linux-kernel - Re: [patch 07/26] Xen-paravirt_ops: Allow paravirt backend to choose kernel PMD sharing

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Message-ID: <20070316093119.GQ23174@elte.hu>
Date:	Fri, 16 Mar 2007 10:31:19 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Andi Kleen <ak@....de>, Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, virtualization@...ts.osdl.org,
	xen-devel@...ts.xensource.com, Chris Wright <chrisw@...s-sol.org>,
	Zachary Amsden <zach@...are.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	William Lee Irwin III <wli@...omorphy.com>
Subject: Re: [patch 07/26] Xen-paravirt_ops: Allow paravirt backend to choose kernel PMD sharing


* Jeremy Fitzhardinge <jeremy@...p.org> wrote:

> Normally when running in PAE mode, the 4th PMD maps the kernel address 
> space, which can be shared among all processes (since they all need 
> the same kernel mappings.
> 
> Xen, however, does not allow guests to have the kernel pmd shared 
> between page tables, so parameterize pgtable.c to allow both modes of 
> operation.

Acked-by: Ingo Molnar <mingo@...e.hu>

	Ingo
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