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On 03/26/2015 07:44 PM, Rui Chen wrote:
> Yes, you are right, but we found our instance hang at first dom.shutdown() call,
> if the dom.shutdown() don't return, there is no chance to execute dom.destroy(),
> right?

Correct.  The code is written assuming dom.shutdown() cannot block indefinitely.

The libvirt docs at 
"https://libvirt.org/html/libvirt-libvirt-domain.html#virDomainShutdown" say 
"...this command returns as soon as the shutdown request is issued rather than 
blocking until the guest is no longer running."

If dom.shutdown() blocks indefinitely, then that's a libvirt bug.

Chris