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

From	Mike Galbraith <umgwanakikbuti@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers
Date	2015-08-24 16:10 +0200
Message-ID	<q10BI-1vm-19@gated-at.bofh.it> (permalink)
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On Mon, 2015-08-24 at 15:36 +0200, Frederic Weisbecker wrote:
> On Mon, Aug 24, 2015 at 08:44:12AM +0200, Ingo Molnar wrote:
> > 2)
> > 
> > What happens if the boot CPU is offlined? (under CONFIG_BOOTPARAM_HOTPLUG_CPU0=y)
> > 
> > I don't see CPU hotplug callbacks fixing up the housekeeping_mask if the boot CPU 
> > is offlined.
> 
> We have tick_nohz_cpu_down_callback() which makes sure that the timekeeper, which
> is the boot CPU in nohz full, never gets offlined.

Aha.. and it works fine too.  (CPU0 told me to go away earlier;)

	-Mike

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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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