Another diablo-backport tagged upstream bug: https://bugs.launchpad.net/nova/+bug/850602 However, I haven't tested block migration at all yet in F16 ... so perhaps this bug with it is the least of our worries :)
A fix is proposed for this now: https://review.openstack.org/#change,716
openstack-nova-2011.3-5.fc16 has been submitted as an update for Fedora 16. https://admin.fedoraproject.org/updates/openstack-nova-2011.3-5.fc16
openstack-nova-2011.3-6.el6 has been submitted as an update for Fedora EPEL 6. https://admin.fedoraproject.org/updates/openstack-nova-2011.3-6.el6
Package openstack-nova-2011.3-5.fc16: * should fix your issue, * was pushed to the Fedora 16 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing openstack-nova-2011.3-5.fc16' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2011-14897 then log in and leave karma (feedback).
openstack-nova-2011.3-6.fc16 has been submitted as an update for Fedora 16. https://admin.fedoraproject.org/updates/openstack-nova-2011.3-6.fc16
openstack-nova-2011.3-6.fc16 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report.
openstack-nova-2011.3-8.el6 has been submitted as an update for Fedora EPEL 6. https://admin.fedoraproject.org/updates/openstack-nova-2011.3-8.el6
openstack-nova-2011.3-8.el6 has been pushed to the Fedora EPEL 6 stable repository. If problems still persist, please make note of it in this bug report.