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authorKent Overstreet <kmo@daterainc.com>2013-09-24 06:17:34 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-24 21:41:43 (GMT)
commita698e08c82dfb9771e0bac12c7337c706d729b6d (patch)
treea9048d9322ce493b45d03be8254f96c05f0a456f /drivers/md
parent79e3dab90d9f826ceca67c7890e048ac9169de49 (diff)
downloadlinux-a698e08c82dfb9771e0bac12c7337c706d729b6d.tar.xz
bcache: Fix a shrinker deadlock
GFP_NOIO means we could be getting called recursively - mca_alloc() -> mca_data_alloc() - definitely can't use mutex_lock(bucket_lock) then. Whoops. Signed-off-by: Kent Overstreet <kmo@daterainc.com> Cc: linux-stable <stable@vger.kernel.org> # >= v3.10 Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/bcache/btree.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index 8fad840..f42fc7e 100644
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -612,7 +612,7 @@ static unsigned long bch_mca_scan(struct shrinker *shrink,
return SHRINK_STOP;
/* Return -1 if we can't do anything right now */
- if (sc->gfp_mask & __GFP_WAIT)
+ if (sc->gfp_mask & __GFP_IO)
mutex_lock(&c->bucket_lock);
else if (!mutex_trylock(&c->bucket_lock))
return -1;