I'm running XCP using the packages supplied with the recently released Ubuntu 12.04. I have a small Linux HVM VM running and am trying to get vm-checkpoint working. When I run it without pausing the VM, it gives me the error:
You attempted an operation on a VM which requires PV drivers to be installed but the drivers were not detected. When I use vm-pause, vm-checkpoint, vm-unpause, it seems to succeed. However, the new VHD file in my /var/run/sr-mount isn't large enough to have recorded the VM's RAM. snapshot-revert, obviously, does not work correctly. Instead, it just puts the existing VM in a halted state. Is the vm-checkpoint generation error logged somewhere? I couldn't find anything definitive, except that there appear to be several "Premature termination of connection!" errors in xcp-xapi.log. Is there a way to get vm-checkpoint working? What are the constraints? Do I need a paravirt guest? Thanks, -Jim
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