From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756793Ab2CFQZE (ORCPT ); Tue, 6 Mar 2012 11:25:04 -0500 Received: from mx1.redhat.com ([209.132.183.28]:37405 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756645Ab2CFQZA (ORCPT ); Tue, 6 Mar 2012 11:25:00 -0500 Date: Tue, 6 Mar 2012 11:24:55 -0500 From: Vivek Goyal To: Tejun Heo Cc: axboe@kernel.dk, ctalbott@google.com, rni@google.com, linux-kernel@vger.kernel.org Subject: Re: [PATCHSET] blkcg: accumulated blkcg updates Message-ID: <20120306162455.GB32148@redhat.com> References: <1329875223-5102-1-git-send-email-tj@kernel.org> <20120305210726.GC1263@google.com> <20120305210836.GD1263@google.com> <20120306150709.GA32148@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20120306150709.GA32148@redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 06, 2012 at 10:07:09AM -0500, Vivek Goyal wrote: [..] > > My system is hanging during reboot. Last message I see is "Detaching DM > devices" and nothing happens after that. I shall have to do some more > testing to figure out when did that start happening. Ok, git bisect shows that very first patch to drain the queue is culprit. 9e5b9f8 block: blk-throttle should be drained regardless of q->elevator Will do some more debugging. Thanks Vivek