From: Ben Pfaff <blp@nicira.com>
Date: Fri, 9 Jan 2009 19:46:06 +0000 (-0800)
Subject: datapath: Don't drop oversize GSO frames, since GSO will break them up.
X-Git-Url: http://git.onelab.eu/?a=commitdiff_plain;ds=sidebyside;h=d02c572f4f052b0ff1c0f96f62f3a6071c71471c;p=sliver-openvswitch.git

datapath: Don't drop oversize GSO frames, since GSO will break them up.

Fixes TCP performance problems on Xen.

All credit to Justin for diagnosis.
---

diff --git a/datapath/datapath.c b/datapath/datapath.c
index 9d0cea78d..338147f78 100644
--- a/datapath/datapath.c
+++ b/datapath/datapath.c
@@ -571,7 +571,7 @@ int
 dp_xmit_skb(struct sk_buff *skb)
 {
 	int len = skb->len;
-	if (packet_length(skb) > skb->dev->mtu) {
+	if (packet_length(skb) > skb->dev->mtu && !skb_is_gso(skb)) {
 		printk("dropped over-mtu packet: %d > %d\n",
 			   packet_length(skb), skb->dev->mtu);
 		kfree_skb(skb);