From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965402AbXCVBct (ORCPT ); Wed, 21 Mar 2007 21:32:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965447AbXCVBct (ORCPT ); Wed, 21 Mar 2007 21:32:49 -0400 Received: from smtp-out2.blueyonder.co.uk ([195.188.213.5]:34043 "EHLO smtp-out2.blueyonder.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965402AbXCVBcs (ORCPT ); Wed, 21 Mar 2007 21:32:48 -0400 Message-ID: <4601DCB4.4060804@blueyonder.co.uk> Date: Thu, 22 Mar 2007 01:32:36 +0000 From: Sid Boyce Reply-To: g3vbv@blueyonder.co.uk Organization: blueyonder.co.uk User-Agent: Thunderbird 1.5.0.10 (X11/20070221) MIME-Version: 1.0 To: "Eric W. Biederman" CC: Adrian Bunk , linux-kernel@vger.kernel.org, auxsvr@gmail.com Subject: Re: 2.6.21-rc1 and 2.6.21-rc2 kwin dies silently References: <45E59D64.3070202@blueyonder.co.uk> <200702281805.13822.auxsvr@gmail.com> <20070307214730.87859590.akpm@linux-foundation.org> <45EFBC73.2030005@blueyonder.co.uk> <46016EAF.6010801@blueyonder.co.uk> <20070321193420.GP752@stusta.de> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Eric W. Biederman wrote: > Adrian Bunk writes: > > >> On Wed, Mar 21, 2007 at 05:43:11PM +0000, Sid Boyce wrote: >> >>> Sid Boyce wrote: >>> >>>> Andrew Morton wrote: >>>> >>>>> (cc restored. Please always do reply-to-all) >>>>> >>>>> >>>>> >>>>>> On Wed, 28 Feb 2007 18:05:13 +0200 auxsvr@gmail.com wrote: >>>>>> On Wednesday 28 February 2007 17:19, Sid Boyce wrote: >>>>>> >>>>>> >>>>>>> openSUSE 10.3 Alpha and KDE-3.5.6, xorg-x11-7.2. KDE is setup not to >>>>>>> require a password to unlock, but it asks for password. When the screen >>>>>>> unlocks, kwin is gone with no errors logged in /var/log/kdm or >>>>>>> /var/log/messages. No problems with 2.6.20. >>>>>>> >>>>>>> Same problem on openSUSE 10.2 x86_64, KDE-3.5.5 and 2.6.21-rc2. >>>>>>> Regards >>>>>>> Sid. >>>>>>> >>>>>>> >>>>>> This is the linux kernel mailing list. Perhaps you should post your >>>>>> problem to the opensuse mailing list. >>>>>> >>>>>> >>>>> 2.6.20 worked. >>>>> >>>>> 2.6.20-rc2 did not. >>>>> >>>>> Working theory: the kernel broke. >>>>> >>>>> Sid, the chances that anyone can work out what caused this are pretty >>>>> low. It would be great if you could perform a git bisection search >>>>> sometime in >>>>> the next few weeks, work out which commit caused this. >>>>> >>>>> Thanks. >>>>> >>>>> >>>>> >>>>> >>>>> >>>> I shall go back to 2.6.20-git3 and work forward. Up to 2.6.20-git2 was OK. >>>> Regards >>>> Sid. >>>> >>>> >>> I tracked the problem down to 2.6.20-git11. Up to 2.6.20-git10 is OK, >>> but from 2.6.20-git11 up to current 2.6.21-rc4-git2 all exhibit the problem. >>> >> Thanks for this search. >> >> Looking at the changes between 2.6.20-git10 and 2.6.20-git11, the only >> suspicious changes are the 60 sysctl patches by Eric. >> >> Eric, can you look at this issue? >> > > git bisect between git10 (ac98695d6c1508b724f246f38ce57fb4e3cec356) > and git11 (86a71dbd3e81e8870d0f0e56b87875f57e58222b) is likely the most > productive thing that can be done right now. > > I can't think of anything in my sysctl patches that would kill an > application. My sysctl work is right on the border with user space > so it is a good candidate but at the same time there should have > been no user visible changes. There were a few places where > I removed sys_sysctl support (but not /proc/sys support) but I don't > think any of those were on x86, and they were is such a messed up > state I don't think anyone could have reasonably used them anyway. > > So I think either we poke blindly making random guess by hand or > we let git-bisect do it. > > Sid do you think you can figure out git-bisect? > git-bisect start > git-bisect bad 86a71dbd3e81e8870d0f0e56b87875f57e58222b > git-bisect good ac98695d6c1508b724f246f38ce57fb4e3cec356 > > It should narrow the problem down to a single commit in 6-8 tries > after which point we should have enough information to start > making intelligent guesses. > > Eric > > > Reading the manpage doesn't help, so I shall have to delve into the docs or futher help is needed. :/usr/src/linux-2.6.20-git11 # git-bisect good ac98695d6c1508b724f246f38ce57fb4e3cec356 No revs to be shown. :/usr/src/linux-2.6.20-git11 # ls .git/refs/bisect/ bad good-ac98695d6c1508b724f246f38ce57fb4e3cec356 :/usr/src/linux-2.6.20-git11 # less .git/refs/bisect/good-ac98695d6c1508b724f246f38ce57fb4e3cec356 ac98695d6c1508b724f246f38ce57fb4e3cec356 :/usr/src/linux-2.6.20-git11 # less .git/refs/bisect/bad 86a71dbd3e81e8870d0f0e56b87875f57e58222b Regards Sid. -- Sid Boyce ... 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