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From: Manfred Gruber <m.gruber@tirol.com>
To: linux-kernel@vger.kernel.org
Cc: tglx@linutronix.de, Jan Altenberg <jan.altenberg@linutronix.de>,
	Ingo Molnar <mingo@elte.hu>
Subject: Re: preempt_rt bug or warn on arm v4t
Date: Wed, 25 Apr 2007 17:02:09 +0200	[thread overview]
Message-ID: <200704251702.09125.m.gruber@tirol.com> (raw)
In-Reply-To: <200704201526.40785.m.gruber@tirol.com>

Hi !

Gerrit Binnenmars pointed out that others have the same problem:
http://linux.omap.com/pipermail/linux-omap-open-source/2007-April/009535.html:
http://article.gmane.org/gmane.linux.distributions.gumstix.general/21376/match=gumstix+realtime+bug+sched+c

Jan Altenberg showed me that in include/asm-arm/system.h I should comment out 
this line:
#define __ARCH_WANT_INTERRUPTS_ON_CTXSW

Without this line, irqs are disabled on context switches. But this is only a 
change that the WARN dose not more occure. Is this now a hack or the 
sollution? Hopfully some RT hacker can look deeper, and find what is wrong.

thanks
regards manfred

Am Freitag, 20. April 2007 15:26 schrieben Sie:
> hi jan !
>
> Am Freitag, 20. April 2007 15:01 schrieben Sie:
> > > I am using 2.6.21-rc7 with Preempt_rt Patch 2.6.20-rc6-rt0 on ep93xx.
> >
> > Do you mean 2.6.21-rc6-rt0?
>
> sorry yes 2.6.21-rc6-rt0.
>
> > > This oops does not trigger in preempt_rt patch is applied.
> >
> > It does only appear, when the preempt_rt patch is applied. Did I get you
> > right?
>
> correct
>
> regards manfred
> -
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      reply	other threads:[~2007-04-25 15:01 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-04-20 11:06 preempt_rt bug or warn on arm v4t Manfred Gruber
2007-04-20 13:01 ` Jan Altenberg
2007-04-20 13:26   ` Manfred Gruber
2007-04-25 15:02     ` Manfred Gruber [this message]

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