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Date: Mon, 2 Nov 2020 10:27:54 +0100 From: Michal Hocko <mhocko@...e.com> To: kernel test robot <rong.a.chen@...el.com> Cc: Waiman Long <longman@...hat.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Andrew Morton <akpm@...ux-foundation.org>, Shakeel Butt <shakeelb@...gle.com>, Chris Down <chris@...isdown.name>, Johannes Weiner <hannes@...xchg.org>, Roman Gushchin <guro@...com>, Tejun Heo <tj@...nel.org>, Vladimir Davydov <vdavydov.dev@...il.com>, Yafang Shao <laoar.shao@...il.com>, 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/memcg] bd0b230fe1: will-it-scale.per_process_ops -22.7% regression On Mon 02-11-20 17:15:43, kernel test robot wrote: > Greeting, > > FYI, we noticed a -22.7% regression of will-it-scale.per_process_ops due to commit: > > > commit: bd0b230fe14554bfffbae54e19038716f96f5a41 ("mm/memcg: unify swap and memsw page counters") > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master I really fail to see how this can be anything else than a data structure layout change. There is one counter less. btw. are cgroups configured at all? What would be the configuration? -- Michal Hocko SUSE Labs
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