From: Ian Campbell <ijc@hellion.org.uk>
To: Joel Becker <Joel.Becker@oracle.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>, Jeremy Fitzhardinge <jeremy@goop.org>,
       Jody Belka <lists-lkml@pimb.org>, linux-kernel@vger.kernel.org,
       Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
       "Eric W. Biederman" <ebiederm@xmission.com>,
       Andi Kleen <andi@firstfloor.org>,
       Mika Penttila <mika.penttila@kolumbus.fi>
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Date: Wed, 20 Feb 2008 22:30:24 +0000
Message-Id: <1203546624.26910.76.camel@cthulhu.hellion.org.uk>
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Subject: Re: 2.6.25-rc1 xen pvops regression
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On Wed, 2008-02-20 at 13:42 -0800, Joel Becker wrote:
> 	What changed to make this not work in the first place?  New dmi
> code?

I don't think so -- this code is present even in the 2.6.18-xen.hg tree
(where it's gated with is_initial_domain() which isn't suitable for the
upstream tree).

I don't really know why it should start happening now. It may be that
some of the recentish changes to e.g. early_ioremap or early pagetable
setup etc. have tweaked the layout of the early pagetables around so
this problem bites us more readily. Or it may just be a combination of
kernel image size, RAM size and perhaps a dose of bad luck.

Ian.
-- 
Ian Campbell

... at least I thought I was dancing, 'til somebody stepped on my hand.
		-- J. B. White

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