From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andi Kleen <ak@suse.de>
Subject: Re: [patch 05/24] Xen-paravirt_ops: Add pagetable accessors to pack
	and unpack pagetable entries
Date: Wed, 21 Feb 2007 23:15:12 +0100
Message-ID: <200702212315.12883.ak@suse.de>
References: <20070221205254.169835700@goop.org>
	<20070221205322.869165491@goop.org>
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On Wednesday 21 February 2007 21:52, Jeremy Fitzhardinge wrote:
> Add a set of accessors to pack, unpack and modify page table entries
> (at all levels).  This allows a paravirt implementation to control the
> contents of pgd/pmd/pte entries.  For example, Xen uses this to
> convert the (pseudo-)physical address into a machine address when
> populating a pagetable entry, and converting back to pphys address
> when an entry is read.

Do you have some lmbench numbers before/after this change? =

iirc at least fork and exit do a lot of pte accesses in various forms.
If it's measurable it might be needed to patch those for the native case.

-Andi