From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755162Ab1BVTcl (ORCPT ); Tue, 22 Feb 2011 14:32:41 -0500 Received: from mail03do.versatel.de ([89.245.129.23]:33259 "EHLO mail03do.versatel.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751985Ab1BVTck (ORCPT ); Tue, 22 Feb 2011 14:32:40 -0500 Message-ID: <4D640F67.3040109@versanet.de> Date: Tue, 22 Feb 2011 20:32:55 +0100 From: "pantherchen@versanet.de" User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.14) Gecko/20110208 Thunderbird/3.1.8 MIME-Version: 1.0 To: Dmitry Torokhov CC: Tejun Heo , "linux-kernel@vger.kernel.org" Subject: Re: Boot time regression in 2.6.38 after initial wq merge References: <4D62CE9C.7090806@versanet.de> <20110222081752.GP31267@htj.dyndns.org> <20110222085223.GC11681@core.coreip.homeip.net> <20110222090255.GR31267@htj.dyndns.org> <4D63D062.3040404@versanet.de> <20110222172254.GA13114@core.coreip.homeip.net> <20110222175955.GA27991@core.coreip.homeip.net> In-Reply-To: <20110222175955.GA27991@core.coreip.homeip.net> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 02/22/2011 06:59 PM, Dmitry Torokhov wrote: > On Tue, Feb 22, 2011 at 09:22:54AM -0800, Dmitry Torokhov wrote: >> Just to confirm, if you revert commit >> >> 8ee294cd9def0004887da7f44b80563493b0a097 >> >> from 2.6.38-rc6, does this restore boot time? Yes, it's booting fine with that commit reverted. > And if that indeed fixes the issue I wonder if the reason for the stall > is that we trip on flush_scheduled_work() somewhere. If you could stick > dump_stack() into flush_scheduled_work() that might give us some clues. I wasn't sure where to put the dump_stack() call, so I placed one before and one after the flush_workqueue() call. Here's the part that turned up in dmesg: http://paste.ubuntu.com/570729/ Regards, Hernando Torque