[libvirt] [PATCH 00/16] Implement migration v3 protocol

[Daniel P. Berrange]

This is an major update to

  http://www.redhat.com/archives/libvir-list/2011-February/msg00257.html

In this update

 - Bug fixes from previous review
 - Remove assert() usage
 - Introduce SPICE graphics relocation
 - Refactoring of peer2peer & tunnelled migration code
 - Support for v3 migration with p2p & tunnelled migration
 - A (broken) attempt to make job signal/status updates work
   with tunnelled migration

The latter item seemed to be working fine, but I've since
found that it can cause QEMU to deadlock. While we're sending
QEMU a montor command to update status, QEMU may be trying to
write some migration data and it often blocks on write() to
the migration socket. This could be a bug with us not giving
it a non-blocking socket, or it could be a QEMU limitation.
To be investigated....