From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: Re: sleepy linux self-test Date: Wed, 30 Jan 2008 17:39:09 +0100 Message-ID: <20080130163909.GA5395@elf.ucw.cz> References: <20080130131748.GA3796@elf.ucw.cz> <20080130163511.GA30797@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20080130163511.GA30797@elte.hu> Sender: linux-kernel-owner@vger.kernel.org To: Ingo Molnar Cc: kernel list , Linux-pm mailing list List-Id: linux-pm@vger.kernel.org On Wed 2008-01-30 17:35:11, Ingo Molnar wrote: > > * Pavel Machek 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