Since:
4296f23ed cpufreq: schedutil: Fix per-CPU structure initialization in
sugov_start()
We lost the value of sg_cpu->cpu which is assigned during
sugov_register. The memset in sugov_start overwrites it with zero.
This leads to always looking at the utilization of CPU0 instead of
the one we just updated when we do a utilization update callback.
Let's fix this by consolidating the initialization code into
sugov_start().
Fixes: 4296f23ed49a ("cpufreq: schedutil: Fix per-CPU structure initialization in sugov_start()")
Signed-off-by: Chris Redpath <chris.redpath@xxxxxxx>
Reviewed-by: Patrick Bellasi <patrick.bellasi@xxxxxxx>
Reviewed-by: Brendan Jackman <brendan.jackman@xxxxxxx>
Cc: Rafael J. Wysocki <rjw@xxxxxxxxxxxxx>
Cc: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: 4.9+ <stable@xxxxxxxxxxxxxxx>
---
kernel/sched/cpufreq_schedutil.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
index 6c1a7fcfa2a7..eeb7e0a1d861 100644
--- a/kernel/sched/cpufreq_schedutil.c
+++ b/kernel/sched/cpufreq_schedutil.c
@@ -731,6 +731,7 @@ static int sugov_start(struct cpufreq_policy *policy)
sg_cpu->sg_policy = sg_policy;
sg_cpu->flags = SCHED_CPUFREQ_RT;
sg_cpu->iowait_boost_max = policy->cpuinfo.max_freq;
+ sg_cpu->cpu = cpu;
}
for_each_cpu(cpu, policy->cpus) {
@@ -793,11 +794,6 @@ struct cpufreq_governor *cpufreq_default_governor(void)
static int __init sugov_register(void)
{
- int cpu;
-
- for_each_possible_cpu(cpu)
- per_cpu(sugov_cpu, cpu).cpu = cpu;
-
return cpufreq_register_governor(&schedutil_gov);
}
fs_initcall(sugov_register);
--
2.13.1.449.g02a2850