346319872 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 2130837504 row   685 logical   2400190464 cols {0: 16, 1: 16} parity_ok=True
+chunk 2130837504 row   892 logical   2481586176 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 2130837504 row  1055 logical   2545680384 cols {0: 16, 1: 16} parity_ok=True
+chunk 2835480576 row   272 logical   2942435328 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 2835480576 row   381 logical   2985295872 cols {0: 16, 1: 16} parity_ok=True
+chunk 2835480576 row   836 logical   3164209152 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 2835480576 row   962 logical   3213754368 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 2835480576 row   995 logical   3226730496 cols {0: 16, 1: 14} parity_ok=True
+chunk 2835480576 row  1001 logical   3229089792 cols {0: 16, 1: 16} parity_ok=True
+chunk 4033871872 row   678 logical   4300472320 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 4033871872 row   718 logical   4316200960 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 4033871872 row   850 logical   4368105472 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 4033871872 row   946 logical   4405854208 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 4033871872 row  1178 logical   4497080320 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 4033871872 row  1242 logical   4522246144 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 4033871872 row  1695 logical   4700372992 cols {0: 16, 1: 16} parity_ok=True
+chunk 4033871872 row  2341 logical   4954390528 cols {0: 16, 1: 16} parity_ok=True
+chunk 4033871872 row  2800 logical   5134876672 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 4033871872 row  2835 logical   5148639232 cols {0: 16, 1: 16} parity_ok=True
+chunk 5543821312 row   154 logical   5604376576 cols {0: 12} parity_ok=True
+chunk 5543821312 row   266 logical   5648416768 cols {0: 3} parity_ok=True
+chunk 5543821312 row   284 logical   5655494656 cols {0: 16} parity_ok=True
+chunk 5543821312 row   362 logical   5686165504 cols {0: 4} parity_ok=True
+chunk 5543821312 row   596 logical   5778178048 cols {0: 15} parity_ok=True
+chunk 5543821312 row   661 logical   5803737088 cols {0: 5} parity_ok=True
+chunk 5543821312 row   704 logical   5820645376 cols {0: 16, 1: 2} parity_ok=True
+chunk 5543821312 row   852 logical   5878841344 cols {0: 16, 1: 15} parity_ok=True
+chunk 5543821312 row   931 logical   5909905408 cols {0: 13} parity_ok=True
+chunk 5543821312 row  1230 logical   6027476992 cols {0: 11} parity_ok=True
+chunk 5543821312 row  1704 logical   6213861376 cols {0: 13} parity_ok=True
+chunk 5543821312 row  1797 logical   6250430464 cols {0: 8} parity_ok=True
+chunk 5543821312 row  1839 logical   6266945536 cols {0: 10} parity_ok=True
+chunk 5543821312 row  2876 logical   6674710528 cols {0: 4} parity_ok=True
+chunk 7053770752 row    11 logical   7058096128 cols {0: 16, 1: 16} parity_ok=True
+chunk 7053770752 row    42 logical   7070285824 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 7053770752 row   496 logical   7248805888 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 7053770752 row   900 logical   7407665152 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 7053770752 row  1012 logical   7451705344 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 7053770752 row  1339 logical   7580286976 cols {0: 16, 1: 16} parity_ok=True
+chunk 7053770752 row  1520 logical   7651459072 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 7053770752 row  1548 logical   7662469120 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 7053770752 row  1906 logical   7803240448 cols {0: 16, 1: 16} parity_ok=True
+chunk 7053770752 row  2162 logical   7903903744 cols {0: 16, 1: 16} parity_ok=True
+chunk 7053770752 row  2265 logical   7944404992 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 7053770752 row  2324 logical   7967604736 cols {0: 16, 1: 16} parity_ok=True
+chunk 7053770752 row  2415 logical   8003387392 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 7053770752 row  2432 logical   8010072064 cols {0: 16, 1: 16} parity_ok=True
+chunk 7053770752 row  2436 logical   8011644928 cols {0: 16, 1: 16} parity_ok=True
+chunk 7053770752 row  2750 logical   8135114752 cols {0: 16, 1: 16} parity_ok=True
+chunk 8563720192 row     4 logical   8565293056 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 8563720192 row  1983 logical   9343467520 cols {0: 16, 1: 16} parity_ok=True
+chunk 8563720192 row  2402 logical   9508225024 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 8563720192 row  2710 logical   9629335552 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 8563720192 row  2781 logical   9657253888 cols {0: 16, 1: 16} parity_ok=True
+chunk 10073669632 row    81 logical  10105520128 cols {0: 16, 1: 16} parity_ok=True
+chunk 10073669632 row   160 logical  10136584192 cols {0: 16, 1: 16, 2: 16, 3: 16} parity_ok=True
+chunk 10476322816 row  1349 logical  10653138944 cols {1: 1} parity_ok=True
\ No newline at end of file

diff --git a/covers/forensics/balance-zerofill-2026-08-07/gen-correlation.txt b/covers/forensics/balance-zerofill-2026-08-07/gen-correlation.txt
new file mode 100644 (file)
index 0000000..9edadba
--- /dev/null
+++ b/covers/forensics/balance-zerofill-2026-08-07/gen-correlation.txt
@@ -0,0 +1,30 @@
+chunk 5543821312 row 931: head ext (5909827584, 131072, 41, '14923') | tail ext None | DIFF(41->-1)
+chunk 5543821312 row 1230: head ext (6027390976, 131072, 41, '18621') | tail ext (6027530240, 32768, 41, '18624') | SAME
+chunk 5543821312 row 1704: head ext (6213783552, 131072, 41, '24403') | tail ext None | DIFF(41->-1)
+chunk 5543821312 row 1797: head ext (6250397696, 65536, 41, '25500') | tail ext (6250463232, 65536, 41, '25501') | SAME
+chunk 5543821312 row 1839: head ext (6266855424, 131072, 41, '25959') | tail ext None | DIFF(41->-1)
+chunk 5543821312 row 2876: head ext (6674661376, 65536, 42, '38619') | tail ext (6674726912, 65536, 42, '38620') | SAME
+chunk 7053770752 row 11: head ext (7057702912, 524288, 41, '17835') | tail ext (7058227200, 262144, 41, '17837') | SAME
+chunk 7053770752 row 42: head ext (7070023680, 524288, 41, '17952') | tail ext None | DIFF(41->-1)
+chunk 7053770752 row 496: head ext (7248543744, 524288, 41, '19797') | tail ext None | DIFF(41->-1)
+chunk 7053770752 row 900: head ext (7407403008, 524288, 41, '21417') | tail ext (7407927296, 524288, 41, '21428') | SAME
+chunk 7053770752 row 1012: head ext (7451443200, 524288, 41, '21891') | tail ext None | DIFF(41->-1)
+chunk 7053770752 row 1339: head ext (7580155904, 262144, 41, '23232') | tail ext (7580418048, 262144, 41, '23239') | SAME
+chunk 7053770752 row 1520: head ext (7651196928, 524288, 41, '23926') | tail ext (7651721216, 262144, 41, '23941') | SAME
+chunk 7053770752 row 1548: head ext (7662206976, 524288, 41, '24050') | tail ext None | DIFF(41->-1)
+chunk 7053770752 row 1906: head ext (7803109376, 262144, 41, '25495') | tail ext (7803371520, 524288, 41, '25508') | SAME
+chunk 7053770752 row 2162: head ext (7903772672, 262144, 41, '26472') | tail ext None | DIFF(41->-1)
+chunk 7053770752 row 2265: head ext (7944142848, 524288, 41, '26884') | tail ext (7944667136, 262144, 41, '26892') | SAME
+chunk 7053770752 row 2324: head ext (7967473664, 262144, 41, '27122') | tail ext (7967735808, 524288, 41, '27135') | SAME
+chunk 7053770752 row 2415: head ext (8003125248, 524288, 42, '27457') | tail ext None | DIFF(42->-1)
+chunk 7053770752 row 2432: head ext (8009940992, 262144, 42, '27560') | tail ext None | DIFF(42->-1)
+chunk 7053770752 row 2436: head ext (8011513856, 262144, 42, '27580') | tail ext (8011776000, 524288, 42, '27585') | SAME
+chunk 7053770752 row 2750: head ext (8134983680, 262144, 42, '28751') | tail ext (8135245824, 524288, 42, '28756') | SAME
+chunk 8563720192 row 4: head ext (8565030912, 524288, 42, '32927') | tail ext None | DIFF(42->-1)
+chunk 8563720192 row 1983: head ext (9343336448, 262144, 43, '40881') | tail ext None | DIFF(43->-1)
+chunk 8563720192 row 2402: head ext (9507962880, 524288, 43, '42614') | tail ext (9508487168, 524288, 43, '42617') | SAME
+chunk 8563720192 row 2710: head ext (9629073408, 524288, 43, '43813') | tail ext None | DIFF(43->-1)
+chunk 8563720192 row 2781: head ext (9656860672, 524288, 43, '44132') | tail ext None | DIFF(43->-1)
+chunk 10073669632 row 81: head ext (10105126912, 524288, 43, '48689') | tail ext None | DIFF(43->-1)
+chunk 10073669632 row 160: head ext (10136322048, 524288, 43, '49032') | tail ext None | DIFF(43->-1)
+Counter({'SAME': 39, 'DIFF(17->-1)': 12, 'DIFF(40->-1)': 8, 'DIFF(41->-1)': 8, 'DIFF(43->-1)': 5, 'DIFF(42->-1)': 3, 'DIFF(18->-1)': 1})
\ No newline at end of file

diff --git a/covers/forensics/balance-zerofill-2026-08-07/gencorr.py b/covers/forensics/balance-zerofill-2026-08-07/gencorr.py
new file mode 100644 (file)
index 0000000..8deae65
--- /dev/null
+++ b/covers/forensics/balance-zerofill-2026-08-07/gencorr.py
@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+# Correlate damaged rows with extent generations/owners.
