linux-kernel - Re: [PATCH V2 4/4] cpufreq: schedutil: irq-work and mutex are only used in slow path

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Message-ID: <20161124045337.GB18417@gmail.com>
Date:   Thu, 24 Nov 2016 05:53:37 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Rafael Wysocki <rjw@...ysocki.net>, Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        linaro-kernel@...ts.linaro.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Juri Lelli <Juri.Lelli@....com>,
        Robin Randhawa <robin.randhawa@....com>,
        Steve Muckle <smuckle.linux@...il.com>
Subject: Re: [PATCH V2 4/4] cpufreq: schedutil: irq-work and mutex are only
 used in slow path


Firstly, please start changes to scheduler code with a verb. This title:

  Subject: Re: [PATCH V2 4/4] cpufreq: schedutil: irq-work and mutex are only used in slow path

is totally inadequate as it's a statement that says nothing about the _change_.

What does the patch do? Does it add, remove, modify, fix or clean up?

* Viresh Kumar <viresh.kumar@...aro.org> wrote:

> Execute the irq-work specific initialization/exit code only when the
> fast path isn't available.

Is this an optimization? A correctness fix?

Thanks,

	Ingo