Date: Mon, 15 Nov 2004 02:27:38 +0100
From: Florian Schmidt <mista.tapas@gmx.net>
To: Ingo Molnar <mingo@elte.hu>
Cc: linux-kernel@vger.kernel.org, Lee Revell <rlrevell@joe-job.com>,
       Rui Nuno Capela <rncbc@rncbc.org>, Mark_H_Johnson@Raytheon.com,
       "K.R. Foley" <kr@cybsft.com>, Bill Huey <bhuey@lnxw.com>,
       Adam Heath <doogie@debian.org>, Thomas Gleixner <tglx@linutronix.de>,
       Michal Schmidt <xschmi00@stud.feec.vutbr.cz>,
       Fernando Pablo Lopez-Lezcano <nando@ccrma.Stanford.EDU>,
       Karsten Wiese <annabellesgarden@yahoo.de>,
       Gunther Persoons <gunther_persoons@spymac.com>, emann@mrv.com,
       Shane Shrybman <shrybman@aei.ca>, Amit Shah <amit.shah@codito.com>
Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc1-mm3-V0.7.25-1
Message-ID: <20041115022738.56b9e9b6@mango.fruits.de>
In-Reply-To: <20041114141551.GA17043@elte.hu>
References: <20041025104023.GA1960@elte.hu>
	<20041027001542.GA29295@elte.hu>
	<20041103105840.GA3992@elte.hu>
	<20041106155720.GA14950@elte.hu>
	<20041108091619.GA9897@elte.hu>
	<20041108165718.GA7741@elte.hu>
	<20041109160544.GA28242@elte.hu>
	<20041111144414.GA8881@elte.hu>
	<20041111215122.GA5885@elte.hu>
	<20041114135656.7aa3b95b@mango.fruits.de>
	<20041114141551.GA17043@elte.hu>
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On Sun, 14 Nov 2004 15:15:51 +0100
Ingo Molnar <mingo@elte.hu> wrote:

> > i just build and booted into 26-3 (w/o debugging stuff) and put a
> > little load on the system (find /'s plus kernel compile plus
> > rtc_wakeup -f 8192). Got this on the console:
> > 
> > `IRQ 8` [14] is being piggy. need_resched=0, cpu=0
> > 
> > and the machine locked. will build with debugging and try to
> > reproduce.
> 
> hm, i tried and couldnt reproduce this, so i'm curious what your
> debugging build yields.

not mch sadly. I tried booting into it once more and had to wait quite a
while (around 30minutes) until the lock. I got this around 10 minutes before
the lock though:

Nov 15 00:09:23 mango kernel: bug in rtc_read(): called in state S_IDLE!

The system locked up quitly again. no console dump. sys rq kept working (i
could sync, remount ro and reboot). Does sys rq offer diagnosis which would
be useful for you?

flo
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