From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751957AbXBFJvA (ORCPT ); Tue, 6 Feb 2007 04:51:00 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751967AbXBFJvA (ORCPT ); Tue, 6 Feb 2007 04:51:00 -0500 Received: from outbound-fra.frontbridge.com ([62.209.45.174]:64296 "EHLO outbound4-fra-R.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751957AbXBFJu7 (ORCPT ); Tue, 6 Feb 2007 04:50:59 -0500 X-BigFish: VP X-Server-Uuid: 5FC0E2DF-CD44-48CD-883A-0ED95B391E89 Date: Tue, 6 Feb 2007 10:41:08 +0100 From: "Joerg Roedel" To: "Pekka Enberg" cc: logic@thinknet.ro, linux-kernel@vger.kernel.org Subject: Re: your mail Message-ID: <20070206094108.GC18017@amd.com> References: <1131.86.55.168.2.1170690089.squirrel@mail.thinknet.ro> <20070205123611.GI8804@amd.com> <84144f020702050601ve2e4746oebd774af9c487b63@mail.gmail.com> MIME-Version: 1.0 In-Reply-To: <84144f020702050601ve2e4746oebd774af9c487b63@mail.gmail.com> User-Agent: mutt-ng/devel-r804 (Linux) X-OriginalArrivalTime: 06 Feb 2007 09:41:12.0133 (UTC) FILETIME=[EFF83750:01C749D2] X-WSS-ID: 69D690A62MC7212473-10-01 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 05, 2007 at 04:01:23PM +0200, Pekka Enberg wrote: > Hi Joerg, > > On 2/5/07, Joerg Roedel wrote: > >Hmm, this seems to be the same issue as in [1] and [2]. A page that is > >assumed to belong to the slab but is not longer marked as a slab page. > >Could this be a bug in the memory management? > > The BUG_ON triggers whenever you feed an invalid pointer to kfree() or > kmem_cache_free() so I am guessing the caller is simply broken. Note > that kernels prior to 2.6.18 would quietly corrupt the slab unless > CONFIG_SLAB_DEBUG was enabled which might explain why this hasn't been > noticed before. Ok. I was not aware of that. Thanks for clarification. Joerg -- Joerg Roedel Operating System Research Center AMD Saxony LLC & Co. KG