+rows = [
+(298844160,558,4),(298844160,659,2),(298844160,1520,1),(298844160,1705,2),
+(298844160,1937,1),(298844160,1986,2),(298844160,1995,1),(298844160,2006,1),
+(298844160,2132,1),
+(1426194432,527,2),(1426194432,617,2),(1426194432,679,2),(1426194432,690,4),
+(1426194432,756,4),(1426194432,789,2),(1426194432,908,4),(1426194432,1092,4),
+(1426194432,1264,4),
+(2130837504,71,2),(2130837504,548,4),(2130837504,685,2),(2130837504,892,4),
+(2130837504,1055,2),
+(2835480576,272,4),(2835480576,381,2),(2835480576,836,4),(2835480576,962,4),
+(2835480576,995,2),(2835480576,1001,2),
+(4033871872,678,4),(4033871872,718,4),(4033871872,850,4),(4033871872,946,4),
+(4033871872,1178,4),(4033871872,1242,4),(4033871872,1695,2),(4033871872,2341,2),
+(4033871872,2800,4),(4033871872,2835,2),
+(5543821312,154,1),(5543821312,266,1),(5543821312,284,1),(5543821312,362,1),
+(5543821312,596,1),(5543821312,661,1),(5543821312,704,2),(5543821312,852,2),
+(5543821312,931,1),(5543821312,1230,1),(5543821312,1704,1),(5543821312,1797,1),
+(5543821312,1839,1),(5543821312,2876,1),
+(7053770752,11,2),(7053770752,42,4),(7053770752,496,4),(7053770752,900,4),
+(7053770752,1012,4),(7053770752,1339,2),(7053770752,1520,4),(7053770752,1548,4),
+(7053770752,1906,2),(7053770752,2162,2),(7053770752,2265,4),(7053770752,2324,2),
+(7053770752,2415,4),(7053770752,2432,2),(7053770752,2436,2),(7053770752,2750,2),
+(8563720192,4,4),(8563720192,1983,2),(8563720192,2402,4),(8563720192,2710,4),
+(8563720192,2781,2),
+(10073669632,81,2),(10073669632,160,4),
+]
+SL=65536
+ext=[]
+for line in open("/tmp/extmap.txt"):
+    p=line.split()
+    ext.append((int(p[0]),int(p[1]),int(p[2]),p[3] if len(p)>3 else "?"))
+ext.sort()
+import bisect
+keys=[e[0] for e in ext]
+def find(logical):
+    i=bisect.bisect_right(keys,logical)-1
+    if i>=0:
+        s,l,g,o=ext[i]
+        if s<=logical<s+l: return ext[i]
+    return None
+from collections import Counter
+patt=Counter()
+for clog,row,ncols in rows:
+    head=clog+row*6*SL
+    dmg_end=head+ncols*SL
+    e1=find(head)
+    e2=find(dmg_end)  # first surviving col start
+    g1=e1[2] if e1 else -1
+    g2=e2[2] if e2 else -1
+    o1=e1[3] if e1 else "?"
+    o2=e2[3] if e2 else "?"
+    same="SAME" if g1==g2 else f"DIFF({g1}->{g2})"
+    patt[same]+=1
+    print(f"chunk {clog} row {row}: head ext {e1} | tail ext {e2} | {same}")
+print(patt)

diff --git a/covers/forensics/balance-zerofill-2026-08-07/padrepro.sh b/covers/forensics/balance-zerofill-2026-08-07/padrepro.sh
new file mode 100644 (file)
index 0000000..cb33bbd
--- /dev/null
+++ b/covers/forensics/balance-zerofill-2026-08-07/padrepro.sh
@@ -0,0 +1,88 @@
+#!/bin/bash
+# Fill-only repro of the balance-reclaim zero-fill bug with allocator/pad
+# tracing.  Runs the tree-a fill (the phase the damage dates to), verifies,
+# and leaves the trace + images for offline correlation.
+set -ue
+. /root/harness/common.sh
+
+BASE=/mnt/wh/padrepro
+MNT=$BASE/mnt
+T=/sys/kernel/tracing
+ORACLE=/root/harness/rolling-oracle.py
+PROFILE=${PR_PROFILE:-raid6}
+SEED=${PR_SEED:-1}
+FILES=${PR_FILES:-100000}
+
+mkdir -p "$BASE" "$MNT"
+umount "$MNT" 2>/dev/null || true
+if [ -f "$BASE/loops" ]; then
+       while read -r dev; do losetup -d "$dev" 2>/dev/null || true
+       done < "$BASE/loops"
+fi
+: > "$BASE/loops"
+devs=()
+for i in 0 1 2 3 4 5 6 7; do
+       img="$BASE/pr$i.img"
+       rm -f "$img"
+       if [ "$i" -lt 4 ]; then
+               truncate -s 1536M "$img"
+               wh_poison_img "$img" 1536 "pr-$SEED" "$i"
+       else
+               truncate -s 2048M "$img"
+               wh_poison_img "$img" 2048 "pr-$SEED" "$i"
+       fi
+       dev=$(losetup -f --show "$img")
+       echo "$dev" >> "$BASE/loops"
+       devs+=("$dev")
+done
+
+mkfs.btrfs -f -K -d "$PROFILE" -m raid1 "${devs[@]}" >/dev/null
+
+# --- tracing setup ---
+echo 0 > "$T/tracing_on"
+echo > "$T/trace"
+echo > "$T/kprobe_events" 2>/dev/null || true
+cat >> "$T/kprobe_events" <<'EOF'
+p:kp/padmask btrfs_stripe_run_pad_mask stripe_start=%si:u64 stripe_len=%dx:u64
+r:kp/padmask_ret btrfs_stripe_run_pad_mask ret=$retval
+p:kp/abandon btrfs_open_stripe_write_abandoned start=%si:u64 len=%dx:u64
+p:kp/wdone btrfs_open_stripe_write_done start=%si:u64 len=%dx:u64
+EOF
+echo 1 > "$T/events/kp/enable"
+echo 1 > "$T/events/btrfs/btrfs_reserve_extent/enable"
+echo 1 > "$T/events/btrfs/raid56_write/enable" 2>/dev/null || true
+cat "$T/trace_pipe" > "$BASE/trace.out" &
+TRPID=$!
+echo 1 > "$T/tracing_on"
+
+mount -o "nodiscard,stripe_alloc" "${devs[0]}" "$MNT"
+for devid in 1 2 3 4 5 6 7 8; do
+       btrfs filesystem resize "$devid:-1g" "$MNT" >/dev/null
+done
+
+echo "--- tree a: fill to ENOSPC"
+btrfs subvolume create "$MNT/a" >/dev/null
+python3 "$ORACLE" write --mnt "$MNT" --tree a --seed "$SEED" --files "$FILES" \
+       | tee "$BASE/write.out"
+NF=$(awk -F= '/^NFILES=/ {print $2}' "$BASE/write.out")
+btrfs filesystem sync "$MNT"
+sync
+echo 3 > /proc/sys/vm/drop_caches
+
+echo "--- verify tree a (nfiles=$NF)"
+rcv=0
+python3 "$ORACLE" verify --mnt "$MNT" --tree a --seed "$SEED" --files "$NF" \
+       --expect all-correct || rcv=$?
