lkml.org 
[lkml]   [2011]   [Apr]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] x86 intel power: Initialize MSR_IA32_ENERGY_PERF_BIAS

> > > 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@kernel.org
...
> 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
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


\
 
 \ /
  Last update: 2011-04-20 15:17    [W:1.674 / U:0.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site