Re: [PATCH 0/3] cpufreq: Replace timers with utilization update callbacks

[Juri Lelli]

Hi Rafael,

On 09/02/16 21:05, Rafael J. Wysocki wrote:

[...]

> +/**
> + * cpufreq_update_util - Take a note about CPU utilization changes.
> + * @util: Current utilization.
> + * @max: Utilization ceiling.
> + *
> + * This function is called by the scheduler on every invocation of
> + * update_load_avg() on the CPU whose utilization is being updated.
> + */
> +void cpufreq_update_util(unsigned long util, unsigned long max)
> +{
> +	struct update_util_data *data;
> +
> +	rcu_read_lock();
> +
> +	data = rcu_dereference(*this_cpu_ptr(&cpufreq_update_util_data));
> +	if (data && data->func)
> +		data->func(data, cpu_clock(smp_processor_id()), util, max);

Are util and max used anywhere? It seems to me that cpu_clock is used by
the callbacks to check if the sampling period is elapsed, but I couldn't
yet find who is using util and max.

Thanks,

- Juri