bcache: fix error return value in memory shrink

In bch_mca_scan(), the return value should not be the number of freed btree
nodes, but the number of pages of freed btree nodes.

Signed-off-by: Tang Junhui <tang.junhui@zte.com.cn>
Reviewed-by: Michael Lyle <mlyle@lyle.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index 39cc8a549091e68d103fa35151308fcdb35a45a5..b2d4899f48d59850e126fefdd69b3a9fcfb67c65 100644 (file)
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -719,7 +719,7 @@ static unsigned long bch_mca_scan(struct shrinker *shrink,
        }
 out:
        mutex_unlock(&c->bucket_lock);
-       return freed;
+       return freed * c->btree_pages;
 }
 
 static unsigned long bch_mca_count(struct shrinker *shrink,