From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Fri, 27 Feb 2015 21:36:54 +0100
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Message-ID: <20150227203654.GM434@hermes.click-hack.org>
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 <54F0D46F.1070006@siemens.com>
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Subject: Re: [Xenomai] xeno3_rc3 - Watchdog detected hard LOCKUP
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To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: xenomai@xenomai.org

On Fri, Feb 27, 2015 at 09:32:47PM +0100, Jan Kiszka wrote:
> On 2015-02-27 15:10, Niels Wellens wrote:
> > 
> >>
> >>>> Hi,
> >>>>
> >>>> Yesterday I installed a Core-i7 based pc (4770 CPU - C226 chipset) with
> >>>> software configuration:
> >>>> - Debian Jessie RC1
> >>>> - kernel 3.16.0-rc7 (.config in attachment)
> >>> Well, please try again with a kernel which is a real release and not
> >>> a release candidate, to rule out any mainline kernel issue.
> >>> -- 
> >>>                         Gilles.
> >>
> >> Thanks Gilles, sorry I overlooked the fact that I was using an rc. The
> >> system is now up and running with an ipipe patched 3.16.0 kernel, I
> >> will let you know if I experience the same issues with this kernel.
> >> -- 
> >> Niels
> > 
> > Hi,
> > 
> > I experience the same kind of lockup with the ipipe patched 3.16.0
> > kernel (used repo:
> > git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git).
> > I first thought the problem was solved but after more than 20 hours of
> > operation (latency test + dohell load) it occurred again. This afternoon
> > it occurred again after 1 hour of operation (syslog + config file used
> > during kernel build in attachement).
> > 
> > Any advice on what to test/change next?
> 
> Your machine gets stuck on a spinlock involved in page allocations, it
> seems. We need to find out who's holding it and why he's not releasing
> it anymore. I'll try to reproduce the issue with your config next week.

Maybe the nocow stuff?

-- 
					    Gilles.