Re: [RFC][PATCH 3/7] sched: power: go_faster/slower power driver hints

[Michael wang <wangyun@linux.vnet.ibm.com>]

Hi, Morten

On 10/12/2013 01:19 AM, Morten Rasmussen wrote:
[snip]
>  
> @@ -5743,6 +5772,7 @@ static void run_rebalance_domains(struct softirq_action *h)
>  	 */
>  	nohz_idle_balance(this_cpu, idle);
>  
> +	inc_cpu_capacity(this_cpu);

Just wondering is this check necessary here? if rq get more tasks during
the balance, enqueue_task() should already do the check each time when
we move_task(), isn't it?

Regards,
Michael Wang

>  	power_late_callback(this_cpu);
>  }
>  
> diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
> index 907a967..88e7968 100644
> --- a/kernel/sched/sched.h
> +++ b/kernel/sched/sched.h
> @@ -1367,8 +1367,26 @@ static inline u64 irq_time_read(int cpu)
>  
>  #ifdef CONFIG_SCHED_POWER
>  extern void power_late_callback(int cpu);
> +extern int at_max_capacity(int cpu);
> +extern int go_faster(int cpu, int hint);
> +extern int go_slower(int cpu, int hint);
>  #else
>  static inline void power_late_callback(int cpu)
>  {
>  }
> +
> +static inline int at_max_capacity(int cpu)
> +{
> +	return 1;
> +}
> +
> +static inline int go_faster(int cpu, int hint)
> +{
> +	return 0;
> +}
> +
> +static inline int go_slower(int cpu, int hint)
> +{
> +	return 0;
> +}
>  #endif /* CONFIG_SCHED_POWER */
>