RDS/IB: Quiet warnings when leaking frags

We have a race where sometimes we leak frags, and it hits
the WARN_ON. Unfortunately, the stream of WARN_ONs make
the machine unusable. This patch changes to WARN_ON_ONCE
so we do not hose the box, and we can still get notifications
the bug has occurred.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Signed-off-by: Bang Nguyen <bang.nguyen@oracle.com>

diff --git a/net/rds/ib_recv.c b/net/rds/ib_recv.c
index 7384140de02191b7d0311553f213170acb672b34..aea5aa2c47a6892aead151e7b57d0c8f83303f06 100644 (file)
--- a/net/rds/ib_recv.c
+++ b/net/rds/ib_recv.c
@@ -324,7 +324,7 @@ static int rds_ib_recv_refill_one(struct rds_connection *conn,
                        goto out;
        }
 
-       WARN_ON(recv->r_frag); /* leak! */
+       WARN_ON_ONCE(recv->r_frag); /* leak! */
        recv->r_frag = rds_ib_refill_one_frag(ic, slab_mask, page_mask);
        if (!recv->r_frag)
                goto out;