+echo "VERIFY_RC=$rcv"
+
+umount "$MNT"
+echo 0 > "$T/tracing_on"
+sleep 2
+kill $TRPID 2>/dev/null || true
+wait $TRPID 2>/dev/null || true
+echo 0 > "$T/events/kp/enable"
+echo 0 > "$T/events/btrfs/btrfs_reserve_extent/enable"
+echo 0 > "$T/events/btrfs/raid56_write/enable" 2>/dev/null || true
+echo > "$T/kprobe_events" 2>/dev/null || true
+wc -l "$BASE/trace.out"
+echo "PADREPRO_RC=$rcv"

diff --git a/covers/forensics/balance-zerofill-2026-08-07/zfscan.py b/covers/forensics/balance-zerofill-2026-08-07/zfscan.py
new file mode 100644 (file)
index 0000000..cdff59e
--- /dev/null
+++ b/covers/forensics/balance-zerofill-2026-08-07/zfscan.py
@@ -0,0 +1,108 @@
+#!/usr/bin/env python3
+# Scan the preserved raid6 array for zero-filled live sectors.
+# Damage = 4K sector that is all-zeros on disk but has a csum-tree entry
+# whose value is not crc32c(zeros) (0x8941f998 in stored byte order).
+import subprocess, re, sys, struct
+from collections import defaultdict
+
+BASE = "/mnt/wh/evidence-balance-zerofill/"
+DEV = "/dev/loop8"
+IMG = {1:"br0.img",2:"br1.img",3:"br2.img",4:"br3.img",5:"br4.img",6:"br5.img",7:"br6.img",8:"br7.img"}
+SL = 65536
+SEC = 4096
+ZERO_CSUM = 0x8941f998  # stored byte order as dump-tree prints it
+
+def dump(args):
+    return subprocess.run(["btrfs","inspect-internal","dump-tree"]+args+[DEV],
+                          capture_output=True, text=True).stdout
+
+# ---- chunk map: raid6 data chunks ----
+chunks = []  # (logical, length, [ (devid, dev_off) x8 ])
+cur = None
+for line in dump(["-t","chunk"]).splitlines():
+    m = re.search(r"key \(FIRST_CHUNK_TREE CHUNK_ITEM (\d+)\)", line)
+    if m:
+        cur = None; logical = int(m.group(1)); continue
+    m = re.search(r"length (\d+) owner \d+ stripe_len (\d+) type (\S+)", line)
+    if m:
+        if "RAID6" in m.group(3) and "DATA" in m.group(3):
+            cur = (logical, int(m.group(1)), [])
+            chunks.append(cur)
+        else:
+            cur = None
+        continue
+    m = re.search(r"stripe (\d+) devid (\d+) offset (\d+)", line)
+    if m and cur is not None:
+        cur[2].append((int(m.group(2)), int(m.group(3))))
+
+print(f"raid6 data chunks: {[(c[0],c[1]) for c in chunks]}", flush=True)
+
+# ---- csum map ----
+csum = {}  # logical -> stored csum (int)
+loglines = dump(["-t","csum","--csum-items"]).splitlines()
+start = None; off = 0
+for line in loglines:
+    m = re.search(r"key \(EXTENT_CSUM EXTENT_CSUM (\d+)\) itemoff", line)
+    if m:
+        start = int(m.group(1)); off = 0; continue
+    if start is not None:
+        vals = re.findall(r"0x([0-9a-f]{8})", line)
+        if vals and ("itemoff" not in line):
+            for v in vals:
+                csum[start + off] = int(v, 16)
+                off += SEC
+print(f"csum entries: {len(csum)}", flush=True)
+if not csum:
+    print("NO CSUMS PARSED - dump format mismatch; sample lines:")
+    for l in loglines[:40]: print(l)
+    sys.exit(1)
+
+files = {d: open(BASE+IMG[d], "rb") for d in IMG}
+Z = bytes(SEC)
+
+damage = []  # (chunk_logical, row, col, logical, expected_csum)
+rows_damaged = defaultdict(set)
+
+for clog, clen, stripes in chunks:
+    nstr = len(stripes)
+    ndata = nstr - 2
+    nrows = clen // (SL*nstr)
+    for row in range(nrows):
+        rot = row % nstr
+        for col in range(ndata):
+            slot = (rot + col) % nstr
+            devid, doff = stripes[slot]
+            f = files[devid]
+            f.seek(doff + row*SL)
+            data = f.read(SL)
+            base_logical = clog + (row*ndata + col)*SL
+            for s in range(SL//SEC):
+                logical = base_logical + s*SEC
+                exp = csum.get(logical)
+                if exp is None or exp == ZERO_CSUM:
+                    continue
+                if data[s*SEC:(s+1)*SEC] == Z:
+                    damage.append((clog, row, col, logical, exp))
+                    rows_damaged[(clog,row)].add(col)
+
+print(f"\nDAMAGED SECTORS: {len(damage)}")
+print(f"DAMAGED ROWS: {len(rows_damaged)}")
+# per-row summary with parity check
+summary = []
+for (clog,row), cols in sorted(rows_damaged.items()):
+    _,_,stripes = next(c for c in chunks if c[0]==clog)
+    nstr = len(stripes); ndata = nstr - 2
+    rot = row % nstr
+    dslots = [(rot+i)%nstr for i in range(ndata)]
+    P = (rot+ndata)%nstr
+    colsdat = []
+    for slot in dslots + [P]:
+        devid, doff = stripes[slot]
+        f = files[devid]; f.seek(doff + row*SL); colsdat.append(f.read(SL))
+    x = bytearray(SL)
+    for i in range(ndata):
+        d = colsdat[i]
+        for j in range(SL): x[j] ^= d[j]
+    pc = (bytes(x) == colsdat[ndata])
+    ncols = {c: sum(1 for d in damage if d[0]==clog and d[1]==row and d[2]==c) for c in sorted(cols)}
+    print(f"chunk {clog} row {row:5d} logical {clog+row*ndata*SL:>12d} cols {ncols} parity_ok={pc}")

diff --git a/covers/stripe-alloc.txt b/covers/stripe-alloc.txt
new file mode 100644 (file)
index 0000000..4a930f3
--- /dev/null
+++ b/covers/stripe-alloc.txt
@@ -0,0 +1,898 @@
+Subject: [RFC PATCH 0/39] btrfs: close the raid56 write hole for datacow with stripe-exclusive allocation
+
+This series closes the raid56 write hole for datacow data by changing the
+allocator, with no on-disk format change and no journal.  The same rule,
+applied at log commits, lets a crash with all devices present recover
+completed fsyncs intact, and bounds a degraded crash's fsync-window
+loss to detectable absence -- never silent, never damaging committed
+data (patches 14-16); patches 17-18 and 22-24 remove the latency and
+IO overheads this adds to fsync.  Patches 19-21 restore
+write-in-place for nodatacow files and preallocated extents as an
+opt-in policy, with the write hole those writes reintroduce provably
+confined to the writing file alone.  Patch 39 extends the same
+allocation rule to raid56 metadata, closing the write hole for tree
+blocks whenever the metadata profile is raid56.
+
+Relationship to the other mitigation strategies: the raid-stripe-tree
+addresses issues specific to zoned (ZNS) devices and remains the right
+tool there -- but this series may simplify the cases the stripe-tree
+work has to cope with, for example by eliminating mid-stripe update
+cases entirely.  Journalling in any form (a parity log, a raid1 metadata
+update journal) is a complementary function: it can add crash-safe
+write-in-place for nodatacow and preallocated files, which this series
+deliberately does not attempt.  By confining datacow writes to whole
+stripes, this series reduces and simplifies the work remaining for both.
+
+Patch roadmap
+=============
+
+Numbers may shift between revisions; titles are authoritative.
