Messages in this thread |  | | | Date | Mon, 10 Aug 2009 10:19:41 +0200 | | From | Pavel Machek <> | | Subject | Re: [PATCH 0/3] cpu: idle state framework for offline CPUs. |
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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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