Ubuntu
qemu package

  1. Bug #1647389
  2. Comment #26

Comment 26 for bug 1647389

Revision history for this message
Dave Chiluk (chiluk) wrote :

I have been able to create a smaller recreation environment for this.
1. Create a VM on shared storage solution. In my case NFS.
2. set start_libvirtd="yes" in /etc/default/libvirt-bin
3. systemctl restart libvirt-bin
4. virsh -c qemu+ssh://${FROM}/system migrate --live --p2p --tunnelled ${VM} qemu+tcp://ubuntu@${TO}/system
5. Repeat until failure to migrate, then check /var/log/libvirt/qemu/<vm>.log for error from above.

* Yes --live, --p2p, and --tunnelled are all required to reproduce afaik.

Using this reproducer I was able to identify upstream commit 4eae2a6 as the first good SHA where the migration starts working again.

Unfortunately this does not cherry-pick cleanly, and it appears that the virtqueue management has changed significantly as well. I'm currently trying to figure what other patches are needed to make the qemu virtqueue stable.