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btrfs: reinsert BGs failed to reclaim

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The reclaim process can temporarily fail. For example, if the space is
getting tight, it fails to make the block group read-only. If there are no
further writes on that block group, the block group will never get back to
the reclaim list, and the BG never gets reclaimed. In a certain workload,
we can leave many such block groups never reclaimed.

So, let's get it back to the list and give it a chance to be reclaimed.

Fixes: 18bb8bbf13 ("btrfs: zoned: automatically reclaim zones")
CC: stable@vger.kernel.org # 5.15+
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Naohiro Aota 2023-06-06 14:36:36 +09:00 committed by David Sterba
parent 93463ff7b5
commit 7e27180994
1 changed files with 2 additions and 0 deletions
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fs/btrfs/block-group.c
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@ -1833,6 +1833,8 @@ void btrfs_reclaim_bgs_work(struct work_struct *work)
}
next:
if (ret)
btrfs_mark_bg_to_reclaim(bg);
btrfs_put_block_group(bg);
mutex_unlock(&fs_info->reclaim_bgs_lock);