I'd like to know if this is an hypervisor related problem or a libvirt one.

I did this experiment: on VM I started watching a video on youtube.

While video was in progress I started migration.

Migration did not complete until video was not finished.

I did another experiment: I installed a web server on VM.

I then started an httperf stress test.

As before migration did not complete until the stress test was closed.

Is this normal?