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Subject: TCP stream performance regression due to
 c377411f2494a931ff7facdbb3a6839b1266bcf6
From: "Alex,Shi" <alex.shi@intel.com>
To: eric.dumazet@gmail.com, davem@davemloft.net
Cc: "Chen, Tim C" <tim.c.chen@intel.com>,
       "Zhang, Yanmin" <yanmin.zhang@intel.com>, linux-kernel@vger.kernel.org
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Date: Fri, 18 Jun 2010 15:17:28 +0800
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In our netperf testing, TCP_STREAM56 shows about 20% or more performance
regression on WSM/NHM and tigerton machines. The testing boot up both
netserver and client on localhost. The testing command like this:
./snapshot_script_net TC_STREAM56 127.0.0.1 

We found the following commit causes this issue.
c377411f2494a931ff7facdbb3a6839b1266bcf6  
Revert this commit will recover this regression on all machine. 

Regards!
Alex