Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262356AbUKZT37 (ORCPT ); Fri, 26 Nov 2004 14:29:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262347AbUKZTVg (ORCPT ); Fri, 26 Nov 2004 14:21:36 -0500 Received: from zeus.kernel.org ([204.152.189.113]:62401 "EHLO zeus.kernel.org") by vger.kernel.org with ESMTP id S262219AbUKZTTz (ORCPT ); Fri, 26 Nov 2004 14:19:55 -0500 Date: Thu, 25 Nov 2004 12:13:44 +0100 From: Ingo Molnar To: Rui Nuno Capela Cc: linux-kernel@vger.kernel.org, Lee Revell , mark_h_johnson@raytheon.com, "K.R. Foley" , Bill Huey , Adam Heath , Florian Schmidt , Thomas Gleixner , Michal Schmidt , Fernando Pablo Lopez-Lezcano , Karsten Wiese , Gunther Persoons , emann@mrv.com, Shane Shrybman , Amit Shah , Esben Nielsen Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.31-0 Message-ID: <20041125111344.GA17786@elte.hu> References: <20041116130946.GA11053@elte.hu> <20041116134027.GA13360@elte.hu> <20041117124234.GA25956@elte.hu> <20041118123521.GA29091@elte.hu> <20041118164612.GA17040@elte.hu> <20041122005411.GA19363@elte.hu> <20041123175823.GA8803@elte.hu> <20041124101626.GA31788@elte.hu> <20041124112745.GA3294@elte.hu> <21889.195.245.190.93.1101377024.squirrel@195.245.190.93> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <21889.195.245.190.93.1101377024.squirrel@195.245.190.93> User-Agent: Mutt/1.4.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1582 Lines: 43 * Rui Nuno Capela wrote: > last thing, at the moment, that "reliably" locks up the machine is > accessing the floppy-disk (dev/fd0). Yes, I still have one here, and > it was just yesterday that I've tried to mount on it and bang! > power-off and a cold-boot follows. Reproducibility? ALWAYS is often > enough. Nothing shows up via serial console. will take a look. > [...] Jackd XRUN rates are pretty low and on the same level (e.g. less > than 5 per hour with the default jack_test3.1 test), [...] could you post the jack_test summary outputs? > Oh well. But let's get back to reality :) How can I help on fixing > this floppy showstopper? I've tried with almost every debug option set > and nothing is dumped either on syslog or serial console. The only > visible thing is that, once the floppy starts spinning (LED is on) the > machine freezes. Weird. how hard of a freeze is it? I.e. if you log in over the text console, and do: chrt -f 99 -p `pidof 'IRQ 1'` chrt -f 99 -p $$ can you access the sysrq keys after the freeze happens? If not, can you access them if you do: echo 1 > /proc/sys/kernel/debug_direct_keyboard ? And finally, if the above experiments suggest that it's a hard lockup, do you have a working NMI watchdog? (i.e. do the NMI counts in /proc/interrupt increase on all CPUs?) Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/