+
+Core allocator:
+   1  btrfs: add btrfs_claim_free_stripe_run() for stripe-exclusive allocation
+   2  btrfs: add open stripe run tracking for stripe-exclusive allocation
+   3  btrfs: add the stripe_alloc allocation policy for raid56 data
+   4  btrfs: report stripe run data IO through the ordered extent lifecycle
+   5  btrfs: retire stripe runs at commit and gate stripe_alloc
+   6  btrfs: add a write-hole invariant checker to the raid56 write path
+   7  btrfs: stripe_alloc: refuse space_cache=v1
+   8  btrfs: account stripe_alloc trapped free space for honest statfs
+
+Packing density:
+   9  btrfs: stripe_alloc: keep an open run per size band to trap less
+  10  btrfs: stripe_alloc: grow the frontier run instead of stranding its tail
+
+IO batching and robustness:
+  11  btrfs: raid56: batch stripe_alloc partial writes into full-stripe writes
+  12  btrfs: stripe_alloc: never claim stripes covered by a live run
+
+Interface:
+  13  btrfs: stripe_alloc: control the policy with a filesystem property
+
+fsync guarantee:
+  14  btrfs: stripe_alloc: settle a logged extent's stripes at log commit
+  15  btrfs: stripe_alloc: private per-inode stripe runs for log-active inodes
+  16  btrfs: stripe_alloc: carry an inode's log tail forward at fsync
+
+fsync latency:
+  17  btrfs: stripe_alloc: kick parked rbios before the fast fsync's writeback wait
+  18  btrfs: raid56: pad sub-stripe writes to full stripes in open runs
+
+nodatacow/prealloc write-in-place:
+  19  btrfs: stripe_alloc: isolate nodatacow and preallocated extents by stripe
+  20  btrfs: stripe_alloc: allow-rmw policy, and write-in-place for isolated nocow extents
+  21  btrfs: stripe_alloc: persist nocow runs across commits and remounts
+
+Parking edges and observability:
+  22  btrfs: raid56: do not park sync writes into nocow runs
+  23  btrfs: raid56: expose parking statistics in sysfs
+  24  btrfs: raid56: skip parking for sync rbios finished by their unplug batch
+
+Reservation integrity:
+  25  btrfs: stripe_alloc: count open stripe run remainders against data reservations
+  26  btrfs: stripe_alloc: pessimistic data reservation margin
+  27  btrfs: stripe_alloc: claim fully-free stripes that span free space entries
+
+Coverage observability:
+  28  btrfs: stripe_alloc: warn at mount when raid56 metadata is not covered
+  29  btrfs: stripe_alloc: report read-modify-write of uncovered stripes
+  30  btrfs: raid56: say whether a metadata read-modify-write is a write hole
+
+Parking refinement:
+  31  btrfs: stripe_alloc: tunable park deadlines, and say why padding declined
+  32  btrfs: stripe_alloc: trace why padding declined, at the moment it declined
+  33  btrfs: stripe_alloc: complete parked writes on allocation coverage, not clocks
+  34  btrfs: stripe_alloc: track per-sector liveness and pad from the map
+  35  btrfs: stripe_alloc: count claimable whole-stripe supply directly
+  36  btrfs: raid56: adaptive park deadline from the parked-rbio backlog
+
+Admission and allocation cost:
+  37  btrfs: stripe_alloc: gate data admission on claimable whole-stripe supply
+  38  btrfs: stripe_alloc: cache a failed stripe run scan per block group
+
+Metadata coverage:
+  39  btrfs: stripe_meta: allocate tree blocks by whole stripes
+
+Prerequisites
+=============
+
+These are not part of this series -- they are independent raid56 and
+error-handling fixes, sent separately -- but the series is developed and
+tested on top of them, and the guarantees below are stated with them
+applied:
+
+  btrfs: propagate a split bio's error when the failing split completes last
+      Required for "detectable, never silent".  Without it, a read of
+      BTRFS_STRIPE_LEN or more over an unrecoverable sector on a degraded
+      array returns zero-filled data and succeeds.  Fixes: d48e1dea3931.
+
+  btrfs: raid56: only verify recovered sectors that have a checksum
+      Required for degraded operation at all.  verify_one_sector()
+      checks rebuilt sectors against the stripe's csum array without
+      testing the per-sector csum bitmap, so a rebuilt sector that
+      legitimately has no csum -- free space, or the very sector a
+      sub-stripe write is replacing, whose csums are not yet in the
+      tree -- is compared against a zeroed slot and fails.  Sub-stripe
+      writes to a degraded raid5/6 then fail with EIO whenever the
+      missing device's column is only partially covered by csums, and
+      each failure silently drops the unwritten extent.  Found by this
+      series' degraded-write test on its first run; upstream since
+      v6.2 (Fixes: 7a3150723061).  stripe_alloc never RMWs and does
+      not itself need the fix, but the legacy baselines below do, and
+      so does any degraded array taking writes.
+
+  btrfs: raid56: fix use-after-free of rbio in bio end_io wakeups
+      A pre-existing raid56 UAF (a bare wait_event racing the bio-endio
+      wake_up against the rbio free), not caused by this series, but this
+      series keeps rbios alive across more waits and the soak loads below
+      hit it readily.  Every patched-kernel result quoted below was
+      produced with it applied.
+
+  btrfs: raid56: drop cached rbios when their stripes' extents are freed
+      A pre-existing latent-corruption window: nothing invalidates the
+      rbio stripe cache when extents are freed, so a later sub-stripe
+      write to reused stripes can steal all-uptodate pages holding the
+      stripe's previous life and generate parity from that memory
+      instead of the disk.  If the on-disk content diverged meanwhile
+      (silent device corruption of a column holding only freed data is
+      invisible -- no csum, nothing for scrub), the write bakes the
+      divergence into parity: reads pass, scrub is clean, and the loss
+      surfaces only when a device failure forces reconstruction.  Found
+      by this series' rolling-failure test as a deterministic
+      unreconstructible stripe and proven byte-exactly (the parity
+      solved uniquely as XOR including pre-corruption bytes that
+      existed nowhere on disk).  stripe_alloc additionally reorders its
+      padding check ahead of the cached-pages shortcut (patch 18), so a
+      claimed stripe's first partial write rewrites every column it
+      does not cover.
+
+  btrfs: don't abort raid56 data scrub on first uncorrectable sector
+      Not required by the series.  The harness scrubs deliberately damaged
+      filesystems, which stock scrub abandons at the first uncorrectable
+      stripe, so the verification below depends on it.
+
+  btrfs: log a message when dropping an extent due to IO error
+      Not required by the series; this is the patch referred to in "A
+      second failure mode" that makes the silent extent drop visible.
+
+  btrfs: raid56: verify reconstructed tree blocks
+      Reconstructed data sectors are csum-verified before use, but a
+      reconstructed tree block was returned to the reader unchecked:
+      nothing confirmed its csum, bytenr, fsid or generation before it
+      entered the metadata cache.  Adds the identity checks the normal
+      metadata read path performs.  Independent of this series; found
+      while extending the harness to raid56 metadata.
+
+  btrfs: do not write repaired read sectors back on a read-only mount
+      btrfs_end_repair_bio() write-backs every repaired sector with no
+      check of the mount state, tripping
+      ASSERT(!(sb->s_flags & SB_RDONLY)) in btrfs_repair_io_failure()
+      -- and without assertions it writes to a filesystem the user was
+      promised is read-only.  A degraded raid56 mounted ro,degraded
+      hits it on every stray-sector read, since reconstruction through
+      parity counts as a repair.  Found by the metadata crash matrix
+      below.
+
+The write hole
+==============
+
+A raid56 stripe becomes unrecoverable in degraded mode when data blocks and
+the parity block of one stripe are modified in different transactions: a
+crash during the second modification tears the stripe against parity that
+already reflects committed data from the first.  The classic RAID5 RMW hole.
+
+The core observation is that btrfs only tears a stripe this way because the
+allocator fills a partially used stripe across a transaction boundary.  If a
+full stripe only ever receives writes between two commits of one transaction,
+then either the transaction commits (data already on disk, valid in degraded
+mode) or it is reverted (the stripe is unreferenced and its contents do not
+matter).  Either way there is no hole.
+
+The approach
+============
+
+Add a data allocation policy ("stripe_alloc", raid56 data block groups
+only) that allocates strictly from "open stripe runs": contiguous,
+stripe-aligned regions of fully-free stripes, filled sequentially
+(patches 1-5).  A run stops accepting allocations when it is exhausted
+or at transaction commit, and a closed run is never reopened -- its
+unallocated tail returns to the free space cache where, being part of a
+partially filled stripe, it cannot be claimed again until the whole
+stripe frees.  No persistent state: the "fully free" claim rule
+excludes partially filled stripes statelessly, so retired stripes
+become unallocatable with nothing written to disk.
+
+Two allocator refinements keep the packing dense (patches 9-10).  Open
+runs are kept per power-of-two band of remaining space (segregated best
+fit), so a small write lands in an already-open, nearly full stripe
+instead of opening a fresh one; and when an allocation outgrows every
+open run, the frontier run grows to absorb the adjacent fully-free
+stripes it claims, placing the extent across the stripe boundary
+instead of stranding the run's tail.  Both preserve the claim rule -- a
+grown run's stripes were claimed fully free, and it still closes at
+commit and never reopens.
+
+The run guarantee also pays raid56 back at the IO layer.  Because the
+rest of an open run's stripe is written before the run closes or not at
+all, a partial write rbio for such a stripe can be parked -- stripe
+lock held, RMW not started -- collecting later writes through the
+existing merge path until it goes down as one full-stripe write: one
+parity computation, no reads (patch 11).  Parking is strictly
+edge-driven for anything with a waiter behind it: the fast fsync kicks
+the parked rbios covering its ordered extents before waiting for
+writeback (patch 17), sync writes skip parking entirely when their
+stripe belongs to a nodatacow file's private run (patch 22) or when
+their submission batch was already merged at unplug (patch 24), and a
+deadline (100ms, 3ms for sync writes) backstops the paths with no
+waiter at all.  A flushed partial write whose uncovered sectors all lie
+at or past its run's allocation frontier is zero-padded into a single
+full-stripe write -- no read phase, one parity pass; the zeros are
+physically written, so scrub stays consistent (patch 18).
