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[Xen-devel] help for dirty bitmap



Hi,alls

  As we know,xen 4+Âmaintains a dirty bitmap. Snapshot or migration will use this bitmap.ÂWhen the guest domain changes the memory pageï VMM can capture it and set dirty bitmap to 1.Â

  But I can't know how VMM to maintain this dirty bitmap. Under what circumstances VMM will set the dirty page bitmap to 1, and how to track the page is be dirty?


Thanksï
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