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

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Message-ID: <m1wszv6sft.fsf@ebiederm.dsl.xmission.com>
Date:	Sun, 29 Apr 2007 10:44:54 -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:
>> 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
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