[libvirt-users] Problem with the use of domfsfreeze mountpoint option

Peter Krempa pkrempa at redhat.com
Fri Nov 14 10:33:32 UTC 2014

On 11/12/14 22:17, Eric Blake wrote:
> On 11/12/2014 10:24 AM, Michal Privoznik wrote:


>> Although, I see a way that we could get something reasonable here. If
>> qemu would tell us whenever somebody (dis-)connects (from)to the virtio
>> channel. That way we could query the qemu-ga capabilities and make good
>> decisions. And whenever we see a disconnect, we may just forget the
>> qemu-ga capabilities and claim guest agent unresponsive (instead of this
>> ping algorithm I'd came up with).
> Yes, qemu now provides that, as of qemu 2.1.  It is the VSERPORT_CHANGE
> event that fires whenever the guest opens or closes its connection to
> the channel.  And yes, we have more than one reason why we should wire
> up libvirt to track when that event happens - we ALSO have people
> requesting that we expose the information to management apps as a
> libvirt event.

I'm currently writing code to add this feature/event.


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