Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263258AbTEVUh7 (ORCPT ); Thu, 22 May 2003 16:37:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263268AbTEVUh7 (ORCPT ); Thu, 22 May 2003 16:37:59 -0400 Received: from holomorphy.com ([66.224.33.161]:45198 "EHLO holomorphy") by vger.kernel.org with ESMTP id S263258AbTEVUh6 (ORCPT ); Thu, 22 May 2003 16:37:58 -0400 Date: Thu, 22 May 2003 13:50:51 -0700 From: William Lee Irwin III To: jjs Cc: Andrew Morton , linux kernel Subject: Re: 2.5.69-mm8 improvements and one oops Message-ID: <20030522205051.GX8978@holomorphy.com> Mail-Followup-To: William Lee Irwin III , jjs , Andrew Morton , linux kernel References: <3ECD13A1.9060103@tmsusa.com> <20030522130731.10f34d58.akpm@digeo.com> <3ECD35E2.10109@tmsusa.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3ECD35E2.10109@tmsusa.com> Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1067 Lines: 32 Andrew Morton wrote >> You hit the free-of-a-freed-task_struct bug. >> This bug has been hanging around for ages. It is very rare and nobody >> knows what causes it. On Thu, May 22, 2003 at 01:41:06PM -0700, jjs wrote: > I'm lucky I suppose - The cause for this is less than obvious. Andrew Morton wrote >> Are you running preempt? SMP? Is it repeatable? On Thu, May 22, 2003 at 01:41:06PM -0700, jjs wrote: > It's preempt, defintely, always - > But just a UP kernel on a lowly UP box - > As for repeatability, I'll see if I can induce > the oops again but there's no telling... Preempt is a common theme in the reports I've seen on this. It appears SMP allows the offender to clean up after the bug, but relatively long times between racy things rescheduling on preempt triggers the issue more readily. -- wli - 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/