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[<masumotok@xxxxxxxxxxxxx>]

> I'm afraid we are not on same page. What API layer are you talking about?
> I suppose we're talking about totally different thing.
> 
> What I ment by qemu savevm is the command which is typed on qemu command line.
> Whose prompt is "(qemu)". qemu savevm doesn't terminates the instance, and
> the guest continues executing after savevm.
> By looking at libvirt code I confirmed that libvirt API
> virDomainSnapshotCreateXML() eventually issues qemu command, savevm, on the
> qemu monitor(HMP).
> 

Ops. I was thinking you mentioned "virsh save". That's seems to be my misunderstanding. BTW, using virDomainSnapshotCreateXML() is different from current implementation of snapshot() in libvirt driver?