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dm: add cond_resched() to dm_wq_work()

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commit 0ca44fcef2 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@vger.kernel.org
Signed-off-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pingfan Liu
2023-02-15 19:23:40 +08:00
committed by Greg Kroah-Hartman
parent d71a0899e4
commit 931dc7e232
1 changed files with 1 additions and 0 deletions
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drivers/md/dm.c
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@@ -2305,6 +2305,7 @@ static void dm_wq_work(struct work_struct *work)
break;
submit_bio_noacct(bio);
cond_resched();
}
}