linux-kernel - Re: cpu hotplug support broken in 2.6.23-rc3

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Message-ID: <20070903035854.GD3655@ucw.cz>
Date:	Mon, 3 Sep 2007 03:58:54 +0000
From:	Pavel Machek <pavel@....cz>
To:	Gautham R Shenoy <ego@...ibm.com>
Cc:	rusty@...tycorp.com.au, vatsa@...ibm.com, zwane@....linux.org.uk,
	kernel list <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: cpu hotplug support broken in 2.6.23-rc3

On Wed 2007-08-29 13:38:27, Gautham R Shenoy wrote:
> Hi Pavel,
> On Mon, Aug 27, 2007 at 12:43:50PM +0200, Pavel Machek wrote:
> > Hi!
> > 
> > Trying to do few onlines/offlines reliably hangs my machine (thinkpad
> > x60, i386 architecture).
> > 
> 
> That's strange. 
> 
> I've been running cpu offline/online tests with kern bench, 
> cpufreq-ondemand and a few rt-tasks running in the background
> and it has worked for me. 
> Something like 100 iterations without a problem. But these were on
> machines with 4-8 cpus.  So may be this could be something specific to
> the dual cpu machine.

Seems like it is specific to nohz/highrestimers. 

> Can you post the .config? I'll try to recreate it?

Will send privately.

> > Plus I guess it would be nice to add CPU HOTPLUG into MAINTAINERS
> > file:
> > 
> 
> There is a list of maintainers in the Documentation/cpu-hotplug.txt, 
> which includes maintainers for different platforms as well.
> 
> It's a good idea to add that info to the MAINTAINERS file as well.

Yes, please.

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