From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755726AbZHYSZ2 (ORCPT ); Tue, 25 Aug 2009 14:25:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755547AbZHYSZ1 (ORCPT ); Tue, 25 Aug 2009 14:25:27 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:57136 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755541AbZHYSZ0 (ORCPT ); Tue, 25 Aug 2009 14:25:26 -0400 Date: Tue, 25 Aug 2009 20:25:10 +0200 From: Ingo Molnar To: Arnd Hannemann Cc: Pekka Enberg , Arnd Hannemann , LKML , "hannes@cmpxchg.org" , "torvalds@linux-foundation.org" , Jeremy Fitzhardinge , "xen-devel@lists.xensource.com" , Benjamin Herrenschmidt Subject: Re: [bisected] 2.6.31 regression: fails to boot as xen guest Message-ID: <20090825182510.GA6903@elte.hu> References: <4A9407B1.6020400@nets.rwth-aachen.de> <84144f020908250929t7d4a74f1n4827de04e5c4c56a@mail.gmail.com> <4A94161A.2020609@nets.rwth-aachen.de> <1251219129.4852.1.camel@penberg-laptop> <4A94242E.30309@nets.rwth-aachen.de> <1251223399.13451.5.camel@penberg-laptop> <4A942BDD.70303@nets.rwth-aachen.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4A942BDD.70303@nets.rwth-aachen.de> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.5 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Arnd Hannemann wrote: > Pekka Enberg wrote: > > On Tue, 2009-08-25 at 19:49 +0200, Arnd Hannemann wrote: > >> Hi Pekka, > >> > >> Pekka Enberg wrote: > >>> On Tue, 2009-08-25 at 18:49 +0200, Arnd Hannemann wrote: > >>>>> Thanks for doing the bisect! Can we also see your .config > >>>>> also? > >>>> Config for -rc7 is attached. My bisect configs were based on > >>>> that > >>> Thanks! While we wait for the Xen people, you can try the > >>> following patch to see if we can narrow the bug down to > >>> trap_init(). > >> Yes seems to be trap_init(). -rc7 with this patch applied boots up > >> to the prompt. > > > > Thanks for testing! Ingo, what do you think of the following patch? > > AFAICT, x86-32 is the only architecture playing with traps in > > mem_init() so this should be the safest fix for 2.6.31. > > Hmm, -rc7 + this fix does not work for me :-/ > Still hangs before any output... does earlyprintk=vga tell you anything about precisely where it hangs? Ingo