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

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....