From d571e2bcf7b4f0cf8da41fed61d95c4c1b247d40 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Tue, 16 Jun 2009 16:00:33 -0700 Subject: [PATCH] md/raid5: add missing call to schedule() after prepare_to_wait() commit 7a3ab908948b6296ee7e81d42f7c176361c51975 upstream. In the unlikely event that reshape progresses past the current request while it is waiting for a stripe we need to schedule() before retrying for 2 reasons: 1/ Prevent list corruption from duplicated list_add() calls without intervening list_del(). 2/ Give the reshape code a chance to make some progress to resolve the conflict. Signed-off-by: Dan Williams Signed-off-by: NeilBrown Signed-off-by: Greg Kroah-Hartman --- drivers/md/raid5.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 224de022e7c5d..562ab63ab5799 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -3431,6 +3431,7 @@ static int make_request(struct request_queue *q, struct bio * bi) spin_unlock_irq(&conf->device_lock); if (must_retry) { release_stripe(sh); + schedule(); goto retry; } } -- 2.47.3