Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection

From	Thomas Gleixner <tglx@linutronix.de>
Newsgroups	linux.kernel
Subject	Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection
Date	2015-11-05 19:50 +0100
Message-ID	<qrxLI-1UB-17@gated-at.bofh.it> (permalink)
References	(3 earlier) <qqMWu-5jl-7@gated-at.bofh.it> <qrpOa-5g9-25@gated-at.bofh.it> <qrtI5-7PQ-1@gated-at.bofh.it> <qrtRL-7Tm-11@gated-at.bofh.it> <qruE9-8ru-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, 5 Nov 2015, Arjan van de Ven wrote:
> On 11/5/2015 6:33 AM, Peter Zijlstra wrote:
> 
> > It just grates at me a bit that we have to touch hot paths for such
> scenarios :/
> 
> well we have this as a driver right now that does not touch hot paths,
> but it seems you and tglx also hate that approach with a passion....

Right. It's a horror to deal with tasks which try to impersonate idle
while actually running as highest priority task in the system. We
really want the scheduler to know about it. Yes, we probably have to
pay the price for some extra check in the hot path, but that's way
more sensible than figuring out how 'want to be idle' RT tasks
wreckage the world and some more.

Thanks,

	tglx
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Thread

[RFC PATCH 0/3] CFS idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-03 01:20 +0100
  [RFC PATCH 3/3] sched: introduce synchronized idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-03 01:20 +0100
    Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Peter Zijlstra <peterz@infradead.org> - 2015-11-03 14:40 +0100
      Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-03 15:20 +0100
      Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-03 17:50 +0100
        Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Peter Zijlstra <peterz@infradead.org> - 2015-11-05 11:20 +0100
          Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Arjan van de Ven <arjan@linux.intel.com> - 2015-11-05 15:30 +0100
            Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Peter Zijlstra <peterz@infradead.org> - 2015-11-05 15:40 +0100
              Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Peter Zijlstra <peterz@infradead.org> - 2015-11-05 15:50 +0100
              Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Arjan van de Ven <arjan@linux.intel.com> - 2015-11-05 16:30 +0100
                Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Peter Zijlstra <peterz@infradead.org> - 2015-11-05 18:00 +0100
                Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 20:00 +0100
                Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 19:50 +0100
              Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-05 16:40 +0100
                Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Arjan van de Ven <arjan@linux.intel.com> - 2015-11-05 17:10 +0100
          Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-05 20:30 +0100
            Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-05 20:40 +0100
      Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Peter Zijlstra <peterz@infradead.org> - 2015-11-05 15:10 +0100
        Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-06 00:50 +0100
          Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Peter Zijlstra <peterz@infradead.org> - 2015-11-06 08:50 +0100
            Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-07 01:00 +0100
              Re: [RFC PATCH 3/3] sched: introduce synchronized idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-10 01:30 +0100
  [RFC PATCH 2/3] timer: relax tick stop in idle entry Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-03 01:20 +0100
  Re: [RFC PATCH 0/3] CFS idle injection Eduardo Valentin <edubezval@gmail.com> - 2015-11-04 07:10 +0100
    Re: [RFC PATCH 0/3] CFS idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-04 18:00 +0100
      Re: [RFC PATCH 0/3] CFS idle injection Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2015-11-04 18:10 +0100
        Re: [RFC PATCH 0/3] CFS idle injection Eduardo Valentin <edubezval@gmail.com> - 2015-11-04 19:50 +0100
      Re: [RFC PATCH 0/3] CFS idle injection Peter Zijlstra <peterz@infradead.org> - 2015-11-05 11:20 +0100
        Re: [RFC PATCH 0/3] CFS idle injection Punit Agrawal <punit.agrawal@arm.com> - 2015-11-06 18:00 +0100
          Re: [RFC PATCH 0/3] CFS idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-06 22:00 +0100
            Re: [RFC PATCH 0/3] CFS idle injection Punit Agrawal <punit.agrawal@arm.com> - 2015-11-09 13:00 +0100
              Re: [RFC PATCH 0/3] CFS idle injection Peter Zijlstra <peterz@infradead.org> - 2015-11-09 15:20 +0100
                Re: [RFC PATCH 0/3] CFS idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-09 15:50 +0100
                Re: [RFC PATCH 0/3] CFS idle injection Juri Lelli <juri.lelli@gmail.com> - 2015-11-10 11:10 +0100
                Re: [RFC PATCH 0/3] CFS idle injection Peter Zijlstra <peterz@infradead.org> - 2015-11-10 11:40 +0100
                Re: [RFC PATCH 0/3] CFS idle injection Juri Lelli <juri.lelli@arm.com> - 2015-11-10 12:00 +0100
              Re: [RFC PATCH 0/3] CFS idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-09 15:40 +0100
        Re: [RFC PATCH 0/3] CFS idle injection Dietmar Eggemann <dietmar.eggemann@arm.com> - 2015-11-06 19:40 +0100
          Re: [RFC PATCH 0/3] CFS idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-06 20:20 +0100
            Re: [RFC PATCH 0/3] CFS idle injection Dietmar Eggemann <dietmar.eggemann@arm.com> - 2015-11-06 23:00 +0100
              Re: [RFC PATCH 0/3] CFS idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-09 22:30 +0100
                Re: [RFC PATCH 0/3] CFS idle injection Peter Zijlstra <peterz@infradead.org> - 2015-11-09 22:50 +0100

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