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Re: [PATCH v4 6/7] cpufreq: Support for fast frequency switching

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On Wed, Mar 16, 2016 at 4:35 PM, Peter Zijlstra <peterz@infradead.org> wrote:
> On Wed, Mar 16, 2016 at 03:52:28PM +0100, Rafael J. Wysocki wrote:
>> +/**
>> + * cpufreq_enable_fast_switch - Enable fast frequency switching for policy.
>> + * @policy: cpufreq policy to enable fast frequency switching for.
>> + *
>> + * Try to enable fast frequency switching for @policy.
>> + *
>> + * The attempt will fail if there is at least one transition notifier registered
>> + * at this point, as fast frequency switching is quite fundamentally at odds
>> + * with transition notifiers.  Thus if successful, it will make registration of
>> + * transition notifiers fail going forward.
>> + *
>> + * Call under policy->rwsem.
>
> Nobody reads a comment..
>
>> + */
>> +void cpufreq_enable_fast_switch(struct cpufreq_policy *policy)
>> +{
>
>         lockdep_assert_held(&policy->rwsem);
>
> While everybody complains when there's a big nasty splat in their dmesg
> ;-)

OK

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[PATCH v3 0/7] cpufreq: schedutil governor "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-08 04:00 +0100
  [PATCH v3 1/7][Resend] cpufreq: Rework the scheduler hooks for triggering updates "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-08 04:00 +0100
    Re: [PATCH v3 1/7][Resend] cpufreq: Rework the scheduler hooks for  triggering updates Peter Zijlstra <peterz@infradead.org> - 2016-03-09 14:50 +0100
      Re: [PATCH v3 1/7][Resend] cpufreq: Rework the scheduler hooks for  triggering updates "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-09 15:10 +0100
  [PATCH v3 2/7][Resend] cpufreq: Move scheduler-related code to the sched directory "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-08 04:00 +0100
  [PATCH v3 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-08 04:00 +0100
  [PATCH v4 2/7] cpufreq: governor: New data type for management part of dbs_data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 16:10 +0100
  [PATCH v4 1/7] cpufreq: sched: Helpers to add and remove update_util hooks "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 16:10 +0100
  [PATCH v4 4/7] cpufreq: Move governor attribute set headers to cpufreq.h "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 16:10 +0100
  [PATCH v4 0/7] cpufreq: schedutil governor "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 16:10 +0100
    [PATCH v4 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 16:10 +0100
      Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-16 18:40 +0100
        Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 22:50 +0100
      Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-16 18:40 +0100
        Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 22:40 +0100
      Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-16 19:00 +0100
        Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 22:50 +0100
      Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-16 19:00 +0100
        Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 22:40 +0100
          Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-16 23:40 +0100
      Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-16 19:20 +0100
        Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 22:40 +0100
          Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-16 23:50 +0100
            Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-17 00:00 +0100
    [PATCH v4 3/7] cpufreq: governor: Move abstract gov_attr_set code to seperate file "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 16:10 +0100
    [PATCH v4 6/7] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 16:10 +0100
      Re: [PATCH v4 6/7] cpufreq: Support for fast frequency switching Peter Zijlstra <peterz@infradead.org> - 2016-03-16 16:40 +0100
        Re: [PATCH v4 6/7] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-16 18:00 +0100
      Re: [PATCH v4 6/7] cpufreq: Support for fast frequency switching Peter Zijlstra <peterz@infradead.org> - 2016-03-16 16:50 +0100
        Re: [PATCH v4 6/7] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-16 18:00 +0100
    [PATCH v4 5/7] cpufreq: Move governor symbols to cpufreq.h "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 16:10 +0100
    Re: [PATCH v4 0/7] cpufreq: schedutil governor Peter Zijlstra <peterz@infradead.org> - 2016-03-16 16:30 +0100
      Re: [PATCH v4 0/7] cpufreq: schedutil governor "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-16 17:30 +0100
    [PATCH v5 6/7][Update] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-17 01:00 +0100
      Re: [PATCH v5 6/7][Update] cpufreq: Support for fast frequency  switching Juri Lelli <juri.lelli@arm.com> - 2016-03-17 12:40 +0100
        Re: [PATCH v5 6/7][Update] cpufreq: Support for fast frequency  switching Juri Lelli <juri.lelli@arm.com> - 2016-03-17 12:50 +0100
          Re: [PATCH v5 6/7][Update] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-17 14:00 +0100
        Re: [PATCH v5 6/7][Update] cpufreq: Support for fast frequency  switching Peter Zijlstra <peterz@infradead.org> - 2016-03-17 12:50 +0100
    [PATCH v5 7/7][Update] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-17 01:00 +0100
      Re: [PATCH v5 7/7][Update] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-17 12:40 +0100
        Re: [PATCH v5 7/7][Update] cpufreq: schedutil: New governor based on  scheduler utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-17 14:00 +0100
      Re: [PATCH v5 7/7][Update] cpufreq: schedutil: New governor based on  scheduler utilization data Juri Lelli <juri.lelli@arm.com> - 2016-03-17 12:40 +0100
        Re: [PATCH v5 7/7][Update] cpufreq: schedutil: New governor based on  scheduler utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-17 14:00 +0100
    [PATCH v6 6/7][Update] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-17 17:00 +0100
    [PATCH v6 7/7][Update] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-17 17:10 +0100

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