+
+Invariants (stated so the design can be checked against them):
+
+  I1  Every extent in a full stripe was allocated within one open-run
+      lifetime; stripes are never rejoined after a commit closes them.
+  I2  No superblock referencing an extent in stripe S is written while any
+      write to S is in flight.
+  I3  No stripe contains extents of more than one allocation class
+      (cow, relocation, log-active inode, nodatacow inode).
+  I4  Every raid56 data allocation goes through the policy.
+
+At commit, every open run is closed and the commit waits for all data IO
+into those stripes to reach disk (I2).  This runs while the transaction
+still accepts joins, deliberately: the drain waits on data IO from tasks
+that may themselves need a join to make progress (a chunk allocation in
+the middle of a delalloc flush, for example), so retiring after joins
+stop would deadlock.  It is a pure data-IO wait, never an ordered-extent
+wait -- the latter needs a join too.
+
+A join that arrives between the retirement and the join barrier is safe
+by sequence numbering: the retirement atomically bumps a sequence and
+snapshots the run list under one lock, so any allocation made after it
+opens runs stamped with the new sequence.  An ordered extent backed by
+such a run detects the stamp and defers its file extent insertion to the
+next transaction.  The committing transaction therefore only ever
+references extents in stripes whose runs it retired and drained; writes
+from the join window land in stripes that belong, wholly, to the next
+window.  The result: no flushoncommit requirement, no format change, no
+allocator rwsem.
+
+The defer wait is itself a lock-ordering hazard, found the hard way: a
+production raid5 host (balance plus steady write load, btrfs over
+dm-crypt) deadlocked with the commit parked in the retirement drain and
+every btrfs-endio-write worker parked in the defer wait -- each still
+holding the extent lock its finish had taken before joining.  Buffered
+writers piled up on those locked ranges while holding their prepared
+locked folios, which stranded the flusher, kcompactd and page reclaim;
+kcryptd then could not allocate bounce pages for the very data bios the
+drain was waiting on, closing the cycle through the mm.  The defer wait
+therefore drops the range's extent lock (and the
+EXTENT_FINISHING_ORDERED tag taken with it) before sleeping, and
+re-takes both before re-joining.  The unlocked window is safe: the
+range is still covered by the pending ordered extent, so a writer that
+takes the lock finds the ordered extent, releases its folios and waits
+for it -- exactly the path that keeps writeback and reclaim flowing
+while the commit drains.
+
+Log commits get the same treatment at finer grain (patches 14-16).
+Before the log super is written, the log commit closes the open run
+covering every extent it logs and drains that stripe's data IO -- the
+log-window analogue of I2.  A closed run is never extended, so once
+fsync returns, no later write can RMW the stripes holding the logged
+extents.  So that one fsync-heavy inode does not keep closing runs it
+shares with other writers -- fragmenting their streams and trapping the
+shared tails -- a log-active inode (sticky, set at its first fsync)
+allocates from its own private runs (patch 15), and its log commits
+settle only its own stripes.  The stripe tail trapped per log commit is
+then reclaimed by carry-forward (patch 16): at each log commit the
+settling walk records which of the inode's logged extents sit in the
+closed run's final partial stripe, and the inode's next fsync
+re-dirties those ranges (the defrag pattern) so its delalloc flush COWs
+carried and new data together into the current run -- everything
+downstream is the ordinary COW pipeline, and the emptied partial stripe
+frees whole.  The private-run scoping makes this tractable: nobody else
+ever writes a log-active inode's stripes, and reflinked ranges just
+stay put (foreign referents keep the old extent alive in its sealed
+stripe).  Steady-state trapped space per fsync-active inode drops from
+one stripe tail per fsync to at most one partial stripe.
+
+In-place writes (nodatacow, and writes into preallocated extents) would
+reintroduce the hole for a whole stripe's worth of other files' committed
+data, so by default they are forced to COW while stripe_alloc is
+enabled.  The data relocation inode is exempt: its extents live in
+relocation-class runs that never share a stripe with other data (I3),
+and relocation depends on in-place writes.
+
+Patches 19-21 make the forced COW a policy rather than a hard rule.
+Nodatacow files' extents and preallocated extents are placed in private
+per-inode runs of their own class (patch 19), so they never share a
+stripe with any other file's data; with the allow-rmw policy enabled,
+an extent whose full stripes are provably owned by the writing inode
+alone (its own run, or the committed extent tree shows sole ownership)
+is written in place (patch 20).  Such a write can tear, on a degraded
+crash, only the writing file's own data -- which is the nodatacow
+contract, and no worse than stock raid5, where the same write endangers
+arbitrary neighbors.  Anything that fails the ownership test -- extents
+from before stripe isolation, reflinked or snapshotted extents,
+relocated extents -- stays force-COWed, and since the rewrite lands in
+the file's private run, the next overwrite of the same data passes:
+legacy nocow files migrate themselves to isolation in one COW
+generation.  The private runs persist across transaction commits
+(nothing in them needs invariant I2) and their partial-stripe tails are
+re-adopted after a remount, so a slowly appended nocow file packs
+sequentially instead of burning a stripe per commit (patch 21).
+
+Patch 39 extends the same rule to raid56 metadata.  When the metadata
+profile is raid56, tree blocks allocate from metadata-class stripe runs
+under the identical claim rule -- only fully-free stripes, filled
+forward, never revisited -- so no tree block write ever lands in a
+stripe holding committed blocks.  Metadata needs its own completion
+accounting (there is no ordered extent): the extent buffer write endio
+reports written blocks back to their run, and the two paths that
+discard a tree block that will never be written report it abandoned
+instead -- a block freed in the same transaction that allocated it
+(including when its delayed ref head was already processed, so the
+free completes through the delayed-ref machinery rather than
+btrfs_free_tree_block()'s own cleanup), and an unwritten log tree
+block discarded at log teardown, which bypasses
+btrfs_free_tree_block() entirely.  Miss either report and the run's
+inflight count never drains: the commit-time retirement stalls and the
+block group reference leaks.  Both paths were found by the crash
+matrix below -- its recovery mounts drive both routinely -- and the
+reports are part of the patch.  Runs of different classes never share
+a stripe, so data and metadata still never mix, and mixed
+data+metadata block groups are refused outright.  Metadata retirement
+is two-phase: runs stay open through the commit's own tree building
+and close only after every tree block the transaction allocated is on
+disk -- closing earlier would strand blocks the commit has not
+allocated yet, draining earlier would wait on writes it has not
+issued.  Coverage is driven purely by the block group profile:
+raid1c3/c4 metadata is simply untouched, and system chunks remain
+uncovered (patch 28 warns at mount; patches 29-30 report any
+uncovered read-modify-write and say whether it rewrote parity over
+committed tree blocks -- raid5 system chunks measurably take real
+write holes, and extending the rule to them is future work).
+
+Driving that retirement to saturation -- a workload of
+multi-hundred-item fsyncs keeps log tree IO in flight at every
+commit, where ordinary load only occasionally does -- exposed three
+defects in it, all fixed in patch 39.  First,
+the retirement wait was only ever woken when a run was freed, and
+metadata runs are not freed on drain (they are kept for padding and
+merging until the retirement collects them) -- so a run whose last
+block was reported through either discard path above never woke the
+waiter, and the retirement slept out its full timeout.  The fix
+wakes at the drain transition itself.  Second, retirement runs after
+the transaction unblocks, so the next transaction is already opening
+runs while it waits; counting those meant waiting on writes this
+commit never issued, which cannot settle before the next commit.
+Retirement now waits only on closed runs.  Third and worst: the next
+transaction could join the committing transaction's still-open runs,
+putting two transactions' tree blocks into one stripe -- the later
+blocks' writeback then rewrites parity over tree blocks the earlier
+transaction has already committed, which for metadata is exactly the
+write hole this series exists to close.  The uncovered-RMW reporter
+of patches 29-30 showed it directly under the saturating load: parity
+rewrites over blocks exactly one generation old, on every commit.
+(That adjacent-generation signature is the fingerprint of live
+sharing; the reporter peeks only a stale header's address and fsid,
+so on freshly reclaimed stripes it can also report long-freed blocks
+from earlier lives -- those ghosts carry large generation gaps and
+audit as dead in the extent tree.)  The third fix stamps each
+metadata run with the transaction that opened it: allocation refuses
+and evicts other transactions' runs (closing them and returning
+their unused tails), and retirement sweeps and waits only on runs of the
+committing transaction and older.  That restores the data-side
+invariant for trees -- a stripe only ever receives blocks from one
+transaction.  Fixed, the same load produces zero adjacent-generation
+reports and zero retirement stalls, and the commit rate rises from
+5-8 commits per four-minute run (every commit eating the 60-second
+retirement timeout) to 427.
