linux-kernel - Re: [PATCH v4 07/16] sched/core: uclamp: extend cpu's cgroup controller

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Message-ID: <20180829085358.GO2960@e110439-lin>
Date:   Wed, 29 Aug 2018 09:53:58 +0100
From:   Patrick Bellasi <patrick.bellasi@....com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Tejun Heo <tj@...nel.org>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Vincent Guittot <vincent.guittot@...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 v4 07/16] sched/core: uclamp: extend cpu's cgroup
 controller

On 28-Aug 11:29, Randy Dunlap wrote:
> On 08/28/2018 06:53 AM, Patrick Bellasi wrote:
> > +config UCLAMP_TASK_GROUP
> > +	bool "Utilization clamping per group of tasks"
> > +	depends on CGROUP_SCHED
> > +	depends on UCLAMP_TASK
> > +	default n
> > +	help
> > +	  This feature enables the scheduler to track the clamped utilization
> > +	  of each CPU based on RUNNABLE tasks currently scheduled on that CPU.
> > +
> > +	  When this option is enabled, the user can specify a min and max
> > +	  CPU bandwidth which is allowed for each single task in a group.
> > +	  The max bandwidth allows to clamp the maximum frequency a task
> > +	  can use, while the min bandwidth allows to define a minimum
> > +	  frequency a task will always use.
> > +
> > +	  When task group based utilization clamping is enabled, an eventually
> > +          specified task-specific clamp value is constrained by the cgroup
> > +	  specified clamp value. Both minimum and maximum task clamping cannot
> > +          be bigger than the corresponding clamping defined at task group level.
> 
> The 4 lines above should all be indented the same (one tab + 2 spaces).

Right... then there's definitively something broken with my vim
reformat shortcut, which sometimes uses spaces instead of tabs :(

Unfortunately this pattern is not covered by checkpatch, which
returns not errors/warnings on this patch.

> > +
> > +	  If in doubt, say N.
> > +

Anyway, thanks for spotting it... easy fix for the next respin.

Best,
Patrick

-- 
#include <best/regards.h>

Patrick Bellasi