Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262622AbTKLQ1y (ORCPT ); Wed, 12 Nov 2003 11:27:54 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262674AbTKLQ1y (ORCPT ); Wed, 12 Nov 2003 11:27:54 -0500 Received: from fw.osdl.org ([65.172.181.6]:15266 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S262622AbTKLQ1x (ORCPT ); Wed, 12 Nov 2003 11:27:53 -0500 Date: Wed, 12 Nov 2003 08:27:16 -0800 (PST) From: Linus Torvalds To: Maciej Zenczykowski cc: Solar Designer , Linux Kernel Mailing List Subject: Re: 2.4.23-pre9 ide+XFree+ptrace=Complete hang In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1134 Lines: 25 On Wed, 12 Nov 2003, Maciej Zenczykowski wrote: > > Well I got a hold of the necessary cabling and I'm sorry to report that > there is absolutely nothing on the serial console - I get the boot > messages, etc. fine, the last message before crashing is 'Loglevel set to > 9' [invoked by hand via Alt+SysRq+9], after which I crash it with 'strace > ls -lR /' (as a normal user) and nothing else shows up, no oops no nada. Ok. The nice thing about getting a serial console is that now you could try the NMI watchdog - just boot up with "nmi_watchdog=1" on the kernel command line (or "=2" - see Documentation/nmi_watchdog.txt for more information on it). That won't necessarily see the problem either, especially if it's a total hardware lockup brought on by X poking registers in unfortunate ways, but if it's a pure kernel lockup with interrupts disabled, it can help. Linus - 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/