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Re: [PATCH] sched/cpufreq: don't trigger cpufreq update w/o real rt/deadline tasks running

From Peter Zijlstra <peterz@infradead.org>
Newsgroups linux.kernel
Subject Re: [PATCH] sched/cpufreq: don't trigger cpufreq update w/o real rt/deadline tasks running
Date 2016-04-20 16:10 +0200
Message-ID <rq0Zj-Go-9@gated-at.bofh.it> (permalink)
References <rpao1-n7-1@gated-at.bofh.it> <rpObM-7pt-13@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Wed, Apr 20, 2016 at 02:32:35AM +0200, Rafael J. Wysocki wrote:
> On Monday, April 18, 2016 01:51:24 PM Wanpeng Li wrote:
> > Sometimes update_curr() is called w/o tasks actually running, it is
> > captured by: 
> > 	u64 delta_exec = rq_clock_task(rq) - curr->se.exec_start;
> > We should not trigger cpufreq update in this case for rt/deadline
> > classes, and this patch fix it.
> > 
> > Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
> 
> The signed-off-by tag should agree with the From: header.  One way to achieve
> that is to add an extra From: line at the start of the changelog.
> 
> That said, this looks like a good catch that should go into 4.6 to me.
> 
> Peter, what do you think?

I'm confused by the Changelog. *what* ?

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[PATCH] sched/cpufreq: don't trigger cpufreq update w/o real rt/deadline tasks running Wanpeng Li <kernellwp@gmail.com> - 2016-04-18 08:00 +0200
  Re: [PATCH] sched/cpufreq: don't trigger cpufreq update w/o real rt/deadline tasks running "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-04-20 02:30 +0200
    Re: [PATCH] sched/cpufreq: don't trigger cpufreq update w/o real  rt/deadline tasks running Wanpeng Li <kernellwp@gmail.com> - 2016-04-20 02:50 +0200
    Re: [PATCH] sched/cpufreq: don't trigger cpufreq update w/o real  rt/deadline tasks running Peter Zijlstra <peterz@infradead.org> - 2016-04-20 16:10 +0200
      Re: [PATCH] sched/cpufreq: don't trigger cpufreq update w/o real  rt/deadline tasks running "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> - 2016-04-21 00:30 +0200
        Re: [PATCH] sched/cpufreq: don't trigger cpufreq update w/o real  rt/deadline tasks running Wanpeng Li <kernellwp@gmail.com> - 2016-04-21 03:10 +0200
          Re: [PATCH] sched/cpufreq: don't trigger cpufreq update w/o real  rt/deadline tasks running "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> - 2016-04-21 13:20 +0200
            Re: [PATCH] sched/cpufreq: don't trigger cpufreq update w/o real  rt/deadline tasks running Wanpeng Li <kernellwp@gmail.com> - 2016-04-21 14:20 +0200
              Re: [PATCH] sched/cpufreq: don't trigger cpufreq update w/o real  rt/deadline tasks running Wanpeng Li <kernellwp@gmail.com> - 2016-04-21 14:30 +0200
          Re: [PATCH] sched/cpufreq: don't trigger cpufreq update w/o real  rt/deadline tasks running Peter Zijlstra <peterz@infradead.org> - 2016-04-21 14:40 +0200
            Re: [PATCH] sched/cpufreq: don't trigger cpufreq update w/o real  rt/deadline tasks running Wanpeng Li <kernellwp@gmail.com> - 2016-04-21 15:40 +0200
            Re: [PATCH] sched/cpufreq: don't trigger cpufreq update w/o real  rt/deadline tasks running "Rafael J. Wysocki" <rafael@kernel.org> - 2016-04-21 19:10 +0200
              Re: [PATCH] sched/cpufreq: don't trigger cpufreq update w/o real  rt/deadline tasks running Peter Zijlstra <peterz@infradead.org> - 2016-04-21 19:20 +0200
      Re: [PATCH] sched/cpufreq: don't trigger cpufreq update w/o real  rt/deadline tasks running Wanpeng Li <kernellwp@gmail.com> - 2016-04-21 00:30 +0200

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