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RE: [Xen-devel] what happens when a PoD page is touched?

To: Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>, James Harper <james.harper@xxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] what happens when a PoD page is touched?
From: Paul Durrant <Paul.Durrant@xxxxxxxxxx>
Date: Mon, 16 May 2011 10:21:17 +0100
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Thread-topic: [Xen-devel] what happens when a PoD page is touched?
> -----Original Message-----
> Ideally, once Hyper-V brings in an interface for dynamic memory
> ballooning in guests, we can use that and avoid this whole rigmarole
> for new windows version.

Yes, it would be nice if newer viridian-aware kernels did not zero-scrub memory 
at start of day. This was certainly not what we observed with original windows 
7 kernels, which relied on the zero-scrubbing having been done where older 
kernels did not (particularly when setting up pagetables IIRC). That pre-dates 
ballooning in hyper-V of course so I guess it'd be worth examining the 
behaviour of an SP1 system at start of day.


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