Patch "btrfs: restore the thread_pool= behavior in remount for the end I/O workqueues" has been added to the 6.1-stable tree

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

    btrfs: restore the thread_pool= behavior in remount for the end I/O workqueues

to the 6.1-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-restore-the-thread_pool-behavior-in-remount-for-the-end-i-o-workqueues.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 40fac6472f22a59f5694496e179988ab4a1dfe07 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@xxxxxx>
Date: Tue, 28 Mar 2023 12:56:13 +0900
Subject: btrfs: restore the thread_pool= behavior in remount for the end I/O workqueues

From: Christoph Hellwig <hch@xxxxxx>

commit 40fac6472f22a59f5694496e179988ab4a1dfe07 upstream.

Commit d7b9416fe5c5 ("btrfs: remove btrfs_end_io_wq") converted the read
and I/O handling from btrfs_workqueues to Linux workqueues, and as part
of that lost the code to apply the thread_pool= based max_active limit
on remount.  Restore it.

Fixes: d7b9416fe5c5 ("btrfs: remove btrfs_end_io_wq")
CC: stable@xxxxxxxxxxxxxxx # 6.0+
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 fs/btrfs/super.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1939,6 +1939,8 @@ static void btrfs_resize_thread_pool(str
 	btrfs_workqueue_set_max(fs_info->hipri_workers, new_pool_size);
 	btrfs_workqueue_set_max(fs_info->delalloc_workers, new_pool_size);
 	btrfs_workqueue_set_max(fs_info->caching_workers, new_pool_size);
+	workqueue_set_max_active(fs_info->endio_workers, new_pool_size);
+	workqueue_set_max_active(fs_info->endio_meta_workers, new_pool_size);
 	btrfs_workqueue_set_max(fs_info->endio_write_workers, new_pool_size);
 	btrfs_workqueue_set_max(fs_info->endio_freespace_worker, new_pool_size);
 	btrfs_workqueue_set_max(fs_info->delayed_workers, new_pool_size);


Patches currently in stable-queue which might be from hch@xxxxxx are

queue-6.1/btrfs-restore-the-thread_pool-behavior-in-remount-for-the-end-i-o-workqueues.patch
queue-6.1/btrfs-fix-fast-csum-implementation-detection.patch



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