From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752399Ab0H2JEp (ORCPT ); Sun, 29 Aug 2010 05:04:45 -0400 Received: from hera.kernel.org ([140.211.167.34]:48419 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750760Ab0H2JEf (ORCPT ); Sun, 29 Aug 2010 05:04:35 -0400 Message-ID: <4C7A20F6.5070802@kernel.org> Date: Sun, 29 Aug 2010 10:57:26 +0200 From: Tejun Heo User-Agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.9.2.8) Gecko/20100802 Thunderbird/3.1.2 MIME-Version: 1.0 To: caiqian@redhat.com CC: torvalds@linux-foundation.org, linux-next@vger.kernel.org, kexec , linux-kernel Subject: Re: kdump regression compared to v2.6.35 References: <181596874.1477361283065264575.JavaMail.root@zmail06.collab.prod.int.phx2.redhat.com> In-Reply-To: <181596874.1477361283065264575.JavaMail.root@zmail06.collab.prod.int.phx2.redhat.com> X-Enigmail-Version: 1.1.1 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.3 (hera.kernel.org [127.0.0.1]); Sun, 29 Aug 2010 09:03:48 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/29/2010 09:01 AM, caiqian@redhat.com wrote: > Further bisect indicated this bad commit from the merge. Given kdump > kernel was running with maxcpus=1, I guess this work caused fs/bio.c > hung in the workqueue on UP. Reverted the whole merge let kdump work > again. Can you please pull from the following git tree and see whether it fixes the problem? There was a bug in nr_active accounting. git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git for-linus Thanks. -- tejun