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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-10-19 02:57:22 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-10-21 22:18:22 +0200
commita6c6ead14183ea4ec8ce7551e1f3451024b9c4db (patch)
tree4d83d3c8a987c477ecae017915c7aee58afceafc /Documentation/DocBook
parentc6fe46a79ecd79606bb96fada4515f6b23f87b62 (diff)
cpufreq: intel_pstate: Set P-state upfront in performance mode
After commit a4675fbc4a7a (cpufreq: intel_pstate: Replace timers with utilization update callbacks) the cpufreq governor callbacks may not be invoked on NOHZ_FULL CPUs and, in particular, switching to the "performance" policy via sysfs may not have any effect on them. That is a problem, because it usually is desirable to squeeze the last bit of performance out of those CPUs, so work around it by setting the maximum P-state (within the limits) in intel_pstate_set_policy() upfront when the policy is CPUFREQ_POLICY_PERFORMANCE. Fixes: a4675fbc4a7a (cpufreq: intel_pstate: Replace timers with utilization update callbacks) Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
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