I just have a bug, and I don't know if it's was resolve with new version of kvm (> 0.12.5).
When I run a vm and trough the monitor i enter
migrate "exec:gzip -c > /home/ahmet/tmp/snap-debian.gz"
The command overlaps (I have wait 30minutes) on a rel image (using with kvm-img create -b ...).
But with a "proper" image, the migration take 30s.
Savevm/loadvm (on rel img) work perfectly but savevm is very long and migrate seems to resolve this problem.
I just want know if it's "normal" or a bug ?
I'm french, sorry for my poor english.