linux-kernel - Re: [mm] 10befea91b: hackbench.throughput -62.4% regression

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Date:   Wed, 13 Jan 2021 19:18:39 -0800
From:   Roman Gushchin <guro@...com>
To:     kernel test robot <oliver.sang@...el.com>
CC:     Johannes Weiner <hannes@...xchg.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Shakeel Butt <shakeelb@...gle.com>,
        Christoph Lameter <cl@...ux.com>,
        Michal Hocko <mhocko@...nel.org>, Tejun Heo <tj@...nel.org>,
        Naresh Kamboju <naresh.kamboju@...aro.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>, <lkp@...ts.01.org>,
        <lkp@...el.com>, <ying.huang@...el.com>, <feng.tang@...el.com>,
        <zhengjun.xing@...el.com>
Subject: Re: [mm]  10befea91b:  hackbench.throughput -62.4% regression

On Thu, Jan 14, 2021 at 10:51:51AM +0800, kernel test robot wrote:
> 
> Greeting,
> 
> FYI, we noticed a -62.4% regression of hackbench.throughput due to commit:

Hi!

Commit "mm: memcg/slab: optimize objcg stock draining" (currently only in the mm tree,
so no stable hash) should improve the hackbench regression.

Thanks!