Re: [PATCH] x86 intel power: Initialize MSR_IA32_ENERGY_PERF_BIAS

[Pavel Machek]

> > > However, the typical BIOS fails to initialize the MSR,
> > > and the typical Linux distro neglects to invoke x86_energy_perf_policy(8).
> > > 
> > > The result is that some modern hardware is running in hardware default,
> > > which is "performance" mode, rather than the intended design default
> > > of "normal" mode.
> > > 
> > > Initialize the MSR to the "normal" setting during kernel boot.
> > > 
> > > Of course, x86_energy_perf_policy(8) is available to change
> > > the default after boot, should the user have a policy preference.
> > > 
> > > cc: stable@xxxxxxxxxx
...
> Will it be possible to measure a performance difference between
> "performance" and "normal"?  Yes, it will be possible.

Ok. So... what "serious bug" does this fix? You really need to use cc:
stable less. Tweaking performance/power ratio is _not_ serious bug.


									Pavel
-- 
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