From 0ca44fcef241768fd25ee763b3d203b9852f269b Mon Sep 17 00:00:00 2001 From: Pingfan Liu Date: Wed, 15 Feb 2023 19:23:40 +0800 Subject: [PATCH] dm: add cond_resched() to dm_wq_work() 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@vger.kernel.org Signed-off-by: Pingfan Liu Acked-by: Ming Lei Signed-off-by: Mike Snitzer --- drivers/md/dm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 90b64bf..15b9195 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -2570,6 +2570,7 @@ static void dm_wq_work(struct work_struct *work) break; submit_bio_noacct(bio); + cond_resched(); } } -- 2.7.4