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From: ebiederm@xmission.com (Eric W. Biederman)
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Chuck Ebbert <cebbert@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
       Andi Kleen <ak@suse.de>, Andrew Morton <akpm@linux-foundation.org>,
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       Zachary Amsden <zach@vmware.com>, Chris Wright <chrisw@sous-sol.org>,
       Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH 10/28] i386: map enough initial memory to create lowmem mappings
References: <20070414204154.871250608@goop.org>
	<200704192250.52633.ak@suse.de> <4627D756.5020405@zytor.com>
	<200704192304.01053.ak@suse.de> <4627DB0C.2010804@zytor.com>
	<4627DDAD.4070805@redhat.com> <4627E099.209@goop.org>
	<m1abwwqiof.fsf@ebiederm.dsl.xmission.com> <462FC8CD.1030505@goop.org>
	<m11wi8qflo.fsf@ebiederm.dsl.xmission.com> <462FD0EF.5050706@goop.org>
Date: Sun, 29 Apr 2007 10:44:54 -0600
In-Reply-To: <462FD0EF.5050706@goop.org> (Jeremy Fitzhardinge's message of
	"Wed, 25 Apr 2007 15:06:39 -0700")
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Jeremy Fitzhardinge <jeremy@goop.org> writes:

> Eric W. Biederman wrote:
>> And it just occurred to me PSE disabled, otherwise you would not have
>> needed more than 4 pages.  I supposed you were testing the Xen case.
>>   
>
> No, actually, I wasn't.  It was booting native (the Xen boot path
> doesn't go that way), and it should have booted like a normal native
> kernel despite having Xen compiled in.  Hm, not sure why it wouldn't be
> using the PSE path.

Any chance you had CONFIG_DEBUG_PAGEALLOC selected?

Apparently that also disabled PSE...

Eric