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Re: [PATCH 4/7 v3] sched: propagate load during synchronous attach/detach

From Peter Zijlstra <peterz@infradead.org>
Newsgroups linux.kernel
Subject Re: [PATCH 4/7 v3] sched: propagate load during synchronous attach/detach
Date 2016-09-15 20:00 +0200
Message-ID <shJ74-1GD-23@gated-at.bofh.it> (permalink)
References <sgua5-jn-5@gated-at.bofh.it> <sgua5-jn-13@gated-at.bofh.it> <shEK6-7vq-23@gated-at.bofh.it> <shGCe-dP-45@gated-at.bofh.it> <shINI-1zt-31@gated-at.bofh.it>
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On Thu, Sep 15, 2016 at 06:36:53PM +0100, Dietmar Eggemann wrote:

> > We did however loose a lot on why and how min(1, runnable_avg) is a
> > sensible thing to do...
> 
> Do you refer to the big comment on top of this if condition in the old
> code in __update_group_entity_contrib()? The last two subsections of it
> I never understood ...
> 
> [...]

Read the thread here:

  http://www.gossamer-threads.com/lists/linux/kernel/1558210

But Vince's explanation earlier is also good.

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Thread

[PATCH 4/7 v3] sched: propagate load during synchronous attach/detach Vincent Guittot <vincent.guittot@linaro.org> - 2016-09-12 09:50 +0200
  Re: [PATCH 4/7 v3] sched: propagate load during synchronous  attach/detach Peter Zijlstra <peterz@infradead.org> - 2016-09-15 15:10 +0200
    Re: [PATCH 4/7 v3] sched: propagate load during synchronous attach/detach Vincent Guittot <vincent.guittot@linaro.org> - 2016-09-15 15:20 +0200
  Re: [PATCH 4/7 v3] sched: propagate load during synchronous  attach/detach Peter Zijlstra <peterz@infradead.org> - 2016-09-15 15:10 +0200
    Re: [PATCH 4/7 v3] sched: propagate load during synchronous attach/detach Vincent Guittot <vincent.guittot@linaro.org> - 2016-09-15 15:10 +0200
  Re: [PATCH 4/7 v3] sched: propagate load during synchronous  attach/detach Dietmar Eggemann <dietmar.eggemann@arm.com> - 2016-09-15 15:20 +0200
    Re: [PATCH 4/7 v3] sched: propagate load during synchronous attach/detach Vincent Guittot <vincent.guittot@linaro.org> - 2016-09-15 16:40 +0200
      Re: [PATCH 4/7 v3] sched: propagate load during synchronous  attach/detach Dietmar Eggemann <dietmar.eggemann@arm.com> - 2016-09-15 19:30 +0200
    Re: [PATCH 4/7 v3] sched: propagate load during synchronous  attach/detach Peter Zijlstra <peterz@infradead.org> - 2016-09-15 17:20 +0200
      Re: [PATCH 4/7 v3] sched: propagate load during synchronous  attach/detach Dietmar Eggemann <dietmar.eggemann@arm.com> - 2016-09-15 19:40 +0200
        Re: [PATCH 4/7 v3] sched: propagate load during synchronous  attach/detach Peter Zijlstra <peterz@infradead.org> - 2016-09-15 20:00 +0200
  Re: [PATCH 4/7 v3] sched: propagate load during synchronous  attach/detach Peter Zijlstra <peterz@infradead.org> - 2016-09-15 16:50 +0200
    Re: [PATCH 4/7 v3] sched: propagate load during synchronous attach/detach Vincent Guittot <vincent.guittot@linaro.org> - 2016-09-15 17:00 +0200
  Re: [PATCH 4/7 v3] sched: propagate load during synchronous attach/detach Wanpeng Li <kernellwp@gmail.com> - 2016-09-19 05:20 +0200

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