Re: [PATCH] cpufreq: Align all CPUs to the same frequency if usingshared clock

From: Viresh Kumar
Date: Wed Jan 22 2014 - 01:43:14 EST

On 22 January 2014 11:56, Li, Zhuangzhi <> wrote:
> I don't think it's a real bug in bootloader, the bootloader can set CPUs to different frequencies according to actually requirements(Power saving first or Performance first),
> the CPUs freq policy are initialized in kernel, if the kernel want to share one CPU policy(using CPUFREQ_SHARED_TYPE_ALL type), it should ensure all CPUs frequencies aligned first,
> don't depend on the bootloader CPUs Pre-states, then the kernel can have better compatibility.
> If the kernel uses CPUFREQ_SHARED_TYPE_ALL policy, the patch can ensure these:
> 1. If all CPUs are in the same P-state, it does nothing when cpufreq registering
> 2. If the CPUs are in different P-states, all the other CPUs are aligned once to current frequency of CPU0 according to the present policy.

I thought, as you are asking kernel to keep same freq on all of them,
then same should be true for bootloaders.

Otherwise it was okay.
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