Commit bf7ec5bb authored Dec 03, 2009 by OGAWA Hirofumi Committed by Jens Axboe Dec 03, 2009

flusher: Fix PF_FROZEN race



To touch task->flags directly is racy. thaw_process() still has race
(changing non_current->flags, but this is another issue) though, I think
it's much better off.

So, use thaw_process() instead.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

parent 220d0b1d

mm/backing-dev.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -609,7 +609,7 @@ static void bdi_wb_shutdown(struct backing_dev_info *bdi)
		* it would never exet if it is currently stuck in the refrigerator.
		*/
		list_for_each_entry(wb, &bdi->wb_list, list) {
		wb->task->flags &= ~PF_FROZEN;
		thaw_process(wb->task);
		kthread_stop(wb->task);
		}
		}

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