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RE: [Xen-devel] PAE support revisited

To: James Harper <james.harper@xxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] PAE support revisited
From: Rik van Riel <riel@xxxxxxxxxx>
Date: Tue, 22 Mar 2005 07:29:26 -0500 (EST)
Cc: Kip Macy <kip.macy@xxxxxxxxx>, Karen White <kawhite@xxxxxxxxxx>, Nuutti Kotivuori <naked@xxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxxx
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On Tue, 22 Mar 2005, James Harper wrote:

> that right? What I was hoping for was a mode where Xen might run using
> PAE but could set up memory access for the domains so that they wouldn't
> need to use PAE, provided their memory requirements didn't exceed 4G.

This may well be possible with shadow page tables.
However, just having PAE enabled in the guests and
using writable page tables may well be faster.

-- 
"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it." - Brian W. Kernighan


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