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

From Ingo Molnar <mingo@kernel.org>
Newsgroups linux.kernel
Subject Re: [PATCH V2 4/4] cpufreq: schedutil: irq-work and mutex are only used in slow path
Date 2016-11-24 06:00 +0100
Message-ID <sGUiB-65P-3@gated-at.bofh.it> (permalink)
References <sDHhT-2vk-7@gated-at.bofh.it> <sDHhU-2vk-19@gated-at.bofh.it>
Organization linux.* mail to news gateway

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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@linaro.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

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[PATCH V2 0/4] cpufreq: schedutil: move slow path from workqueue to SCHED_FIFO task Viresh Kumar <viresh.kumar@linaro.org> - 2016-11-15 09:30 +0100
  [PATCH V2 2/4] cpufreq: schedutil: enable fast switch earlier Viresh Kumar <viresh.kumar@linaro.org> - 2016-11-15 09:30 +0100
  [PATCH V2 4/4] cpufreq: schedutil: irq-work and mutex are only used in slow path Viresh Kumar <viresh.kumar@linaro.org> - 2016-11-15 09:30 +0100
    Re: [PATCH V2 4/4] cpufreq: schedutil: irq-work and mutex are only  used in slow path Ingo Molnar <mingo@kernel.org> - 2016-11-24 06:00 +0100
      Re: [PATCH V2 4/4] cpufreq: schedutil: irq-work and mutex are only  used in slow path Viresh Kumar <viresh.kumar@linaro.org> - 2016-11-24 07:20 +0100
        Re: [PATCH V2 4/4] cpufreq: schedutil: irq-work and mutex are only  used in slow path Ingo Molnar <mingo@kernel.org> - 2016-11-24 07:30 +0100
  [PATCH V2 3/4] cpufreq: schedutil: move slow path from workqueue to SCHED_FIFO task Viresh Kumar <viresh.kumar@linaro.org> - 2016-11-15 09:30 +0100
    Re: [PATCH V2 3/4] cpufreq: schedutil: move slow path from workqueue  to SCHED_FIFO task Peter Zijlstra <peterz@infradead.org> - 2016-11-16 16:30 +0100
      Re: [PATCH V2 3/4] cpufreq: schedutil: move slow path from workqueue to SCHED_FIFO task "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-11-24 02:20 +0100
    Re: [PATCH V2 3/4] cpufreq: schedutil: move slow path from workqueue  to SCHED_FIFO task Ingo Molnar <mingo@kernel.org> - 2016-11-24 06:00 +0100
      Re: [PATCH V2 3/4] cpufreq: schedutil: move slow path from workqueue  to SCHED_FIFO task Viresh Kumar <viresh.kumar@linaro.org> - 2016-11-24 06:20 +0100
  Re: [PATCH V2 0/4] cpufreq: schedutil: move slow path from workqueue  to SCHED_FIFO task Steve Muckle <smuckle.linux@gmail.com> - 2016-11-24 04:10 +0100
    Re: [PATCH V2 0/4] cpufreq: schedutil: move slow path from workqueue  to SCHED_FIFO task Viresh Kumar <viresh.kumar@linaro.org> - 2016-11-24 05:10 +0100

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