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SubjectRe: -27% netperf TCP_STREAM regression by "tcp_memcontrol: Kill struct tcp_memcontrol"
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From: fengguang.wu@intel.com
Date: Tue, 22 Oct 2013 22:41:29 +0100

> We noticed big netperf throughput regressions
>
> a4fe34bf902b8f709c63 2e685cad57906e19add7
> ------------------------ ------------------------
> 707.40 -40.7% 419.60 lkp-nex04/micro/netperf/120s-200%-TCP_STREAM
> 2775.60 -23.7% 2116.40 lkp-sb03/micro/netperf/120s-200%-TCP_STREAM
> 3483.00 -27.2% 2536.00 TOTAL netperf.Throughput_Mbps
>
> and bisected it to
>
> commit 2e685cad57906e19add7189b5ff49dfb6aaa21d3
> Author: Eric W. Biederman <ebiederm@xmission.com>
> Date: Sat Oct 19 16:26:19 2013 -0700
>
> tcp_memcontrol: Kill struct tcp_memcontrol

Eric please look into this, I'd rather have a fix to apply than revert your
work.

Thanks.


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