From: Andy Grover <andy.grover@oracle.com>
Date: Tue, 7 Sep 2010 17:59:44 +0000 (-0700)
Subject: RDS/IB: Quiet warnings when leaking frags
X-Git-Tag: v4.1.12-92~319^2^2~2^2~63
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=4ac0d047bc679d065485526288668e71bc28a33c;p=users%2Fjedix%2Flinux-maple.git

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 7384140de0219..aea5aa2c47a68 100644
--- 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;