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cpufreq: schedutil: Fix per-CPU structure initialization in sugov_start()

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sugov_start() only initializes struct sugov_cpu per-CPU structures
for shared policies, but it should do that for single-CPU policies too.

That in particular makes the IO-wait boost mechanism work in the
cases when cpufreq policies correspond to individual CPUs.

Fixes: 21ca6d2c52 (cpufreq: schedutil: Add iowait boosting)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: 4.9+ <stable@vger.kernel.org> # 4.9+
This commit is contained in:
Rafael J. Wysocki 2017-03-19 14:30:02 +01:00
parent 97da3854c5
commit 4296f23ed4
1 changed files with 7 additions and 13 deletions
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20
kernel/sched/cpufreq_schedutil.c
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@ -584,20 +584,14 @@ static int sugov_start(struct cpufreq_policy *policy)
for_each_cpu(cpu, policy->cpus) {
struct sugov_cpu *sg_cpu = &per_cpu(sugov_cpu, cpu);
memset(sg_cpu, 0, sizeof(*sg_cpu));
sg_cpu->sg_policy = sg_policy;
if (policy_is_shared(policy)) {
sg_cpu->util = 0;
sg_cpu->max = 0;
sg_cpu->flags = SCHED_CPUFREQ_RT;
sg_cpu->last_update = 0;
sg_cpu->iowait_boost = 0;
sg_cpu->iowait_boost_max = policy->cpuinfo.max_freq;
cpufreq_add_update_util_hook(cpu, &sg_cpu->update_util,
sugov_update_shared);
} else {
cpufreq_add_update_util_hook(cpu, &sg_cpu->update_util,
sugov_update_single);
}
sg_cpu->flags = SCHED_CPUFREQ_RT;
sg_cpu->iowait_boost_max = policy->cpuinfo.max_freq;
cpufreq_add_update_util_hook(cpu, &sg_cpu->update_util,
policy_is_shared(policy) ?
sugov_update_shared :
sugov_update_single);
}
return 0;
}