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[Xen-devel] Re: [patch 07/26] Xen-paravirt_ops: Allow paravirt backend t

To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: [Xen-devel] Re: [patch 07/26] Xen-paravirt_ops: Allow paravirt backend to choose kernel PMD sharing
From: Ingo Molnar <mingo@xxxxxxx>
Date: Fri, 16 Mar 2007 10:31:19 +0100
Cc: Zachary Amsden <zach@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxx, Rusty Russell <rusty@xxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, William Lee Irwin III <wli@xxxxxxxxxxxxxx>, Chris Wright <chrisw@xxxxxxxxxxxx>, Andi Kleen <ak@xxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
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* Jeremy Fitzhardinge <jeremy@xxxxxxxx> 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@xxxxxxx>

        Ingo

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