linux-kernel - Re: [RFC PATCH 0/5] cgroup/cpuset: A new "isolcpus" paritition

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Message-ID: <ZDdG1K0kTETZMTCu@slm.duckdns.org>
Date:   Wed, 12 Apr 2023 14:03:32 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Waiman Long <longman@...hat.com>
Cc:     Zefan Li <lizefan.x@...edance.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Jonathan Corbet <corbet@....net>,
        Shuah Khan <shuah@...nel.org>, linux-kernel@...r.kernel.org,
        cgroups@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kselftest@...r.kernel.org,
        Juri Lelli <juri.lelli@...hat.com>,
        Valentin Schneider <vschneid@...hat.com>,
        Frederic Weisbecker <frederic@...nel.org>
Subject: Re: [RFC PATCH 0/5] cgroup/cpuset: A new "isolcpus" paritition

Hello,

On Wed, Apr 12, 2023 at 04:33:29PM -0400, Waiman Long wrote:
> I think we can. You mean having a new "cpuset.cpus.isolated" cgroupfs file.
> So there will be one in the root cgroup that defines all the isolated CPUs
> one can have. It is then distributed down the hierarchy and can be claimed
> only if a cgroup becomes an "isolated" partition. There will be a slight

Yeah, that seems a lot more congruent with the typical pattern.

> change in the semantics of an "isolated" partition, but I doubt there will
> be much users out there.

I haven't thought through it too hard but what prevents staying compatible
with the current behavior?

> If you are OK with this approach, I can modify my patch series to do that.

Thanks.

-- 
tejun