+
+Interface and compatibility
+===========================
+
+The policy is controlled by a "stripe_alloc" filesystem property -- a
+btrfs. namespace xattr on the top-level subvolume's root directory,
+following the compression property precedent -- rather than by a mount
+option (patch 13).  Set once (setfattr -n btrfs.stripe_alloc -v 1), it
+is persistent: the kernel applies it when the root directory inode
+loads its properties during mount, before any user IO, so protection
+cannot lapse through an fstab edit or a rescue mount -- exactly the
+moments a degraded raid56 is most likely to be written.  Deleting the
+xattr disables the policy and open runs drain at the next commit.
+Stray copies on received or cloned subvolumes are ignored; only the
+top-level root carries the policy.  A mount option of the same name
+remains as a non-persistent override and could be dropped.
+
+A second property, "stripe_alloc_allow_rmw", holds a word list naming
+the cases where stripe_alloc may permit the legacy unsafe RMW of live
+stripes (patch 20).  It is "allow_rmw", not "allow_overwrite": the
+fsync case overwrites nothing, but all three words permit
+read-modify-write of stripes a degraded crash can then tear.
+"nodatacow" and "prealloc" enable the confined write-in-place above;
+"fsync" waives the close-at-log-commit guarantee of patches 14-16
+(none of its costs, and the fsync-window exposure of the allocator-only
+patches returns).  A mount option of the same name is the
+non-persistent override (colon-separated, since mount splits options at
+commas); the effective policy is the union.  Everything defaults off.
+
+There is no on-disk format change anywhere in the series, and that is
+the whole compatibility story: an older kernel mounts the filesystem
+read-write and uses the legacy allocator, fully compatibly, because the
+layout is identical -- it lists and reads the xattr but does not act on
+it.  New kernels honor the property during the feature's long-tail
+testing period.  If no use case surfaces where stripe-exclusive
+allocation is worse than the write hole it prevents, it can eventually
+become the only allocation mode and the property a no-op.  The
+log-commit protection (patches 14-16) currently shares the stripe_alloc
+gate; whether it should be gated separately for its own long-tail
+period is an open question for this RFC.  Later stages with different
+risk profiles (e.g. a global force-datacow policy) are planned as
+separately gated properties so their exposure can be controlled
+independently.
+
+Out of scope / gated off (for now):
+  - zoned filesystems (own allocator, no hole);
+  - the remap-tree feature (its relocation writes bypass ordered-extent
+    accounting -- integration is future work);
+  - space_cache=v1 (writes cache data in place during commit): v2 required;
+  - system chunks: the metadata coverage keys on the METADATA block
+    group flag, so SYSTEM chunks keep the hole (real: measured parity
+    rewrites over committed chunk-tree blocks on raid5 system chunks;
+    patch 28 warns at mount) -- extending the rule to them is future
+    work.  raid1c3/raid1c4 metadata remains a fine choice and is
+    simply untouched by patch 39;
+  - mixed data+metadata block groups: refused, permanently.
+    fill_data_csums() decides by block group whether to verify csums,
+    so in a mixed group it cannot tell a data stripe from a metadata
+    stripe; and data and metadata sharing one space_info lets a data
+    fill starve metadata reservations into a transaction abort;
+  - nodatacow data itself still has the write hole when written in
+    place (that is the point of the opt-in); a journal adding full
+    crash-safety for in-place writes is separate future work.
+
+Guarantee shape
+===============
+
+Crash with all devices present: fully correct (cow + csums, unchanged).
+
+Crash plus one missing device: no data from any committed transaction
+can be harmed.  The fsync window (data made durable by fsync since the
+last full commit) is not recovered on a degraded array -- the safe
+recovery below discards the log -- but its loss is detectable absence,
+never silent corruption and never collateral damage to committed data.
+A crash with all devices still present recovers the fsync window intact
+by normal log replay.  This bound -- committed data untouchable,
+fsync-window loss detectable, degraded reconstruction never trusted --
+is the improvement.
+
+The end state is three operating models:
+
+  legacy (stripe_alloc off): sub-stripe writes RMW shared stripes as
+  they always have.  A degraded crash tears other files' committed
+  data (the write hole), and a degraded array cannot safely accept
+  RMW writes at all.
+
+  stripe_alloc, default policy: no RMW, ever.  Data from committed
+  transactions and completed fsyncs survives a crash plus a missing
+  device, and the array keeps taking new writes while degraded
+  without endangering any of it, because no write ever lands in a
+  stripe holding earlier data.  nodatacow and prealloc writes are
+  forced to COW.  (Stated for raid56 data.  With raid56 metadata,
+  patch 39 applies the same rule to tree blocks and the statement
+  extends to the trees themselves; system chunks are the remaining
+  uncovered case, warned at mount.)
+
+  stripe_alloc + allow_rmw: the named cases RMW as before and their
+  write-hole exposure returns, confined to what each case's machinery
+  can reach.  nodatacow/prealloc in-place writes require per-extent
+  stripe isolation as a precondition -- an extent that lands in a
+  shared stripe stays force-COWed -- so a torn RMW can damage only
+  the writing file's own data.  allow_rmw=fsync re-exposes only
+  just-fsynced data, detectably.  Data written by every other path
+  keeps the default-model guarantee.
+
+Today a sub-stripe write in one transaction shares a stripe with data
+committed by an earlier transaction, so a degraded crash tears that
+earlier, already-committed data.  In the common case the allocator fills
+forward and the victim is the immediately preceding commit -- the
+harness below reproduces exactly that on stock kernels -- but the
+exposure is not limited to it: any committed extent that shares a
+stripe with a later sub-stripe allocation is at risk, which on a
+filesystem that reuses freed space (the steady state of any aged
+filesystem) is data of arbitrary age.  Confining allocation to whole
+stripes removes the whole class: a committed extent's stripe is never
+extended by a later transaction, so the only stripes a degraded crash
+can tear are those still being filled in the running one.
+
+Detection of the damage that does occur is not new and not part of this
+series: btrfs data checksums flag it (read EIO and the per-device
+corruption_errs counter), and raid56 has surfaced these correctly since
+Qu Wenruo's read/repair rework in ~v6.5.  What this series changes is the
+blast radius, not the detectability.
+
+Testing this series did expose one gap in that detectability, in the
+generic bio layer rather than in raid56.  btrfs_bio_end_io() dropped a
+split bio's error whenever the failing split was the last to complete --
+which, for a checksum failure, is essentially always, since read repair
+walks every mirror before giving up while the healthy splits finish
+immediately.  raid56 splits reads at each stripe, so any read of
+BTRFS_STRIPE_LEN or more over an unrecoverable sector on a degraded array
+returned zero-filled data with no error, while btrfs logged the checksum
+failure and counted the corruption; a 4 KiB read of the same sector
+returned EIO.  Profiles that do not split at 64 KiB (single, dup, raid1)
+were unaffected, which is how it survived.  It reproduces unchanged on
+stable 6.18.39 and on 7.2-rc, so it is neither new nor caused by this
+series; the fix is the first prerequisite above.
+
+The guaranteed recovery for the fsync window is the read-only
+rescue=nologreplay mount: the committed tree is authoritative -- no
+reconstruction of a torn log, no in-place replay writes -- and the
+bound above holds under any crash model; the fsync-window files are
+simply absent, which is detectable, not silent.  Beyond it the
+harness drives the aggressive recovery as a probe of the default
+model's claims: replay the log onto the degraded array read-write,
+then keep going -- write a fresh workload phase while still degraded,
+sync it, and re-verify everything, old and new.  Under a
+flush-consistent crash model (every member cut at the same barrier,
+then an independent unflushed suffix each: what a device can actually
+lose, since btrfs flushes every device and waits before writing the
+superblocks a commit depends on) the default policy passes all of it
+on every geometry.  The degraded replay recovers what the all-present
+replay of the identical image recovers, compared case by case -- the
+torn images are the same whichever member is dropped, so the
+comparison is exact -- and the continued degraded writes damage
+nothing, before or after them (94 continuations across the sweep,
+zero damage to pre-crash or new data).  The one permitted difference
+appeared once in the sweep: a degraded view may end its log earlier
+than the all-present view for a file whose fsync never completed, its
+log tail sitting in some members' unflushed suffixes -- detectable
+absence of data fsync never promised.  Under the harness's harsher
+default model -- each member cut at an independent point, an image
+honest devices cannot present (btrfs's barriers order every
+superblock behind flushes on all members; in the failing cases the
+cuts sat 14 to 145 barriers apart) -- degraded replay does resurrect
+torn state, which is why nologreplay remains the guaranteed recovery
+and the aggressive one remains a probe.  Committed data is never
+harmed either way, and with the split-bio error fix in the
+prerequisites any loss it does produce reads as EIO rather than as
+zeros.
