Re: System deadlock on 2.6.24-rt20 (-rt27 panics on locking-api-selftests)

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On Fri, 3 Apr 2009, Remy Bohmer wrote:

> Hello Thomas,
> 
> 2009/4/3 Remy Bohmer <linux@xxxxxxxxxx>:
> > Hello Thomas,
> >
> >>> Does anybody recognise these backtraces? And if so, is there a fix for
> >>> it already?
> >>
> >> http://www.kernel.org/pub/linux/kernel/projects/rt/patch-2.6.24.7-rt27.bz2
> 
> I integrated -rt27, but this one fails on the locking api-selftests.
> Is this a bug in the selftest? Or is there a real locking bug behind
> it?

Don't think so. The rw locks fixups which we did between -rt20 and
-rt27 might have screwed the lockdep selftests where we create
deadlock situations. What happens if you disable the self tests ?

Thanks,

	tglx
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