From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: kdump regression compared to v2.6.35 Date: Sun, 29 Aug 2010 10:57:26 +0200 Message-ID: <4C7A20F6.5070802@kernel.org> References: <181596874.1477361283065264575.JavaMail.root@zmail06.collab.prod.int.phx2.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <181596874.1477361283065264575.JavaMail.root-k5qu2F3t005+R5eDjrG6zsCp5Q1pQRjfhaY/URYTgi6ny3qCrzbmXA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kexec-bounces-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org Errors-To: kexec-bounces+glkk-kexec=m.gmane.org-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org To: caiqian-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org Cc: kexec , linux-next-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org, linux-kernel List-Id: linux-next.vger.kernel.org On 08/29/2010 09:01 AM, caiqian-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org 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