linux-kernel - [RFC][PATCH v5 13/19] To skip GRO if buffer is external currently.

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Message-Id: <1273224906-4874-14-git-send-email-xiaohui.xin@intel.com>
Date:	Fri,  7 May 2010 17:35:00 +0800
From:	xiaohui.xin@...el.com
To:	netdev@...r.kernel.org, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, mst@...hat.com, mingo@...e.hu,
	davem@...emloft.net, jdike@...ux.intel.com
Cc:	Xin Xiaohui <xiaohui.xin@...el.com>
Subject: [RFC][PATCH v5 13/19] To skip GRO if buffer is external currently.

From: Xin Xiaohui <xiaohui.xin@...el.com>

Signed-off-by: Xin Xiaohui <xiaohui.xin@...el.com>
Signed-off-by: Zhao Yu <yzhao81new@...il.com>
Reviewed-by: Jeff Dike <jdike@...ux.intel.com>
---
 net/core/dev.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index dc2f225..6c6b2fe 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2787,6 +2787,10 @@ enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
 	if (skb_is_gso(skb) || skb_has_frags(skb))
 		goto normal;
 
+	/* currently GRO is not supported by mediate passthru */
+	if (dev_is_mpassthru(skb->dev))
+		goto normal;
+
 	rcu_read_lock();
 	list_for_each_entry_rcu(ptype, head, list) {
 		if (ptype->type != type || ptype->dev || !ptype->gro_receive)
-- 
1.5.4.4

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