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authorKent Overstreet <kmo@daterainc.com>2013-08-30 14:12:24 -0700
committerKent Overstreet <kmo@daterainc.com>2013-09-18 13:32:10 -0700
commit28b7244fe1b6a82d8e68d03a26eba9b5cf80ae0b (patch)
tree4ea35b4362c0d9c229d8ca54a07030e6cc4237c7 /drivers/md
parent78e9704ac97464458fd6227c4ce9576293c811df (diff)
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
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 833c590806ba..7d3deab11fce 100644
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -633,7 +633,7 @@ static int bch_mca_shrink(struct shrinker *shrink, struct shrink_control *sc)
return mca_can_free(c) * c->btree_pages;
/* 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;