linux-kernel - Re: sleepy linux self-test

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Message-ID: <20080130163909.GA5395@elf.ucw.cz>
Date:	Wed, 30 Jan 2008 17:39:09 +0100
From:	Pavel Machek <pavel@....cz>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	kernel list <linux-kernel@...r.kernel.org>,
	Linux-pm mailing list <linux-pm@...ts.osdl.org>
Subject: Re: sleepy linux self-test

On Wed 2008-01-30 17:35:11, Ingo Molnar wrote:
> 
> * Pavel Machek <pavel@....cz> wrote:
> 
> > Hi!
> > 
> > This version should work, at least it did not fail in my testing. It 
> > does one test 5 second after bootup, then periodically once per 500 
> > seconds. Different parameters are trivial to tweak.
> 
> nice - is nohz=off still needed? (if not, what was the problem with 
> nohz?)

Not needed, but I do not know where the nohz problem was. Waiting 5
seconds means userspace comes up and problem is somehow worked around.

The nohz problem was of the "you need to press keys to get forward
progress" -- the kind I tried to debug few times already :-(.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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