linux-kernel - Re: [PATCH v10 2/9] cpuset: Add new v2 cpuset.sched.domain

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Date:   Fri, 22 Jun 2018 10:48:41 +0800
From:   Waiman Long <longman@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Tejun Heo <tj@...nel.org>, Li Zefan <lizefan@...wei.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Ingo Molnar <mingo@...hat.com>, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        kernel-team@...com, pjt@...gle.com, luto@...capital.net,
        Mike Galbraith <efault@....de>, torvalds@...ux-foundation.org,
        Roman Gushchin <guro@...com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Patrick Bellasi <patrick.bellasi@....com>
Subject: Re: [PATCH v10 2/9] cpuset: Add new v2 cpuset.sched.domain_root flag

On 06/21/2018 05:27 PM, Peter Zijlstra wrote:
> On Thu, Jun 21, 2018 at 03:58:06PM +0800, Waiman Long wrote:
>> On 06/20/2018 10:27 PM, Peter Zijlstra wrote:
>>> On Mon, Jun 18, 2018 at 12:14:01PM +0800, Waiman Long wrote:
>>>> +  cpuset.sched.domain_root
>>> Why are we calling this a domain_root and not a partition?
>> A partition can consist of several cgroups in a tree structure. That
>> flag should only be set at the root of a partition. I will change the
>> name to partition_root if you think this name is acceptable.
> The flag indicates the 'effective_cpus' things of the current group is a
> partition. The fact that it can have sub-partitions doesn't really
> matter does it.
>
> Just call it 'partition', leave out the whole root stuff, all of cgroup
> is hierarchical and you can have sub-groups we don't go arounOd calling
> everything a root.

OK, will name it "cpuset.sched.partition" in the next version of the
patchset.

Cheers,
Longman