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| author | Kent Overstreet <kmo@daterainc.com> | 2013-09-24 06:17:34 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-24 21:41:43 (GMT) |
| commit | a698e08c82dfb9771e0bac12c7337c706d729b6d (patch) | |
| tree | a9048d9322ce493b45d03be8254f96c05f0a456f | |
| parent | 79e3dab90d9f826ceca67c7890e048ac9169de49 (diff) | |
| download | linux-fsl-qoriq-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>
| -rw-r--r-- | drivers/md/bcache/btree.c | 2 |
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; |