linux-kernel - Re: [PATCH 1/4] numa: introduce per-cgroup numa balancing locality, statistic

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Message-ID: <20190715121025.GN9035@blackbody.suse.cz>
Date:   Mon, 15 Jul 2019 14:10:25 +0200
From:   Michal Koutný <mkoutny@...e.com>
To:     王贇 <yun.wang@...ux.alibaba.com>
Cc:     Peter Zijlstra <peterz@...radead.org>, keescook@...omium.org,
        hannes@...xchg.org, vdavydov.dev@...il.com, mcgrof@...nel.org,
        mhocko@...nel.org, linux-mm@...ck.org,
        Ingo Molnar <mingo@...hat.com>, riel@...riel.com,
        Mel Gorman <mgorman@...e.de>, cgroups@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] numa: introduce per-cgroup numa balancing locality,
 statistic

Hello Yun.

On Fri, Jul 12, 2019 at 06:10:24PM +0800, 王贇  <yun.wang@...ux.alibaba.com> wrote:
> Forgive me but I have no idea on how to combined this
> with memory cgroup's locality hierarchical update...
> parent memory cgroup do not have influence on mems_allowed
> to it's children, correct?
I'd recommend to look at the v2 of the cpuset controller that implements
the hierarchical behavior among configured memory node sets.

(My comment would better fit to 
    [PATCH 3/4] numa: introduce numa group per task group
IIUC, you could use cpuset controller to constraint memory nodes.)

For the second part (accessing numa statistics, i.e. this patch), I
wonder wheter this information wouldn't be better presented under the
cpuset controller too.

HTH,
Michal