Re: [PATCH 09/10] nohz: Switch nohz full timekeeper to dynticks idle on top of sysidle detection

[Peter Zijlstra]

On Mon, Jul 28, 2014 at 07:37:35PM +0200, Frederic Weisbecker wrote:

> @@ -745,7 +747,7 @@ static bool can_stop_idle_tick(int cpu, struct tick_sched *ts)
>  		 * if there are full dynticks CPUs around
>  		 */
>  		if (tick_do_timer_cpu == cpu)
> -			return false;
> +			return rcu_sys_is_idle();
>  	}

I still feel its entirely upside down to rely on RCU for this...
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