[libvirt-users] how to detect if qemu supports live disk snapshot

[Gao Yongwei]

>
> This would work for current versions of qemu, but may not work in the
> future (as HMP does not guarantee stable output) - parsing QMP output
> would be more reliable.  Furthermore, the 'qemu-monitor-command' is
> intentionally unsupported, although this particular use is safe because
> it doesn't change guest state behind libvirt's back.
>
> soga, thanks, :-)
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