From: Johannes Thumshirn Date: Wed, 21 Feb 2024 15:35:52 +0000 (-0800) Subject: btrfs: zoned: don't skip block groups with 100% zone unusable X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ddc278ed9e8f5e12d69df7bd4b7126cb82161519;p=linux btrfs: zoned: don't skip block groups with 100% zone unusable commit a8b70c7f8600bc77d03c0b032c0662259b9e615e upstream. Commit f4a9f219411f ("btrfs: do not delete unused block group if it may be used soon") changed the behaviour of deleting unused block-groups on zoned filesystems. Starting with this commit, we're using btrfs_space_info_used() to calculate the number of used bytes in a space_info. But btrfs_space_info_used() also accounts btrfs_space_info::bytes_zone_unusable as used bytes. So if a block group is 100% zone_unusable it is skipped from the deletion step. In order not to skip fully zone_unusable block-groups, also check if the block-group has bytes left that can be used on a zoned filesystem. Fixes: f4a9f219411f ("btrfs: do not delete unused block group if it may be used soon") CC: stable@vger.kernel.org # 6.1+ Reviewed-by: Filipe Manana Signed-off-by: Johannes Thumshirn Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Greg Kroah-Hartman --- diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c index aca24186d66b..52bab8cf7867 100644 --- a/fs/btrfs/block-group.c +++ b/fs/btrfs/block-group.c @@ -1562,7 +1562,8 @@ void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info) * needing to allocate extents from the block group. */ used = btrfs_space_info_used(space_info, true); - if (space_info->total_bytes - block_group->length < used) { + if (space_info->total_bytes - block_group->length < used && + block_group->zone_unusable < block_group->length) { /* * Add a reference for the list, compensate for the ref * drop under the "next" label for the