linux-kernel - Re: [PATCH v18 00/32] per memcg lru

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Date:   Thu, 17 Sep 2020 08:39:34 -0700
From:   Alexander Duyck <alexander.duyck@...il.com>
To:     Daniel Jordan <daniel.m.jordan@...cle.com>
Cc:     Alex Shi <alex.shi@...ux.alibaba.com>,
        Hugh Dickins <hughd@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Tejun Heo <tj@...nel.org>,
        Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
        Matthew Wilcox <willy@...radead.org>,
        Johannes Weiner <hannes@...xchg.org>,
        kbuild test robot <lkp@...el.com>,
        linux-mm <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>, cgroups@...r.kernel.org,
        Shakeel Butt <shakeelb@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Wei Yang <richard.weiyang@...il.com>,
        "Kirill A. Shutemov" <kirill@...temov.name>,
        Rong Chen <rong.a.chen@...el.com>,
        Michal Hocko <mhocko@...e.com>,
        Vladimir Davydov <vdavydov.dev@...il.com>, shy828301@...il.com,
        Vlastimil Babka <vbabka@...e.cz>,
        Minchan Kim <minchan@...nel.org>, Qian Cai <cai@....pw>
Subject: Re: [PATCH v18 00/32] per memcg lru_lock: reviews

On Thu, Sep 17, 2020 at 7:26 AM Daniel Jordan
<daniel.m.jordan@...cle.com> wrote:
>
> On Thu, Sep 17, 2020 at 10:37:45AM +0800, Alex Shi wrote:
> > 在 2020/9/16 上午12:58, Daniel Jordan 写道:
> > > On Tue, Sep 15, 2020 at 01:21:56AM -0700, Hugh Dickins wrote:
> > >> On Sun, 13 Sep 2020, Alex Shi wrote:
> > >>> Uh, I updated the testing with some new results here:
> > >>> https://lkml.org/lkml/2020/8/26/212
> > >> Right, I missed that, that's better, thanks.  Any other test results?
> > > Alex, you were doing some will-it-scale runs earlier.  Are you planning to do
> > > more of those?  Otherwise I can add them in.
> >
> > Hi Daniel,
> >
> > Does compaction perf scalable, like thpscale, I except they could get some benefit.
>
> Yep, I plan to stress compaction.  Reclaim as well.
>
> I should have said which Alex I meant.  I was asking Alex Duyck since he'd done
> some will-it-scale runs.

I probably won't be able to do any will-it-scale runs any time soon.
If I recall I ran them for this latest v18 patch set and didn't see
any regressions like I did with the previous set. However the system I
was using is tied up for other purposes and it may be awhile before I
can free it up to look into this again.

Thanks.

- Alex