Re: [Xen-devel] Linux Xen Balloon Driver Improvement (Draft 2)

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 27/10/14 12:33, Wei Liu wrote:
> 
> ### Periodically exchange normal size pages with huge pages
> 
> Worker thread wakes up periodically to check if there are enough pages
> in normal size page queue to coalesce into a huge page. If so, it will
> try to exchange that huge page into a number of normal size pages with
> XENMEM\_exchange hypercall.

As Andrew recently pointed out[1], changes to a guest's p2m are not
properly handled during migration.  This would have to be fixed before
we can have any sort of background memory exchange process.

David

[1] http://lists.xen.org/archives/html/xen-devel/2014-11/msg01954.html

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