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Date: Tue, 25 Aug 2009 20:22:21 +0200
From: Arnd Hannemann <hannemann@nets.rwth-aachen.de>
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To: Pekka Enberg <penberg@cs.helsinki.fi>
CC: Arnd Hannemann <Arnd.Hannemann@nets.rwth-aachen.de>,
       LKML <linux-kernel@vger.kernel.org>,
       "hannes@cmpxchg.org" <hannes@cmpxchg.org>,
       "torvalds@linux-foundation.org" <torvalds@linux-foundation.org>,
       Jeremy Fitzhardinge <jeremy@goop.org>,
       "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
       Ingo Molnar <mingo@elte.hu>,
       Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: [bisected] 2.6.31 regression: fails to boot as xen guest
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>
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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...

Best regards,
Arnd