extent scan: drop out-of-date comment

The comment describes an earlier version which submitted each extent
ref as a separate Task, but now all extent refs are handled by the same
Task to minimize the amount of time between processing the first and
last reference to an extent.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>

diff --git a/src/bees-roots.cc b/src/bees-roots.cc
index 930ac0233c47f1acb2b3d4c1ca63a427d9c65825..a593600871d384606a4cf6f7466854a83ff0cdb4 100644 (file)
--- a/src/bees-roots.cc
+++ b/src/bees-roots.cc
@@ -780,10 +780,6 @@ BeesScanModeExtent::SizeTier::create_extent_map(const uint64_t bytenr, const Pro
 
        BtrfsExtentDataFetcher bedf(m_ctx->root_fd());
 
-       // Collect extent ref tasks as a series of stand-alone events
-       // chained after the first task created, then run the first one.
-       // This prevents other threads from starting to process an
-       // extent until we have all of its refs in the queue.
        const auto refs_list = make_shared<list<ExtentRef>>();
        for (const auto &i : log_ino.m_iors) {
                catch_all([&](){