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Re: [patch v3.18+ regression fix] sched: Further improve spurious CPU_IDLE active migrations

From Mike Galbraith <umgwanakikbuti@gmail.com>
Newsgroups linux.kernel
Subject Re: [patch v3.18+ regression fix] sched: Further improve spurious CPU_IDLE active migrations
Date 2016-09-01 08:40 +0200
Message-ID <sctPk-5ek-15@gated-at.bofh.it> (permalink)
References (1 earlier) <scaCZ-13d-1@gated-at.bofh.it> <scaMF-17E-23@gated-at.bofh.it> <scb61-1h3-33@gated-at.bofh.it> <scg5I-4hl-15@gated-at.bofh.it> <scrDP-3oN-1@gated-at.bofh.it>
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On Thu, 2016-09-01 at 06:11 +0200, Mike Galbraith wrote:

> I don't see a great alternative to turning it off off the top of my
> head, at least for processors with multiple LLCs.

Here of course I mean other than saying it's just not worth worrying
about such old processors, iff it's only old dogs that are affected. 

Ignore it, they're dinosaurs is a valid option.  I really doubt there
are oodles of such boxen in active use out in the real world.. if there
were, surely there would be gripes, which afaik has not happened.

	-Mike

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[patch v3.18+ regression fix] sched: Further improve spurious  CPU_IDLE active migrations Mike Galbraith <mgalbraith@suse.de> - 2016-08-30 07:50 +0200
  Re: [patch v3.18+ regression fix] sched: Further improve spurious  CPU_IDLE active migrations Peter Zijlstra <peterz@infradead.org> - 2016-08-31 12:10 +0200
    Re: [patch v3.18+ regression fix] sched: Further improve spurious  CPU_IDLE active migrations Mike Galbraith <mgalbraith@suse.de> - 2016-08-31 12:20 +0200
      Re: [patch v3.18+ regression fix] sched: Further improve spurious  CPU_IDLE active migrations Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-08-31 12:40 +0200
        Re: [patch v3.18+ regression fix] sched: Further improve spurious  CPU_IDLE active migrations Vincent Guittot <vincent.guittot@linaro.org> - 2016-08-31 18:00 +0200
          Re: [patch v3.18+ regression fix] sched: Further improve spurious  CPU_IDLE active migrations Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-09-01 06:20 +0200
            Re: [patch v3.18+ regression fix] sched: Further improve spurious  CPU_IDLE active migrations Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-09-01 08:40 +0200
            Re: [patch v3.18+ regression fix] sched: Further improve spurious  CPU_IDLE active migrations Vincent Guittot <vincent.guittot@linaro.org> - 2016-09-01 10:20 +0200
              [v2 patch v3.18+ regression fix] sched: Further improve spurious  CPU_IDLE active migrations Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-09-05 18:30 +0200
                Re: [v2 patch v3.18+ regression fix] sched: Further improve  spurious CPU_IDLE active migrations Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-09-06 15:10 +0200
                Re: [v2 patch v3.18+ regression fix] sched: Further improve  spurious CPU_IDLE active migrations Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-09-06 15:50 +0200
                Re: [v2 patch v3.18+ regression fix] sched: Further improve spurious  CPU_IDLE active migrations Vincent Guittot <vincent.guittot@linaro.org> - 2016-09-06 15:50 +0200
                Re: [v2 patch v3.18+ regression fix] sched: Further improve  spurious CPU_IDLE active migrations Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-09-06 16:10 +0200
                Re: [v2 patch v3.18+ regression fix] sched: Further improve spurious  CPU_IDLE active migrations Vincent Guittot <vincent.guittot@linaro.org> - 2016-09-06 15:10 +0200

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