On Sun 2009-08-09 15:22:02, Rafael J. Wysocki wrote:
> On Sunday 09 August 2009, Pavel Machek wrote:
> > Hi!
> >
> > > > Also, approaches such as [1] can make use of this
> > > > extended infrastructure instead of putting the CPU to an arbitrary
> > > > C-state
> > > > when it is offlined, thereby providing the system administrator a rope
> > > > to hang
> > > > himself with should he feel the need to do so.
> > > I didn't see the reason why administrator needs to know which state
> > > offline cpu
> > > should stay. Don't know about powerpc side, but in x86 side, it appears
> > > deepest
> > > C-state is already preferred.
> > >
> >
> > Agreed, deepest c-state is always best, there's no need to make it
> > configurable.
>
> Unless it doesn't work.
If it does not work, machine will not boot. We already have
max_cstate= kernel command line option to work around that...
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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