linux-kernel - Re: [Announce] 2.6.29.1-rt4

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Date:	Tue, 7 Apr 2009 18:58:50 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Fernando Lopez-Lezcano <nando@...ma.Stanford.EDU>
cc:	LKML <linux-kernel@...r.kernel.org>,
	rt-users <linux-rt-users@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Carsten Emde <ce@...g.ch>,
	Clark Williams <williams@...hat.com>,
	Frank Rowand <frank.rowand@...sony.com>,
	Robin Gareus <robin@...eus.org>,
	Gregory Haskins <ghaskins@...ell.com>,
	Philippe Reynes <philippe.reynes@...smpp.fr>,
	Will Schmidt <will_schmidt@...t.ibm.com>
Subject: Re: [Announce] 2.6.29.1-rt4

Fernando,

On Tue, 7 Apr 2009, Fernando Lopez-Lezcano wrote:

> On Mon, 2009-04-06 at 21:54 +0200, Thomas Gleixner wrote:
> > Fernando,
> > 
> > On Sun, 5 Apr 2009, Fernando Lopez-Lezcano wrote:
> > > > Hmm. Can you upload your full patch queue and the binary rpm so I can
> > > > give it a test ride ?
> > > 
> > > Sure, no problem. I just did a release to planetcore-testing repo (with
> > > a warning to the planetccrma list), you can find it here:
> > > 
> > > http://ccrma.stanford.edu/planetccrma/mirror/fedora/linux/planetcore/testing/10/i386/repoview/index.html
> > > http://ccrma.stanford.edu/planetccrma/mirror/fedora/linux/planetcore/testing/10/x86_64/repoview/index.html
> > > 
> > > (the one I have tested and hangs is the i386 PAE version)
> > > Source here:
> > > 
> > > http://ccrma.stanford.edu/planetccrma/mirror/fedora/linux/planetcore/testing/10/SRPMS/
> > > 
> > > (if you don't want to figure out the .src.rpm - I would not blame you -
> > > I can give you a list of the patches that were actually applied - of the
> > > ones that are included in the package)
> > 
> > No problem. I know how to distangle those beasts.
> > 
> > Still I have no reproducer yet. One of my 32bit test machines survived
> > a 200 cycle test w/o showing it.
> 
> Arghh, I don't know what it could be then. You mean 200 power cycles??
> Wow... it only takes one here. Thanks for testing. 

Does it trigger when you just boot up and the immediately shut down
w/o doing any work on it ?

Could you try whether the following triggers the bug as well: Boot up,
do work or whatever. Make sure your data is sycned to disk. :)

# echo 0 >/sys/devices/system/cpu/cpu1/online

If that does not trigger, then check whether it survives the
shutdown/reboot. If it does we look further.
 
> > Is there anything special what you run, load ... ?
> 
> Not that I can think of right now. This happens on 32 bit installs on
> both Fedora 9 and Fedora 10. Nothing special installed, of course I have
> the Planet CCRMA packages but they don't involve additional kernel
> modules or anything that (I think) deals with startup or shutdown. 

Can you provide the list of modules loaded ?

Thanks,

	tglx
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