[Qemu-devel] Re: [PATCH 3/3] Add KVM support to QEMU

[Avi Kivity]

Anthony Liguori wrote:

> > I think live migration is now broken, since kvm accesses will not 
> > update the qemu dirty bitmap.
>
> Eh?  I don't follow you here.

guest writes in qemu set the qemu dirty bitmap (for 
cpu_physical_memory_get_dirty()), but guest accesses in kvm won't, 
unless you enable dirty tracking and synchronize kvm's bitmap to 
qemu's.  See the changes to migration.c in kvm's qemu.

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