Hi, I'm facing a strange issue while doing a migration from an hypervisor to another one. The migration takes for ever to start moving the memory. The VM had no workload what so ever, just a basic ubuntu image. The versions on the hypervisors are: libvirt 1.2.21, qemu 1.2.3 Command to launche the migration: virsh migrate --verbose --live --abort-on-error --tunnelled --p2p --auto-converge --copy-storage-inc --xml vm-6160.xml 6160 qemu+tls://<destination_hypervisor>/system Here is the log output, look at the time elapsed: root@virt-hv009:~# virsh domjobinfo 6160 Job type: Unbounded Time elapsed: 27518 ms Data processed: 21.506 GiB Data remaining: 29.003 GiB Data total: 50.509 GiB Memory processed: 0.000 B Memory remaining: 520.820 MiB Memory total: 520.820 MiB File processed: 21.506 GiB File remaining: 28.494 GiB File total: 50.000 GiB Constant pages: 0 Normal pages: 0 Normal data: 0.000 B Expected downtime: 300 ms Setup time: 6 ms root@virt-hv009:~# virsh domjobinfo 6160 Job type: Unbounded Time elapsed: 32331 ms Data processed: 25.475 GiB Data remaining: 25.034 GiB Data total: 50.509 GiB Memory processed: 0.000 B Memory remaining: 520.820 MiB Memory total: 520.820 MiB File processed: 25.475 GiB File remaining: 24.525 GiB File total: 50.000 GiB Constant pages: 0 Normal pages: 0 Normal data: 0.000 B Expected downtime: 300 ms Setup time: 6 ms root@virt-hv009:~# virsh domjobinfo 6160 Job type: Unbounded Time elapsed: 49543 ms Data processed: 50.000 GiB Data remaining: 520.820 MiB Data total: 50.509 GiB Memory processed: 0.000 B Memory remaining: 520.820 MiB Memory total: 520.820 MiB File processed: 50.000 GiB File remaining: 0.000 B File total: 50.000 GiB Constant pages: 0 Normal pages: 0 Normal data: 0.000 B Expected downtime: 300 ms Setup time: 6 ms ^^^^ Here after 49 sec, the disk has been process, but the memory hasn't started I skip the logs, but below is the output 5minutes & 56 seconds later, still nothing: root@virt-hv009:~# virsh domjobinfo 6160 Job type: Unbounded Time elapsed: 356919 ms Data processed: 50.000 GiB Data remaining: 520.820 MiB Data total: 50.509 GiB Memory processed: 0.000 B Memory remaining: 520.820 MiB Memory total: 520.820 MiB File processed: 50.000 GiB File remaining: 0.000 B File total: 50.000 GiB Constant pages: 0 Normal pages: 0 Normal data: 0.000 B Expected downtime: 300 ms Setup time: 6 ms Just after it started to move the memory, but 6 minutes later! root@virt-hv009:~# virsh domjobinfo 6160 Job type: Unbounded Time elapsed: 360092 ms Data processed: 50.052 GiB Data remaining: 453.895 MiB Data total: 50.509 GiB Memory processed: 53.224 MiB Memory remaining: 453.895 MiB Memory total: 520.820 MiB Memory bandwidth: 98.172 MiB/s File processed: 50.000 GiB File remaining: 0.000 B File total: 50.000 GiB Constant pages: 3541 Normal pages: 13591 Normal data: 53.090 MiB Expected downtime: 300 ms Setup time: 6 ms root@virt-hv009:~# virsh domjobinfo 6160 error: failed to get domain '6160' error: Domain not found: no domain with matching name '6160' Here the migration is done. But what made it wait more than 5 minutes to start moving the memory? Does anyone knows? Or have any idea what could produce this latency. - Marco