linux-kernel - Re: [PATCH v9 12/16] sched/core: uclamp: Extend CPU's cgroup controller

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Message-ID: <20190605144450.GN374014@devbig004.ftw2.facebook.com>
Date:   Wed, 5 Jun 2019 07:44:50 -0700
From:   Tejun Heo <tj@...nel.org>
To:     Patrick Bellasi <patrick.bellasi@....com>
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-api@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Paul Turner <pjt@...gle.com>,
        Quentin Perret <quentin.perret@....com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Todd Kjos <tkjos@...gle.com>,
        Joel Fernandes <joelaf@...gle.com>,
        Steve Muckle <smuckle@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>
Subject: Re: [PATCH v9 12/16] sched/core: uclamp: Extend CPU's cgroup
 controller

Hello,

On Wed, Jun 05, 2019 at 03:39:50PM +0100, Patrick Bellasi wrote:
> Which means we will enforce the effective values as:
> 
>    /tg1/tg11:
> 
>          util_min.effective=0
>             i.e. keep the child protection since smaller than parent
> 
>          util_max.effective=800
>             i.e. keep parent limit since stricter than child
>
> Please shout if I got it wrong, otherwise I'll update v10 to
> implement the above logic.

Everything sounds good to me.  Please note that cgroup interface files
actually use literal "max" for limit/protection max settings so that 0
and "max" mean the same things for all limit/protection knobs.

Thanks.

-- 
tejun