Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755414AbYC1K0t (ORCPT ); Fri, 28 Mar 2008 06:26:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752831AbYC1K0m (ORCPT ); Fri, 28 Mar 2008 06:26:42 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:50388 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752955AbYC1K0l (ORCPT ); Fri, 28 Mar 2008 06:26:41 -0400 Date: Fri, 28 Mar 2008 11:25:35 +0100 From: Ingo Molnar To: Christian Kujau Cc: Thomas Gleixner , Andrew Morton , LKML , Markus Rehbach , "Rafael J. Wysocki" Subject: Re: 2.6.25-rc6: BUG: unable to handle kernel NULL pointer dereference Message-ID: <20080328102535.GD633@elte.hu> References: <20080325233357.17d6ac41.akpm@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 849 Lines: 24 * Christian Kujau wrote: > On Thu, 27 Mar 2008, Thomas Gleixner wrote: >> I had a lengthy bug decoding session with Ingo and we found the root >> cause: >> A dropped workaround for the prefetch bug in early X2s and >> Opterons. Patch below. > > Although I reported it, I could not repoduce the bug. Anyway, I've > applied your patch to -rc7 and no BUG so far :) yeah, the condition would normally be very sporadic and it can easily depend on a specific layout of your kernel image, etc. the (updated) fix is in Linus' latest git tree as well, and in x86.git/latest. 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/