Subject: Re: -27% netperf TCP_STREAM regression by "tcp_memcontrol: Kill struct tcp_memcontrol"

From: Fengguang Wu <[email-masked]>
Date: Wed, 23 Oct 2013 23:07:43 +0100

> -       return !!sk->sk_prot->memory_pressure;
> +       return !!*sk->sk_prot->memory_pressure;

Good catch, Christoph! With no surprise, it restores the performance:

    a4fe34bf902b8f709c63      2e685cad57906e19add7      a235435d612680e595ea  
------------------------  ------------------------  ------------------------  
                  707.40       -41.0%       417.50        -8.8%       645.00  lkp-nex04/micro/netperf/120s-200%-TCP_STREAM
                 2775.60       -23.7%      2116.50        +2.1%      2834.00  lkp-sb03/micro/netperf/120s-200%-TCP_STREAM
                 3483.00       -27.2%      2534.00        -0.1%      3479.00  TOTAL netperf.Throughput_Mbps

It's a bit late, but

Tested-by: Fengguang Wu <[email-masked]>

Thanks,
Fengguang