linux-kernel - Re: [PATCH 10/28] i386: map enough initial memory to create lowmem mappings

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Message-ID: <m14pn4owpy.fsf@ebiederm.dsl.xmission.com>
Date:	Wed, 25 Apr 2007 17:33:45 -0600
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Chuck Ebbert <cebbert@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, Andi Kleen <ak@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	virtualization@...ts.osdl.org, lkml <linux-kernel@...r.kernel.org>,
	Zachary Amsden <zach@...are.com>,
	Chris Wright <chrisw@...s-sol.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 10/28] i386: map enough initial memory to create lowmem mappings

Jeremy Fitzhardinge <jeremy@...p.org> writes:

> Eric W. Biederman wrote:
>> Since you have PSE disabled for Xen my hunch is that somehow that
>> got left on for your test boot.
>
> No.  Under Xen cpuid masks out PSE (and complains if you try to set it
> in a pte), but when booting native it will just use a plain unadorned cpuid.

Then why you had to allocate enough pages to cause a failure has me stumped.
Perhaps there is some other bug?

Eric
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