Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers

From	Ingo Molnar <mingo@kernel.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers
Date	2015-08-24 09:50 +0200
Message-ID	<q0UFX-1fv-7@gated-at.bofh.it> (permalink)
References	<pXci5-4fP-5@gated-at.bofh.it> <q0wkj-8c-3@gated-at.bofh.it> <q0G0h-5G2-1@gated-at.bofh.it> <q0TJU-8m0-9@gated-at.bofh.it> <q0UmC-SN-37@gated-at.bofh.it>
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* Mike Galbraith <umgwanakikbuti@gmail.com> wrote:

> On Mon, 2015-08-24 at 08:44 +0200, Ingo Molnar wrote:
> 
> > the 'housekeeping CPU' is essentially the boot CPU. Yet we dedicate a full mask to 
> > it (housekeeping_mask - a variable mask to begin with) and recover the 
> > housekeeping CPU via:
> > 
> > +       return cpumask_any_and(housekeeping_mask, cpu_online_mask);
> 
> There can be, and had better be if box is big, multiple housekeepers.

Yes - but that does not seem to be possible via the code right now AFAICS, so at 
minimum it's incomplete.

Thanks,

	Ingo
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Thread

Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Ingo Molnar <mingo@kernel.org> - 2015-08-23 07:50 +0200
  Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-08-23 18:10 +0200
    Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Frederic Weisbecker <fweisbec@gmail.com> - 2015-08-24 03:30 +0200
    Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Ingo Molnar <mingo@kernel.org> - 2015-08-24 08:50 +0200
      Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to  housekeepers Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-08-24 09:30 +0200
        Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Ingo Molnar <mingo@kernel.org> - 2015-08-24 09:50 +0200
          Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to  housekeepers Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-08-24 10:00 +0200
            Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Ingo Molnar <mingo@kernel.org> - 2015-08-24 10:10 +0200
      Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Frederic Weisbecker <fweisbec@gmail.com> - 2015-08-24 15:40 +0200
        Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to  housekeepers Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-08-24 16:10 +0200
        Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Ingo Molnar <mingo@kernel.org> - 2015-08-25 10:30 +0200
          Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Frederic Weisbecker <fweisbec@gmail.com> - 2015-08-25 15:50 +0200
            Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Ingo Molnar <mingo@kernel.org> - 2015-08-28 10:40 +0200
              Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Frederic Weisbecker <fweisbec@gmail.com> - 2015-08-28 14:40 +0200
      Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-08-24 16:00 +0200
        Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Frederic Weisbecker <fweisbec@gmail.com> - 2015-08-24 16:10 +0200
          Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-08-24 17:50 +0200
  Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Frederic Weisbecker <fweisbec@gmail.com> - 2015-08-24 03:50 +0200

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