Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261167AbUK0H0v (ORCPT ); Sat, 27 Nov 2004 02:26:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261190AbUK0G7y (ORCPT ); Sat, 27 Nov 2004 01:59:54 -0500 Received: from zeus.kernel.org ([204.152.189.113]:32190 "EHLO zeus.kernel.org") by vger.kernel.org with ESMTP id S261304AbUKZTHR (ORCPT ); Fri, 26 Nov 2004 14:07:17 -0500 Date: Thu, 25 Nov 2004 12:44:58 +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: <20041125114458.GA20831@elte.hu> References: <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> <20041125111344.GA17786@elte.hu> <4798.195.245.190.93.1101379116.squirrel@195.245.190.93> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4798.195.245.190.93.1101379116.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: 951 Lines: 26 * Rui Nuno Capela wrote: > > 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? > > The lockup is pretty hard indeed. Complete lockup. No sysrq, not even > any output thru serial console. The only action that has some visible > effect is turning the power/reset switch off :) note that unless you try the above, or the debug_direct_keyboard switch, 'soft' lockups will have the same symptoms: no sysrq, no serial console, an apparently hung system. So unless you've done the equivalent already, please try my suggestions. 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/