linux-kernel - Re: [PATCH 2/4] sched: cpufreq: Keep track of cpufreq utilization update flags

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Message-ID: <20171219032217.GN19815@vireshk-i7>
Date:   Tue, 19 Dec 2017 08:52:17 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Joel Fernandes <joelaf@...gle.com>
Cc:     Patrick Bellasi <patrick.bellasi@....com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Linux PM <linux-pm@...r.kernel.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>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/4] sched: cpufreq: Keep track of cpufreq utilization
 update flags

On 18-12-17, 19:18, Joel Fernandes wrote:
> Hi Viresh,
> 
> On Mon, Dec 18, 2017 at 7:12 PM, Viresh Kumar <viresh.kumar@...aro.org> wrote:
> > On 18-12-17, 12:14, Patrick Bellasi wrote:
> >> For example, swithing from:
> >>
> >>  - void (*func)(struct update_util_data *data, u64 time,
> >>  -              unsigned int flags))
> >>  + void (*func)(struct update_util_data *data, u64 time,
> >>  +              unsigned int flags, bool set))
> >>
> >> Where the additional boolean is actually used to define which
> >> operation we wanna perform on the flags?
> >
> > The code will eventually have the same complexity or ugliness in both
> > the cases. I would like to start with another flag for now and see if
> > people prefer another parameter.
> 
> Though I think that will solve Rafael's concern of polluting the flags
> for something schedutil specific. I also feel adding extra callback
> parameter is cleaner than 2 new clear flags.

Okay, I will then wait for Rafael to come online and comment on what
he would prefer before posting.

-- 
viresh