From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: shadow2 corrupting PV guest state
Date: Mon, 16 Oct 2006 15:09:52 -0700
Message-ID: <45340330.1000408@goop.org>
References: <C1564AE3.286B%Keir.Fraser@cl.cam.ac.uk>
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To: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
Cc: Chris Wright <chrisw@sous-sol.org>, Michael A Fetterman <Michael.Fetterman@cl.cam.ac.uk>, Tim Deegan <Tim.Deegan@xensource.com>, Xen-devel <xen-devel@lists.xensource.com>
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Keir Fraser wrote:
> The shadow-refcount code in shadow2 is very new. It's likely to have bugs
> that need shaking out.

Yep, that's pretty much what I'd expect.

>  It won't be a deferred pagetable update because they
> don't exist in shadow2 (updates are always synchronously emulated).
>   

OK, so every write to a pagetable page will take the fault&emulate 
path?  What's your confidence level in the emulator?

    J