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

To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: [Xen-devel] Re: shadow2 corrupting PV guest state
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Tue, 17 Oct 2006 07:51:02 +0100
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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On 16/10/06 11:09 pm, "Jeremy Fitzhardinge" <jeremy@xxxxxxxx> wrote:

>>  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?

Pretty high. It's used *a lot*. I'm >95% confident the bug is elsewhere.

 -- Keir



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