Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262894AbUKRTIO (ORCPT ); Thu, 18 Nov 2004 14:08:14 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262886AbUKRTG6 (ORCPT ); Thu, 18 Nov 2004 14:06:58 -0500 Received: from mx2.elte.hu ([157.181.151.9]:60810 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S262896AbUKRTEO (ORCPT ); Thu, 18 Nov 2004 14:04:14 -0500 Date: Thu, 18 Nov 2004 21:06:03 +0100 From: Ingo Molnar To: Christian Meder Cc: linux-kernel@vger.kernel.org, Lee Revell , Rui Nuno Capela , 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 Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm1-V0.7.28-1 Message-ID: <20041118200603.GC25938@elte.hu> References: <20041108165718.GA7741@elte.hu> <20041109160544.GA28242@elte.hu> <20041111144414.GA8881@elte.hu> <20041111215122.GA5885@elte.hu> <20041116125402.GA9258@elte.hu> <20041116130946.GA11053@elte.hu> <20041116134027.GA13360@elte.hu> <20041117124234.GA25956@elte.hu> <20041118123521.GA29091@elte.hu> <1100791410.3397.15.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1100791410.3397.15.camel@localhost> 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: 1591 Lines: 35 * Christian Meder wrote: > I've got one of those 'my box just locked up'. I can reproduce it with > 0.7.25-1, 0.7.28-0 and 0.7.28-1 by starting the Jetty servlet > container with our inhouse java project under a Blackdown 1.4 jdk. > Within a minute the laptop just locks up: no mouse, no ping, console > switching sysrq-t or anything. The peculiar thing is that I was > running 0.7.25-1 for two or three days before and it was rocksolid. It > was just when I started to work with the jvm that things fell apart. > > Any chance to get any interesting and helpful data in this setup ? best would be to have a reproducer. Can you trigger it over the network, using a remote session? If yes then you might want to try this: let the box boot in, switch it to a text console and dont touch the keyboard after that. Do this over the remote session: echo 1 > /proc/sys/kernel/debug_direct_keyboard this activates a direct interrupt line for the keyboard only. Keep the box on the text-console, and try to reproduce the hang over the network. Once it triggers, try SysRq - does it work? (leds wont work, but normal keys should work.) if the keyboard still doesnt work then you could try nmi_watchdog=1 or nmi_watchdog=2 (the latter on IO-APIC-less systems), and serial logging, to capture a dump of the hard-lockup. 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/