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authorDirk Brandewie <dirk.j.brandewie@intel.com>2014-05-08 21:57:24 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-05-13 17:39:13 +0200
commitd40a63c45b506b0681918d7c62a15cc9d48c8681 (patch)
treeb0a0023a71d72947c0d691627010313580974683 /Documentation/block
parentintel_pstate: Set turbo VID for BayTrail (diff)
downloadlinux-d40a63c45b506b0681918d7c62a15cc9d48c8681.tar.xz
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intel_pstate: remove setting P state to MAX on init
Setting the P state of the core to max at init time is a hold over from early implementation of intel_pstate where intel_pstate disabled cpufreq and loaded VERY early in the boot sequence. This was to ensure that intel_pstate did not affect boot time. This in not needed now that intel_pstate is a cpufreq driver. Removing this covers the case where a CPU has gone through a manual CPU offline/online cycle and the P state is set to MAX on init and the CPU immediately goes idle. Due to HW coordination the P state request on the idle CPU will drag all cores to MAX P state until the load is reevaluated when to core goes non-idle. Reported-by: Patrick Marlier <patrick.marlier@gmail.com> Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com> Cc: 3.14+ <stable@vger.kernel.org> # 3.14+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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