linux-kernel - Re: [bisected] 2.6.31 regression: fails to boot as xen guest

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Message-ID: <4A942BDD.70303@nets.rwth-aachen.de>
Date:	Tue, 25 Aug 2009 20:22:21 +0200
From:	Arnd Hannemann <hannemann@...s.rwth-aachen.de>
To:	Pekka Enberg <penberg@...helsinki.fi>
CC:	Arnd Hannemann <Arnd.Hannemann@...s.rwth-aachen.de>,
	LKML <linux-kernel@...r.kernel.org>,
	"hannes@...xchg.org" <hannes@...xchg.org>,
	"torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	Ingo Molnar <mingo@...e.hu>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: Re: [bisected] 2.6.31 regression: fails to boot as xen guest

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
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