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Re: [Xen-devel] Essay on an important Xen decision (long)

To: Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] Essay on an important Xen decision (long)
From: Anthony Liguori <aliguori@xxxxxxxxxx>
Date: Wed, 11 Jan 2006 11:38:25 -0600
Cc: "Magenheimer, Dan \(HP Labs Fort Collins\)" <dan.magenheimer@xxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Mark Williamson <mark.williamson@xxxxxxxxxxxx>
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Ian Pratt wrote:

Hint: you need to be propagate dirty and accessed bits back to the guest
pagetable.
Ahh, I see now.  Thanks :-)

Regards,

Anthony Liguori

Of course, I guess it wouldn't be that much of a shock to me that the overhead is at least measurable...

It's certainly measureable, and certainly dominates the virtualization
overhead of some workloads.

Ian



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