+
+A second failure mode, no crash required
+========================================
+
+Sharing a stripe with older committed data breaks writes even without a
+crash.  When a raid5 stripe already holds two unrecoverable corrupt blocks --
+bit rot on two devices, or an earlier torn write -- and a new datacow write
+is allocated into a free block of that same stripe, the sub-stripe write
+triggers a full read-modify-write.  The RMW must read and csum-verify every
+data sector of the stripe to recompute parity; it finds two bad sectors,
+cannot recover them (raid5 tolerates one), and btrfs drops the *new* extent.
+A write with nothing wrong with it is lost because of pre-existing corruption
+in an unrelated file that happened to share its stripe.  This has been
+reported by several users on 6.6 and 6.12.  Upstream btrfs drops the new
+extent *silently*: a write IO error during flushing discards the extent
+without a message, and a recovery failure inside the RMW's read phase
+counts as exactly such a write error.  The last patch under Prerequisites
+at least logs the drop; either way it remains a data-loss event.
+
+It is the same root cause as the write hole -- a new write sharing a stripe
+with older committed data -- and the same allocator change removes it: a
+stripe_alloc write only ever lands in a fully-free stripe, so it never reads,
+let alone fails to recover, another file's blocks.  The write succeeds, or
+near-full returns a clean ENOSPC, but is never silently dropped.
+
+The degraded variant of the same collision is the second prerequisite
+above: there the RMW's recovery verification fails not on genuinely
+corrupt neighbors but on rebuilt sectors that never had csums at all,
+so a degraded array refuses valid writes outright.  Same root cause --
+a sub-stripe write forced to read and verify a stripe it shares with
+unrelated state -- and the same allocator change removes the whole
+interaction.
+
+Testing
+=======
+
+All measurements and harness runs in this letter come from one rig: a
+raid5 of four 700MiB devices (64KiB stripe elements, 192KiB of data per
+full stripe), driven with deterministic workloads so patched and
+unpatched runs write byte-identical data.
+
+A dm-log-writes crash harness records every raid5 member device, runs a
+phased small-file workload, then replays each member's log to a cut point
+plus a different torn tail per member, drops one device, mounts degraded and
+verifies every committed file against a sha256 manifest.
+
+  stock kernel:   4/36 armed (torn+degraded) cases destroyed committed data
+                  (all csum-detected), 24/24 controls clean.
+  with this series: 0/36 armed cases damaged, 24/24 controls clean.
+
+The matrix was repeated across a geometry sweep -- raid5 with 3..10
+devices (2..9 data stripes) and raid6 with 4..10 devices (2..8 data
+stripes), covering non-power-of-two data widths -- under three policy
+configurations: full protection, allow_rmw=nodatacow:prealloc with
+in-place churn, and allow_rmw=fsync.  Every geometry in every
+configuration was clean on the load-bearing claims: all controls
+clean, zero armed committed-data damage, and under the safe recovery
+zero silent corruption anywhere.  The sweep also drove degraded
+read-write log replay as a deliberate probe of the unsafe recovery
+above: on several wider geometries it returned wrong content for
+never-completed fsync-window files (never for committed data).  Running
+that down is what produced the split-bio error-propagation fix in the
+prerequisites; with it applied the same probe returns EIO for those
+files instead, and no configuration in the sweep returns silently wrong
+content anywhere.
+
+Repeated under a flush-consistent crash model -- every member cut at
+the same barrier, then an independent unflushed suffix each, which is
+what a device may actually lose -- all three configurations are clean
+on every geometry, and the full-protection configuration is
+additionally held to the degraded-replay parity and degraded-write
+criteria described under Guarantee shape: 130 mounted fsync-window
+cases with zero silent and zero csum-detected corruption, and 94
+degraded read-write continuations with zero damage to pre-crash or
+new data.  That model reproduces the write hole on the legacy
+allocator at a lower rate (the honest unflushed window is narrow), so
+the harsher per-member-entry model is retained as the primary
+committed-data evidence.
+
+The degraded-write test is also what exposed the second prerequisite,
+on its first run: on the legacy allocator, 29 of 56 continuations on
+one geometry died with fsync EIO -- many on clean images, where
+degraded read-write operation is unambiguously supposed to work --
+with no device error and nothing logged.  verify_one_sector() was
+failing every rebuilt sector that has no csum against a zeroed csum
+slot.  With the fix, 55 of 56 complete with zero damage, and the one
+remaining failure is the case where the crash-time write hole had
+already destroyed committed data: the RMW's verification now refuses,
+loudly, to reconstruct through the genuinely torn stripe rather than
+bake garbage over it.  The full-protection configuration passed the
+same test on the unfixed kernel, 56 of 56: it never RMWs, so it never
+enters the failing path.
+
+A separate fsync-window mode makes the torn phase's data durable by
+fsync only (log tree, no transaction commit) before the cut.  On the
+allocator-only patches (1-13) it showed the expected residual exposure:
+committed data intact in every case, damage confined to just-fsynced
+files and csum-flagged.  With the log-commit settling (patches 14-16)
+that residual loss goes to zero under the safe recovery: every mounted
+case verified all committed files intact with the fsync-window loss
+reduced to nothing beyond detectable absence -- zero silent
+corruption -- and the harness enforces this as a strict acceptance
+criterion.
+
+With the prerequisites applied the criterion is stricter still: silently
+wrong content is now forbidden in every mounted case, including the
+degraded-replay probe, which no longer gets an exemption.  On raid5 with
+nine devices, all 19 mounted cases pass it -- 920 committed files intact
+in every one, no case returning wrong content -- where the same run
+without the split-bio fix had seven cases handing back zero-filled data
+for fsync-window files with no error.
+
+The allow-rmw policy was validated the same way: with four nodatacow
+files overwritten in place through every phase including the torn one,
+the full strict matrix stays clean -- the in-place RMW traffic, running
+to the moment of the crash, damaged nothing beyond its own expendable
+files (two of them ended the run as a single extent after 88 fsynced
+in-place overwrites each).  A lifecycle smoke verifies
+overwrite-in-place, forced-COW control, one-generation self-heal of a
+deliberately shared legacy layout, writes into preallocated extents,
+and sequential packing of a nocow file through six commits, an inode
+eviction and a remount (one contiguous extent at the end), with clean
+scrubs throughout.
+
+The per-inode steering and the carry were verified byte-exact: a
+stream-writing file kept a single contiguous extent through five
+interleaved fsyncs of a second file; six consecutive 8K-write+fsync
+rounds ended with all 48K packed in one full stripe (one tail trapped
+instead of six), and the trapped-space counter decomposed exactly into
+the expected tails in every case.
+
+The second failure mode was reproduced directly (no crash): 8 devices, six
+small and two several-GB-larger so metadata lands only on the large ones;
+fill to ENOSPC with 4K..512K files then delete half, leaving only sub-stripe
+holes in committed stripes; wipe two of the small devices from the 1M offset
+(destroying their data and parity but not the superblocks or the large-device
+metadata, so the array still mounts all-present); then write more.
+
+  stock kernel:   20 new extents silently dropped (RMW recover-fail).
+  with this series: 0 extents dropped.
+
+Additionally: a multi-hour fsstress + balance + scrub soak (25 rounds, ~1.25M
+ops) with the in-kernel write-hole invariant checker (patch 6,
+CONFIG_BTRFS_DEBUG) armed -- zero violations, all scrubs clean.  The
+full-stripe write batching was additionally soaked with concurrent
+fill-to-ENOSPC/delete storms, balance, and fsstress -- the pressure
+pattern that exposed a run accounting race (a stripe fully re-freed by
+discarded reservations could be re-claimed while its old run was still
+draining); the fix, run-range exclusivity at claim time (patch 12), ran
+the same load cleanly for ten hours where the race fired in minutes.  A
+final twelve-round fsstress + balance + scrub soak and an xfstests
+-g quick pass complete the gate; every xfstests failure was attributed
+(known pre-existing, load flakes passing on rerun, or failing
+identically on a plain mount of the same base kernel).
+
+The stripe_unusable statfs accounting was validated against an independent
+userspace computation of trapped space from a dump of each block group's
+free ranges: the two agree exactly, the reported value is identical live
+and after a umount/mount reload, deleting all data returns it to zero, and
+balance reclaims it -- across extent- and bitmap-backed free space, with an
+in-kernel assertion that every free byte is distributed to exactly one
+stripe.
+
+An 8-device rolling-failure scenario (devices pre-filled with random
+garbage so lost writes cannot masquerade as blank sectors; three
+successive device corruptions with continued operation, no unmounts,
+trees written between failures, sysadmin deletes the unrecoverable
+tree, two scrubs) runs fully clean under stripe_alloc: data written
+before a corruption reads correct-or-EIO with zero silent damage, data
+written after reads all-correct through the remaining failures, and
+both scrubs finish with no errors.  The stock baseline on the same
+script loses multiple GiB of both trees silently.
