From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756543AbXFAWUj (ORCPT ); Fri, 1 Jun 2007 18:20:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754383AbXFAWUL (ORCPT ); Fri, 1 Jun 2007 18:20:11 -0400 Received: from netops-testserver-4-out.sgi.com ([192.48.171.29]:39226 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754026AbXFAWUK (ORCPT ); Fri, 1 Jun 2007 18:20:10 -0400 Date: Fri, 1 Jun 2007 15:20:05 -0700 (PDT) From: Christoph Lameter X-X-Sender: clameter@schroedinger.engr.sgi.com To: Andrew Morton cc: Jeremy Fitzhardinge , Srinivasa Ds , linux-kernel@vger.kernel.org, Linus Torvalds , Srivatsa Vaddagiri , Dinakar Guniguntala , pj@sgi.com, simon.derr@bull.net, clameter@cthulhu.engr.sgi.com, rientjes@google.com Subject: Re: [RFC] [PATCH] cpuset operations causes Badness at mm/slab.c:777 warning In-Reply-To: <20070601151649.bb23c6f9.akpm@linux-foundation.org> Message-ID: References: <465FCA79.70207@in.ibm.com> <200706011620.05756.srinivasa@in.ibm.com> <466081DE.70205@goop.org> <20070601135900.ec44b1aa.akpm@linux-foundation.org> <20070601151649.bb23c6f9.akpm@linux-foundation.org> 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 On Fri, 1 Jun 2007, Andrew Morton wrote: > If slab was smart enough, it would have poisoned those 8 bytes to some > known pattern, and then checked that they still had that pattern when the > memory got freed again. So this is new feature request? > But it isn't smart enough, so the bug went undetected. I should make SLUB put poisoning values in unused areas of a kmalloced object?