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Subject: TCP_STREAM performance regression on commit b3613118
From: "Alex,Shi" <alex.shi@intel.com>
To: davem@davemloft.net
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Tim Chen <tim.c.chen@intel.com>, "Huang, Ying" <ying.huang@intel.com>
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Date: Fri, 17 Feb 2012 16:18:14 +0800
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The tcp_stream loop back performance has about 10% drop on the
commitment on our core2 2 sockets server. This commit has 2
parents(7505afe28, 5983fe), but both of them have no regression. So
guess the impact just happened when this 2 parents joint. That beyond
our capability to dig it more.

Any ideas? 

Regards! 
Alex