Re: [Xen-devel] help for dirty bitmap

2015-11-16 Thread Ian Campbell
On Sun, 2015-11-15 at 13:13 +0800, 高强 wrote: > Hi,alls > >     As we know,xen 4+ maintains a dirty bitmap. Snapshot or migration > will use this bitmap. When the guest domain changes the memory page, VMM > can capture it and set dirty bitmap to 1.  > >     But I can't know how VMM to maintain thi

[Xen-devel] help for dirty bitmap

2015-11-15 Thread 高强
Hi,alls As we know,xen 4+ maintains a dirty bitmap. Snapshot or migration will use this bitmap. When the guest domain changes the memory page, VMM can capture it and set dirty bitmap to 1. But I can't know how VMM to maintain this dirty bitmap. Under what circumstances VMM will set the di