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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-03-19 14:30:02 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-03-21 01:03:08 +0100
commit4296f23ed49a15d36949458adcc66ff993dee2a8 (patch)
treee2c20f28627ea313e6439e4aa5600c3bc48bda96 /kernel
parent97da3854c526d3a6ee05c849c96e48d21527606c (diff)
downloadlinux-4296f23ed49a15d36949458adcc66ff993dee2a8.tar.bz2
cpufreq: schedutil: Fix per-CPU structure initialization in sugov_start()
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: 21ca6d2c52f8 (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+
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched/cpufreq_schedutil.c20
1 files changed, 7 insertions, 13 deletions
diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
index cd7cd489f739..54c577578da6 100644
--- a/kernel/sched/cpufreq_schedutil.c
+++ b/kernel/sched/cpufreq_schedutil.c
@@ -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;
}