[PATCH 1/4] cpufreq: Add a cpufreq pressure feedback for the scheduler

Viresh Kumar viresh.kumar at linaro.org
Wed Dec 13 21:43:07 PST 2023


On 12-12-23, 15:27, Vincent Guittot wrote:
> @@ -2618,6 +2663,9 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
>  	policy->max = __resolve_freq(policy, policy->max, CPUFREQ_RELATION_H);
>  	trace_cpu_frequency_limits(policy);
>  
> +	cpus = policy->related_cpus;
> +	cpufreq_update_pressure(cpus, policy->max);
> +
>  	policy->cached_target_freq = UINT_MAX;

One more question, why are you doing this from cpufreq_set_policy ? If
due to cpufreq cooling or from userspace, we end up limiting the
maximum possible frequency, will this routine always get called ?

-- 
viresh



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