linux-kernel - Re: [PATCH v3 0/6] cpufreq: schedutil: fixes for flags updates

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Message-ID: <20180206183623.GH5739@e110439-lin>
Date:   Tue, 6 Feb 2018 18:36:24 +0000
From:   Patrick Bellasi <patrick.bellasi@....com>
To:     Claudio Scordino <claudio@...dence.eu.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        Ingo Molnar <mingo@...hat.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Todd Kjos <tkjos@...roid.com>,
        Joel Fernandes <joelaf@...gle.com>
Subject: Re: [PATCH v3 0/6] cpufreq: schedutil: fixes for flags updates

On 06-Feb 19:14, Claudio Scordino wrote:
> Hi Patrick,

> >At first glance, your proposal below makes to make sense.
> >
> >However, I'm wondering if we cannot get it working using
> >rq->dl's provided information instead of flags?
> 
> Yes, we can use the value of rq->dl to check if there has been an increase of the deadline utilization.
> Even if schedutil might have been triggered by a different scheduling class, the effect should be almost the same.
> 
> Below a potential patch. I've kept all frequency update decisions in a single point (i.e. sugov_should_update_freq).
> Not yet tested (waiting for further comments).

I have a todo list entry to backport/test Peter's series on Android...
will add this patch too. Thanks.

-- 
#include <best/regards.h>

Patrick Bellasi