linux-kernel - Re: [RFC PATCH v1 3/8] sched/cpufreq_schedutil: make worker kthread be SCHED

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Date:   Fri, 7 Jul 2017 15:07:09 -0700
From:   Joel Fernandes <joelaf@...gle.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Juri Lelli <juri.lelli@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Luca Abeni <luca.abeni@...tannapisa.it>,
        claudio@...dence.eu.com,
        Tommaso Cucinotta <tommaso.cucinotta@...tannapisa.it>,
        bristot@...hat.com, Mathieu Poirier <mathieu.poirier@...aro.org>,
        Todd Kjos <tkjos@...roid.com>,
        Andres Oportus <andresoportus@...gle.com>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Patrick Bellasi <patrick.bellasi@....com>,
        Ingo Molnar <mingo@...nel.org>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>
Subject: Re: [RFC PATCH v1 3/8] sched/cpufreq_schedutil: make worker kthread
 be SCHED_DEADLINE

Hi,

On Fri, Jul 7, 2017 at 2:58 PM, Steven Rostedt <rostedt@...dmis.org> wrote:
> On Fri, 07 Jul 2017 15:11:45 +0200
> "Rafael J. Wysocki" <rjw@...ysocki.net> wrote:
>
>> On Friday, July 07, 2017 11:53:16 AM Juri Lelli wrote:
>> > On 07/07/17 12:46, Thomas Gleixner wrote:
>> > > On Fri, 7 Jul 2017, Juri Lelli wrote:
>> > > > How about SCHED_FLAG_SUGOV then?
>> > >
>> > > I know sugo della carne, but what's sugo V?
>> > >
>> >
>> > Right.. can't really help not thinking about the same (especially close
>> > to lunch) :)
>> >
>> > But the abbreviation stands for SchedUtil GOVernor (AFAIK). We already
>> > have a SUGOV_KTHREAD_PRIORITY (that I just noticed I need to remove BTW)
>> > in sched/cpufreq_schedutil.c.
>>
>> SCHED_FLAG_CPUFREQ_WORKER comes to mind, but it's somewhat long.
>>
>
> It is rather long. Although I actually hate the SUGOV, it is easily
> grepable. Just comment what it stands for. We can always change it
> later.

I was thinking why not just SCHED_FLAG_CPUFREQ. That says its for
cpufreq purposes, and is a bit self-documenting. "WORKER" is a bit
redundant and can be dropped in my opinion.

thanks,

-Joel