linux-kernel - Re: [PATCH 7 of 13] Make __FIXADDR_TOP variable to allow it to make space for a hypervisor

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Date:	Tue, 1 Aug 2006 07:34:28 -0700
From:	Andrew Morton <akpm@...l.org>
To:	Chris Wright <chrisw@...s-sol.org>
Cc:	jeremy@...source.com, linux-kernel@...r.kernel.org,
	chrisw@...s-sol.org, Christian.Limpach@...cam.ac.uk,
	clameter@....com, ebiederm@...ssion.com, kraxel@...e.de,
	hollisb@...ibm.com, ian.pratt@...source.com, rusty@...tcorp.com.au,
	zach@...are.com
Subject: Re: [PATCH 7 of 13] Make __FIXADDR_TOP variable to allow it to make
 space for a hypervisor

On Tue, 1 Aug 2006 02:03:30 -0700
Chris Wright <chrisw@...s-sol.org> wrote:

> * Jeremy Fitzhardinge (jeremy@...source.com) wrote:
> > -#define MAXMEM			(-__PAGE_OFFSET-__VMALLOC_RESERVE)
> > +#define MAXMEM			(__FIXADDR_TOP-__PAGE_OFFSET-__VMALLOC_RESERVE)
> 
> In the native case we lose one page of lowmem now.

erm, isn't this the hunk which gave one of my machines a 4kb highmem zone?
I have memories of reverting it.
-
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