+
+The same fill-to-ENOSPC generation initially turned its finding
+inward: byte-counted data reservations held no collateral against the
+stripe claim rule, so commits and mid-transaction free-space returns
+could trap the space out from under an admitted reservation and
+delalloc writeback dropped the pages (measured at its worst: a fill
+"wrote" 12.5 GiB into a 5 GiB filesystem).  Patches 25-26 close this
+with the same shape metadata reservations use -- pessimistic at
+admission (claimed remainders and one full stripe width per
+outstanding delalloc extent are counted against reservations, probed
+through the ticketed data flush), optimistic at allocation -- plus
+immediate accounting of returning sub-stripe fragments.  With them the
+fill edge is exact: zero dropped writebacks, zero allocation failures,
+capacity unchanged, and fullness surfaces only as ENOSPC at write(2).
+A raid6 run later found an ordering race in that accounting, fixed in
+patch 25: the per-block-group remainder deltas were applied to the
+space_info aggregate outside the lock that computed them, so a
+negative delta could overtake the positive one it trailed and
+underflow the aggregate -- a spurious warning, and a clamp that then
+inflated the total.  The deltas now apply in the order they were
+computed.
+
+Balance reclaims trapped space completely (stripe_unusable collapses
+to ~0 and a refill reuses the space), with the usual balance caveat
+that relocating a block group needs enough free space outside it:
+reserving headroom before filling -- shrink each device ~1G at mkfs
+time, grow back to max before balancing, the same technique admins
+already use against metadata ENOSPC -- lets balance complete on a
+fully aged filesystem.
+
+The metadata coverage was validated with the same crash harness on a
+raid5 data + raid5 metadata rig: the full replay matrix -- 24
+controls, 36 armed torn+degraded cases, and the degraded read-write
+continuation probe -- runs green end to end on two independent hosts
+(zero committed-data damage, every continuation intact, zero silent
+corruption anywhere).  The matrix's recovery mounts (log replay plus
+orphan cleanup in every case) are also what exposed the two metadata
+completion-report paths now handled in patch 39: each run drives both
+discard paths tens of times, and a single missed report reproduced as
+a leaked block group reference at unmount within minutes -- on both
+hosts, deterministically -- until both were reported.
+
+Saturating the same rig's log commits (eight writers issuing
+multi-hundred-item fsyncs against a 100ms sync loop, raid6 data +
+raid6 metadata) is what exposed the three retirement defects
+described under Metadata coverage: every commit stalled the
+retirement timeout, and the uncovered-RMW reporter showed the
+cross-transaction parity rewrites.  With the fixes the same load
+runs at full commit rate with
+zero stalls and zero adjacent-generation reports, on two hosts.  The
+armed replay matrix was then repeated on raid6 data + raid6 metadata
+with the fixes in place: all controls clean, zero committed-data
+damage, and 46 of 46 degraded read-write continuations intact.
+
+Six pre-existing, unrelated bugs surfaced along the way and are fixed
+by the standalone patches listed under Prerequisites: the soak exposed
+the raid56 rbio use-after-free, the fsync-window sweep exposed the
+split bio error propagation gap, the degraded-write test exposed the
+recovered-sector csum verification bug, the rolling-failure test
+exposed the stale rbio-cache parity window, extending the harness to
+metadata exposed that reconstructed tree blocks were returned to
+readers unverified, and the metadata crash matrix exposed the repair
+write-back on read-only mounts.  None is caused by this series and
+none is part of it.
+
+Performance
+===========
+
+On small-file writeback, where the stock code produces 100% sub-stripe
+rbios and rewrites parity once per file, parking converts 86% of stripe
+traffic to full-stripe writes and cuts write rbios 4.6x; a mixed
+4K-512K workload goes from ~50% to 97% full-stripe writes.  Full-stripe
+completion before the commit also collapses the trapped space of a
+mixed-size 800MiB fill from ~87 MiB to ~3 MiB.
+
+fsync latency (8K append+fsync stream, p50, same boot): full protection
+costs about +2ms over the legacy allocator; allow_rmw=fsync runs at or
+slightly below legacy latency (about 3ms under full protection); and an
+in-place nodatacow overwrite+fsync stream under the allow-rmw policy
+runs faster than stock nodatacow.  Device read IO during a protected
+fsync stream is zero (every flush is a padded full-stripe write; on
+rotational media the eliminated RMW read round trip is the dominant
+cost).  These fsync/sync latencies depend on parking being edge-driven for
+every waiter (patches 17, 23, 25): no measured waiter path pays a
+parking deadline.  An async writeback with no waiter behind it can pay
+one; at a small-file fill to ENOSPC that becomes a throughput cost (see
+Known costs).
+
+A /sys/fs/btrfs/<uuid>/stripe_park_stats file (patch 23) reports how
+every park ended (filled to a full stripe, kicked by a waiter or a
+settle/retire flush, or expired at its deadline) and how many flushed
+writes were padded to full stripes versus needing the RMW read phase,
+so the deadline constants can be judged, and retuned if ever needed,
+from measurements rather than taste.
+
+Known costs
+===========
+
+Free space in partially filled stripes is unallocatable until the whole
+stripe frees.  With the banded cursors and the growable frontier this cost
+was measured against the stock allocator, filling byte-identical
+mixed-size (4K-512K) data and reading the trapped bytes from the
+stripe_unusable counter:
+
+  - streaming/forward fill: usable capacity at ENOSPC within 0.5% of the
+    stock allocator (1561 vs 1569 MiB usable; 1421 MiB
+    without the growable frontier).  Stock's density here comes from
+    filling partial stripes across transactions -- exactly the behavior
+    that is the write hole;
+  - aged filesystem, age-correlated deletes (fill to ENOSPC, delete the
+    oldest half, refill): ~5% of capacity trapped.  Contiguous
+    allocation-order packing lets whole stripes free together;
+  - aged filesystem, adversarial scattered small-file deletes: ~14%
+    trapped -- freed small files' stripes stay pinned by kept neighbors.
+
+For reference, stock refills a fragmented filesystem to exactly its fresh
+capacity (zero trapped) by reusing every sub-stripe hole -- each such
+reuse being a cross-transaction partial-stripe write.  Trapped space is
+real free space and balance reclaims it; garbage collection on aged
+filesystems is expected and by design.
+
+statfs reports the trapped bytes honestly (patch 8): they are tracked
+per block group as stripe_unusable (summed into a space_info
+bytes_stripe_unusable, recomputed at commit for groups whose free space
+changed) and subtracted from f_bavail, so df no longer promises space the
+allocator will refuse.  The counter is exposed at
+/sys/fs/btrfs/<uuid>/allocation/data/bytes_stripe_unusable.  It is derived
+from the existing free space (no on-disk format change; the free space
+tree and cache are left untouched).  Patches 25-26 make the reservation
+layer respect it as well: trapped fragments, claimed run remainders and
+a pessimistic per-extent margin are all counted against data admissions,
+so a writer that cannot be covered waits in the ticketed data flush and
+receives ENOSPC at write(2) -- a delalloc writeback is never left to
+discover the shortfall after the pages are dirty.  Patch 37 gates
+admission on a directly counted claimable whole-stripe supply, so
+write(2) reaches ENOSPC exactly as statfs reaches zero, and patch 38
+caches a failed claim scan per block group, which cut the claim path's
+cost about 1800x on a fragmented aged array.  Balance remains the
+reclaim mechanism for trapped space.
+
+Async small-file fill to ENOSPC pays the parking deadline.  When the
+workload is many sub-stripe files whose neighbours land in the next
+file's stripe rather than this one, a partial write's rbio never fills:
+it waits out its deadline -- and, still missing an allocated neighbour
+whose data never comes, its 10x stuck cap -- before padding to a full
+stripe and going down.  Measured on an 8-device raid5 fill: a 4K-512K
+small-file fill writes 3.8 GiB in ~1600s with ~12000 parks reaching the
+stuck cap, while a large sequential fill of the same filesystem writes
+12 GiB in 34s with none -- sequential writes are already full stripes and
+never park.  The cost is throughput only: every such write reaches disk
+correctly at any fill level (no path returns wrong or zero data).  Patches 33-35 shrink the cost
+where it can be shrunk: a parked write completes as soon as allocation
+covers its stripe rather than when a clock expires, and padding
+decides from a per-sector liveness map so it never zero-fills a live
+sector.  Patch 36 makes the deadline adaptive: a stripe_park_congestion knob (default off)
+shortens a park only while the parked-rbio backlog runs ahead of it, so a
+small-file flood -- which builds that backlog -- drains at the short
+deadline, while a moderate steady stream stays under it, keeps the full
+deadline, and keeps its merges (3x more full-stripe writes and 38% fewer
+RMW reads than a flat 3ms deadline on a throttled stream).  The archetypal
+"operator fills the disk" accident is one large writer, which is already
+full stripes, parks nothing, and pays neither cost.
+
+  fs/btrfs/... | 39 patches
+  RED->GREEN harness, soak, and xfstests logs available on request.