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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 12 Jul 2019 17:11:25 +0800
From:   王贇 <yun.wang@...ux.alibaba.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     hannes@...xchg.org, mhocko@...nel.org, vdavydov.dev@...il.com,
        Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, mcgrof@...nel.org, keescook@...omium.org,
        linux-fsdevel@...r.kernel.org, cgroups@...r.kernel.org,
        Mel Gorman <mgorman@...e.de>, riel@...riel.com
Subject: Re: [PATCH 1/4] numa: introduce per-cgroup numa balancing locality,
 statistic



On 2019/7/12 下午3:58, Peter Zijlstra wrote:
[snip]
>>>
>>> Then our task t1 should be accounted to B (as you do), but also to A and
>>> R.
>>
>> I get the point but not quite sure about this...
>>
>> Not like pages there are no hierarchical limitation on locality, also tasks
> 
> You can use cpusets to affect that.

Could you please give more detail on this?

> 
>> running in a particular group have no influence to others, not to mention the
>> extra overhead, does it really meaningful to account the stuff hierarchically?
> 
> AFAIU it's a requirement of cgroups to be hierarchical. All our other
> cgroup accounting is like that.

Ok, should respect the convention :-)

Regards,
Michael Wang

>