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Message-Id: <3e1189480fb1687496e83e9be6d818e99f9b0692.1287132437.git.xiaohui.xin@intel.com>
Date: Fri, 15 Oct 2010 17:12:10 +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, herbert@...dor.apana.org.au,
jdike@...ux.intel.com
Cc: Xin Xiaohui <xiaohui.xin@...el.com>
Subject: [PATCH v13 09/16]Don't do skb recycle, if device use external buffer.
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/skbuff.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 02439e0..196aa99 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -558,6 +558,12 @@ bool skb_recycle_check(struct sk_buff *skb, int skb_size)
if (skb_shared(skb) || skb_cloned(skb))
return false;
+ /* if the device wants to do mediate passthru, the skb may
+ * get external buffer, so don't recycle
+ */
+ if (dev_is_mpassthru(skb->dev))
+ return 0;
+
skb_release_head_state(skb);
shinfo = skb_shinfo(skb);
--
1.7.3
--
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