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| author | majianpeng <majianpeng@gmail.com> | 2013-11-14 15:16:15 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2013-11-14 15:16:15 +1100 |
| commit | ad4068de49862b083ac2a15bc50689bb30ce3e44 (patch) | |
| tree | 83b871b13fa3b1cc3bf6b6b2b2527be354ae7768 /drivers/md | |
| parent | 39cf275a1a18ba3c7eb9b986c5c9b35b57332798 (diff) | |
| download | lwn-ad4068de49862b083ac2a15bc50689bb30ce3e44.tar.gz lwn-ad4068de49862b083ac2a15bc50689bb30ce3e44.zip | |
raid5: Use slow_path to release stripe when mddev->thread is null
When release_stripe() is called in grow_one_stripe(), the
mddev->thread is null. So it will omit one wakeup this thread to
release stripe.
For this condition, use slow_path to release stripe.
Bug was introduced in 3.12
Cc: stable@vger.kernel.org (3.12+)
Fixes: 773ca82fa1ee58dd1bf88b
Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/raid5.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index f8b906843926..f013d3662665 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -340,7 +340,8 @@ static void release_stripe(struct stripe_head *sh) unsigned long flags; bool wakeup; - if (test_and_set_bit(STRIPE_ON_RELEASE_LIST, &sh->state)) + if (unlikely(!conf->mddev->thread) || + test_and_set_bit(STRIPE_ON_RELEASE_LIST, &sh->state)) goto slow_path; wakeup = llist_add(&sh->release_list, &conf->released_stripes); if (wakeup) |