linux-kernel - Re: [PATCH] x86: Construct 32 bit boot time page tables in native format.

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Message-ID: <4799248F.9080404@goop.org>
Date:	Thu, 24 Jan 2008 15:51:43 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Ian Campbell <ijc@...lion.org.uk>, Ingo Molnar <mingo@...e.hu>,
	Mika Penttilä <mika.penttila@...umbus.fi>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: [PATCH] x86: Construct 32 bit boot time page tables in native
 format.

H. Peter Anvin wrote:
> Yes.  We'd use it during initialization and at other times when we 
> need trampolining, but give the swapper something which only has the 
> kernel map.

Hm, though Xen makes it all a bit more complex, as usual.  In the PAE 
case it wouldn't allow the pmd to be shared, so you'd have to allocate a 
new pmd and copy into it.  There's probably a way to deal with it within 
the existing paravirt hooks...

    J
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