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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