From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261543AbVGIP5d (ORCPT ); Sat, 9 Jul 2005 11:57:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261562AbVGIP5c (ORCPT ); Sat, 9 Jul 2005 11:57:32 -0400 Received: from mx1.elte.hu ([157.181.1.137]:29336 "EHLO mx1.elte.hu") by vger.kernel.org with ESMTP id S261543AbVGIP5c (ORCPT ); Sat, 9 Jul 2005 11:57:32 -0400 Date: Sat, 9 Jul 2005 17:57:04 +0200 From: Ingo Molnar To: Alistair John Strachan Cc: linux-kernel@vger.kernel.org Subject: Re: Realtime Preemption, 2.6.12, Beginners Guide? Message-ID: <20050709155704.GA14535@elte.hu> References: <200507061257.36738.s0348365@sms.ed.ac.uk> <200507082145.08877.s0348365@sms.ed.ac.uk> <20050709115817.GA4665@elte.hu> <200507091507.13215.s0348365@sms.ed.ac.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200507091507.13215.s0348365@sms.ed.ac.uk> User-Agent: Mutt/1.4.2.1i 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 * Alistair John Strachan wrote: > Okay, I'll send you the vmlinux from -18 with a new digital photo, and > config, with CONFIG_4KSTACKS enabled. this crash too seems to indicate trigger_softirqs()/wakeup_softirqd(). Somewhere we somehow corrupt the stack and e.g. in oops7.jpg we return to 00c011ed. Note that it's a right-shifted address that could be one of these: c011ed50 t wakeup_softirqd c011ed80 t trigger_softirqs but it looks pretty weird. DEBUG_STACK_POISON (and the full-debug .config i sent) could perhaps uncover other types of stack corruptions. Ingo