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Subject: Re: [PATCH] sched: Call update_group_power only for local_group
From: Peter Zijlstra <peterz@infradead.org>
To: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Venkatesh Pallipadi <venki@google.com>,
       LKML <linux-kernel@vger.kernel.org>, Gautham R Shenoy <ego@in.ibm.com>,
       Joel Schopp <jschopp@austin.ibm.com>,
       Michael Neuling <mikey@neuling.org>
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Date: Thu, 08 Jul 2010 19:49:06 +0200
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On Thu, 2010-07-08 at 10:45 -0700, Suresh Siddha wrote:
>  
> @@ -2456,6 +2454,9 @@ static inline void update_sd_lb_stats(struct sched_domain *sd, int this_cpu,
>  	init_sd_power_savings_stats(sd, sds, idle);
>  	load_idx = get_sd_load_idx(sd, idle);
>  
> +	if (this_cpu == smp_processor_id())
> +		update_group_power(sd, this_cpu);
> +
>  	do {
>  		int local_group;

Which will break for nohz_idle_balance..