From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756801AbZETKWf (ORCPT ); Wed, 20 May 2009 06:22:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755052AbZETKW2 (ORCPT ); Wed, 20 May 2009 06:22:28 -0400 Received: from web32603.mail.mud.yahoo.com ([68.142.207.230]:23187 "HELO web32603.mail.mud.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1753013AbZETKW1 (ORCPT ); Wed, 20 May 2009 06:22:27 -0400 Message-ID: <461911.6351.qm@web32603.mail.mud.yahoo.com> X-YMail-OSG: eU1JgoUVM1mcW.kig17beuLD.i_3bSuwS_INsB.1QBEFIRBOG9jJEoypZ0Rh7wkErmCFIruYZMEzunnp53Mrm_VWRkpkhhJzo41Nhs1JZGY2rOewHMbiopJrdu48PMu.0X.eAEfUimztkKBE_ZqRX5ntmtG12jKU.s4C2qYMAARvFXFNhtuRQxQE6F9EUe4ahjwR_RH20Ab6WA75pwG2yuB9q.GDzI1TLeFdEnYT0xusPek.XBvdXY4ZYKXy8RXcFo2kN0PieP5XHfq.YeisNx3v.znmAiJxeavJ7GWFdblM8NdFHWGdzvKTFMBvZBSQmKX5kJtD1q1HwbtztWwZnePB X-RocketYMMF: knobi.rm X-Mailer: YahooMailRC/1277.43 YahooMailWebService/0.7.289.10 References: <409142.83316.qm@web32605.mail.mud.yahoo.com> <20090428182837.62c51f26.akpm@linux-foundation.org> <1240977096.5478.3.camel@marge.simson.net> <20090429011755.c141c599.akpm@linux-foundation.org> <20090429120827.GI8633@ZenIV.linux.org.uk> <1241014725.15095.19.camel@marge.simson.net> <20090505154911.e0309a4f.akpm@linux-foundation.org> <1241585140.5196.28.camel@marge.simson.net> <957194.27869.qm@web32605.mail.mud.yahoo.com> <1241599065.18090.18.camel@marge.simson.net> Date: Wed, 20 May 2009 03:22:28 -0700 (PDT) From: Martin Knoblauch Subject: Re: Analyzed/Solved/Bisected: Booting 2.6.30-rc2-git7 very slow To: Mike Galbraith Cc: Andrew Morton , viro@ZenIV.linux.org.uk, rjw@sisk.pl, linux-kernel@vger.kernel.org, tigran@aivazian.fsnet.co.uks, Kay Sievers , "Rafael J. Wysocki" , shemminger@vyatta.com In-Reply-To: <1241599065.18090.18.camel@marge.simson.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org ----- Original Message ---- > From: Mike Galbraith > To: Martin Knoblauch > Cc: Andrew Morton ; viro@ZenIV.linux.org.uk; rjw@sisk.pl; linux-kernel@vger.kernel.org; tigran@aivazian.fsnet.co.uk > Sent: Wednesday, May 6, 2009 10:37:45 AM > Subject: Re: Analyzed/Solved: Booting 2.6.30-rc2-git7 very slow > > On Wed, 2009-05-06 at 00:55 -0700, Martin Knoblauch wrote: > > > just to bring this back to my problem :-) > > Good idea :-) > > > Last week I reported that the "new" sysfs entry in /proc/mounts already comes > out of initrd. Does this ring a bell? > > > > http://lkml.indiana.edu/hypermail/linux/kernel/0904.3/03048.html > > Nope, no bells. > > The only thing I can suggest is that you try a bisection. > > -Mike OK, so I finally managed to bisect the issue down to the following commit. Not much that I can say about it. Someone else suggested that it might all be a question of timing. Might very well be. I will try it out on a system with a different SCSI/RAID controller. The failing system has an "Smart Array 6i" (cciss). "cciss", "ext3" and "jbd" are all modules coming from initrd. |commit 1120f8b8169fb2cb51219d326892d963e762edb6 |Author: Stephen Hemminger |Date: Thu Dec 18 09:17:16 2008 -0800 | | PCI: handle long delays in VPD access | | Accessing the VPD area can take a long time. The existing | VPD access code fails consistently on my hardware. There are comments | | Change the access routines to: | * use a mutex rather than spinning with IRQ's disabled and lock held | * have a much longer timeout | * call cond_resched while spinning | | Signed-off-by: Stephen Hemminger | Reviewed-by: Matthew Wilcox | Signed-off-by: Jesse Barnes Cheers Martin