tree 4d83d3c8a987c477ecae017915c7aee58afceafc
parent c6fe46a79ecd79606bb96fada4515f6b23f87b62
author Rafael J. Wysocki <rafael.j.wysocki@intel.com> 1476838642 +0200
committer Rafael J. Wysocki <rafael.j.wysocki@intel.com> 1477081102 +0200

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>