From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755597AbYGVNCZ (ORCPT ); Tue, 22 Jul 2008 09:02:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751444AbYGVNCN (ORCPT ); Tue, 22 Jul 2008 09:02:13 -0400 Received: from mtiwmhc11.worldnet.att.net ([204.127.131.115]:50792 "EHLO mtiwmhc11.worldnet.att.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751027AbYGVNCM (ORCPT ); Tue, 22 Jul 2008 09:02:12 -0400 Message-ID: <4885DA49.50703@lwfinger.net> Date: Tue, 22 Jul 2008 08:02:01 -0500 From: Larry Finger User-Agent: Thunderbird 2.0.0.12 (X11/20071114) MIME-Version: 1.0 To: David Miller CC: kaber@trash.net, mingo@elte.hu, ischram@telenet.be, torvalds@linux-foundation.org, akpm@linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, j@w1.fi Subject: Re: [crash] BUG: unable to handle kernel NULL pointer dereference at 0000000000000370 References: <4885104A.2070201@lwfinger.net> <20080721.161517.27161039.davem@davemloft.net> <48857F74.2040406@lwfinger.net> <20080722.043220.247312412.davem@davemloft.net> In-Reply-To: <20080722.043220.247312412.davem@davemloft.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org David Miller wrote: > From: Larry Finger > Date: Tue, 22 Jul 2008 01:34:28 -0500 > >> David Miller wrote: >>> From: Larry Finger >>> Date: Mon, 21 Jul 2008 17:40:10 -0500 >>> >>>> Sorry :( >>>> >>>> I used the davem patch, the second version of your first one, and your second >>>> one. Both problems persist. >>>> >>>> Still plugging away on bisection. >>> GIT bisecting the lockdep problem is surely going the land you on: >>> >>> commit e308a5d806c852f56590ffdd3834d0df0cbed8d7 >> No. It landed on this one. > > For the lockdep warnings? When I was just one commit later, I got both the lockdep warning and the BUG. This is the commit in question. commit 16361127ebed0fb8f9d7cc94c6e137eaf710f676 Author: David S. Miller Date: Wed Jul 16 02:23:17 2008 -0700 pkt_sched: dev_init_scheduler() does not need to lock qdisc tree. We are registering the device, there is no way anyone can get at this object's qdiscs yet in any meaningful way. Signed-off-by: David S. Miller Larry