dm: add cond_resched() to dm_wq_work()

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 e6409208c1

commit 3383f79d6b

1 changed files with 1 additions and 0 deletions

									
										drivers/md/dm.c
									
		+1
		
												View File
												
				@@ -2393,6 +2393,7 @@ static void dm_wq_work(struct work_struct *work)

							break;

						submit_bio_noacct(bio);

						cond_resched();

					}

				}