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: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=db3dae1ab3fc0e9a4eb7b6ed456966971d942961;p=openvswitch

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 c3a107e0..a6c54c90 100644
--- a/datapath/datapath.c
+++ b/datapath/datapath.c
@@ -659,7 +659,7 @@ 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);