| Date | Wed, 2 Jan 2013 15:30:24 +0000 | From | Christoph Lameter <> | Subject | Re: [PATCH 07/27] nohz: Assign timekeeping duty to a non-full-nohz CPU |
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On Sat, 29 Dec 2012, Frederic Weisbecker wrote:
> @@ -163,6 +164,8 @@ static int __init tick_nohz_full_setup(char *str) > return 1; > } > __setup("full_nohz=", tick_nohz_full_setup); > +#else > +#define have_full_nohz_mask (0) > #endif > > /* > @@ -512,6 +515,10 @@ static bool can_stop_idle_tick(int cpu, struct tick_sched *ts) > return false; > } > > + /* If there are full nohz CPUs around, we need to keep the timekeeping duty */ > + if (have_full_nohz_mask && tick_do_timer_cpu == cpu) > + return false; > + > return true; > } > >
Ok so I guess this means that if I setup all cpus as nohz then a random one will continue to do timekeeping?
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