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[Xen-devel] Re: shadow2 corrupting PV guest state

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: [Xen-devel] Re: shadow2 corrupting PV guest state
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Mon, 16 Oct 2006 15:09:52 -0700
Cc: Chris Wright <chrisw@xxxxxxxxxxxx>, Michael A Fetterman <Michael.Fetterman@xxxxxxxxxxxx>, Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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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

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