From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751321AbZIVT4Z (ORCPT ); Tue, 22 Sep 2009 15:56:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751102AbZIVT4Z (ORCPT ); Tue, 22 Sep 2009 15:56:25 -0400 Received: from mail.atlantis.sk ([80.94.52.35]:45681 "EHLO mail.atlantis.sk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751076AbZIVT4Y (ORCPT ); Tue, 22 Sep 2009 15:56:24 -0400 From: Ondrej Zary To: Frans Pop Subject: Re: Hibernation oops with 2.6.31 won't fit the screen - bisected Date: Tue, 22 Sep 2009 21:56:19 +0200 User-Agent: KMail/1.9.10 Cc: linux-kernel@vger.kernel.org, magnus.damm@gmail.com, tglx@linutronix.de References: <200909192155.01225.linux@rainbow-software.org> <200909192344.55258.elendil@planet.nl> In-Reply-To: <200909192344.55258.elendil@planet.nl> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200909222156.21871.linux@rainbow-software.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Saturday 19 September 2009 23:44:54 Frans Pop wrote: > Ondrej Zary wrote: > > hibernation worked great with 2.6.30 - I had over a month of uptime (it > > never worked so well before - always crashed after some time). But in > > 2.6.31, it's broken again - and completely. The first hibernation works > > but it always crashes on the second one. > > > > The problem is that the oops is so long that it does not fit the screen - > > even 1280x1024 is not enough. Scrolling does not work (as it used to do > > on 2.4 kernels), netconsole does not catch it. So how can I debug this? > > One way to get at least an indication of what broke the hibernation is to > run a bisection to find the change that broke hibernation. That could > provide sufficient clues for a next step. > > Would that be an option for you? I bisected it and found this: c7121843685de2bf7f3afd3ae1d6a146010bf1fc is first bad commit commit c7121843685de2bf7f3afd3ae1d6a146010bf1fc Author: Magnus Damm Date: Tue Jul 28 14:09:55 2009 -0700 clocksource: Save mult_orig in clocksource_disable() To fix the common case where ->enable() does not set up mult, make sure mult_orig is saved in mult on disable. Also add comments to explain why we do this. Signed-off-by: Magnus Damm Cc: johnstul@us.ibm.com Cc: lethal@linux-sh.org Cc: akpm@linux-foundation.org LKML-Reference: <20090618152432.10136.9932.sendpatchset@rx1.opensource.se> Signed-off-by: Thomas Gleixner :040000 040000 c965062bc79af46cdb3522fc7ab1cc81d2f84de3 26616c88a8128b25fd15c3da39ac6251cd9723b6 M include Reverting this commit fixes the problem. -- Ondrej Zary