Patch "btrfs: reinsert BGs failed to reclaim" has been added to the 6.4-stable tree

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This is a note to let you know that I've just added the patch titled

    btrfs: reinsert BGs failed to reclaim

to the 6.4-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-6.4 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
@@ -1837,6 +1837,8 @@ 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-6.4/btrfs-bail-out-reclaim-process-if-filesystem-is-read-only.patch
queue-6.4/btrfs-move-out-now-unused-bg-from-the-reclaim-list.patch
queue-6.4/btrfs-delete-unused-bgs-while-reclaiming-bgs.patch
queue-6.4/btrfs-reinsert-bgs-failed-to-reclaim.patch



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