This is a note to let you know that I've just added the patch titled
btrfs: reinsert BGs failed to reclaim
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-reinsert-bgs-failed-to-reclaim.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7e27180994383b7c741ad87749db01e4989a02ba Mon Sep 17 00:00:00 2001
From: Naohiro Aota <naota@xxxxxxxxx>
Date: Tue, 6 Jun 2023 14:36:36 +0900
Subject: btrfs: reinsert BGs failed to reclaim
From: Naohiro Aota <naota@xxxxxxxxx>
commit 7e27180994383b7c741ad87749db01e4989a02ba upstream.
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: 18bb8bbf13c1 ("btrfs: zoned: automatically reclaim zones")
CC: stable@xxxxxxxxxxxxxxx # 5.15+
Signed-off-by: Naohiro Aota <naohiro.aota@xxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/block-group.c | 2 ++
1 file changed, 2 insertions(+)
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -1580,6 +1580,8 @@ void btrfs_reclaim_bgs_work(struct work_
}
next:
+ if (ret)
+ btrfs_mark_bg_to_reclaim(bg);
btrfs_put_block_group(bg);
mutex_unlock(&fs_info->reclaim_bgs_lock);
Patches currently in stable-queue which might be from naota@xxxxxxxxx are
queue-5.15/btrfs-bail-out-reclaim-process-if-filesystem-is-read-only.patch
queue-5.15/btrfs-move-out-now-unused-bg-from-the-reclaim-list.patch
queue-5.15/btrfs-delete-unused-bgs-while-reclaiming-bgs.patch
queue-5.15/btrfs-reinsert-bgs-failed-to-reclaim.patch
