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Groups > linux.kernel > #1677404
| From | Viresh Kumar <viresh.kumar@linaro.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH V2 3/4] intel_pstate: Ignore scheduler cpufreq callbacks on remote CPUs |
| Date | 2017-06-29 07:30 +0200 |
| Message-ID | <tXAbF-3uh-33@gated-at.bofh.it> (permalink) |
| References | <tXAbE-3uh-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Steve Muckle <smuckle.linux@gmail.com>
In preparation for the scheduler cpufreq callback happening on remote
CPUs, check for this case in intel_pstate which currently requires the
callback run on the local CPU. Such callbacks are ignored for now.
Signed-off-by: Steve Muckle <smuckle.linux@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/cpufreq/intel_pstate.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 4ce501148790..7a2a8ee579ef 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -1755,6 +1755,9 @@ static void intel_pstate_update_util(struct update_util_data *data, u64 time,
struct cpudata *cpu = container_of(data, struct cpudata, update_util);
u64 delta_ns;
+ if (smp_processor_id() != data->cpu)
+ return;
+
if (flags & SCHED_CPUFREQ_IOWAIT) {
cpu->iowait_boost = int_tofp(1);
} else if (cpu->iowait_boost) {
--
2.13.0.71.gd7076ec9c9cb
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[PATCH V2 0/4] sched: cpufreq: Allow remote callbacks Viresh Kumar <viresh.kumar@linaro.org> - 2017-06-29 07:30 +0200
[PATCH V2 3/4] intel_pstate: Ignore scheduler cpufreq callbacks on remote CPUs Viresh Kumar <viresh.kumar@linaro.org> - 2017-06-29 07:30 +0200
Re: [PATCH V2 3/4] intel_pstate: Ignore scheduler cpufreq callbacks on remote CPUs Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2017-06-29 23:30 +0200
Re: [PATCH V2 3/4] intel_pstate: Ignore scheduler cpufreq callbacks on remote CPUs Viresh Kumar <viresh.kumar@linaro.org> - 2017-06-30 05:30 +0200
Re: [PATCH V2 0/4] sched: cpufreq: Allow remote callbacks "Rafael J. Wysocki" <rafael@kernel.org> - 2017-06-29 22:40 +0200
Re: [PATCH V2 0/4] sched: cpufreq: Allow remote callbacks Viresh Kumar <viresh.kumar@linaro.org> - 2017-06-30 05:30 +0200
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