linux-kernel - Re: 2.6.19-rc4-mm1: noidlehz problems

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Message-ID: <20061101132052.GA2567@elf.ucw.cz>
Date:	Wed, 1 Nov 2006 14:20:52 +0100
From:	Pavel Machek <pavel@....cz>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	kernel list <linux-kernel@...r.kernel.org>, mingo@...hat.com,
	Andrew Morton <akpm@...l.org>
Subject: Re: 2.6.19-rc4-mm1: noidlehz problems

On Wed 2006-11-01 14:02:57, Arjan van de Ven wrote:
> On Wed, 2006-11-01 at 13:23 +0100, Pavel Machek wrote:
> > Hi!
> > 
> > First, it would be nice if we had someone listed as a maintainer of
> > noidlehz stuff...
> > 
> > Then... I'm getting strange messages from noidlehz each time I
> > unplug/replug AC power (perhaps due to interrupt latency?).
> 
> there probably is a different story going on.
> When you unplug/replug AC power, several bioses change the meaning of
> the software C-states in your system.
> (there is a mapping between software visible C states and the hardware
> C-states)

Yep, my notebook is one of such machines, so your theory looks very plausible.

									Pavel

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