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

from [Paul Durrant] [Permanent Link][Original]
To: James Harper <james.harper@xxxxxxxxxxxxxxxx>, Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>
Subject: RE: [Xen-devel] what happens when a PoD page is touched?
From: Paul Durrant <Paul.Durrant@xxxxxxxxxx>
Date: Mon, 16 May 2011 10:27:16 +0100
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Thread-topic: [Xen-devel] what happens when a PoD page is touched? 
> -----Original Message-----
> 
> I've not seen any slowdown on boot with any version of Windows until
> I go to actually do the balloon down...
> 

In that case I guess your slowdown is caused by touching the pages. IIRC you 
will encounter a sweep every time you touch a pod page and the cache is 
exhausted. The sweep should reap all zeroed pages and hopefully fill the cache 
so the sweep should not be invoked too often. Try using the non-touching 
allocator.

  Paul

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