This is a note to let you know that I've just added the patch titled
dm: add cond_resched() to dm_wq_work()
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:
dm-add-cond_resched-to-dm_wq_work.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 0ca44fcef241768fd25ee763b3d203b9852f269b Mon Sep 17 00:00:00 2001
From: Pingfan Liu <piliu@xxxxxxxxxx>
Date: Wed, 15 Feb 2023 19:23:40 +0800
Subject: dm: add cond_resched() to dm_wq_work()
From: Pingfan Liu <piliu@xxxxxxxxxx>
commit 0ca44fcef241768fd25ee763b3d203b9852f269b upstream.
Otherwise the while() loop in dm_wq_work() can result in a "dead
loop" on systems that have preemption disabled. This is particularly
problematic on single cpu systems.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Pingfan Liu <piliu@xxxxxxxxxx>
Acked-by: Ming Lei <ming.lei@xxxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -2305,6 +2305,7 @@ static void dm_wq_work(struct work_struc
break;
submit_bio_noacct(bio);
+ cond_resched();
}
}
Patches currently in stable-queue which might be from piliu@xxxxxxxxxx are
queue-5.15/dm-add-cond_resched-to-dm_wq_work.patch
