Details
Major Description
Run the KVM live migration in a thread so we can monitor it. This will allow us to see how long migrations are taking and do things like pause the vm if migration is stalling (per user defined time limit) to quickly complete migration, or set the domain's max downtime during cut-over between machines (higher values make migration of busy vms easier, lower values may make migration stall). In the future we can add the autoconvergence flag that stalls VMs for a few ticks to allow memory copy to catch up, but it will be awhile before libvirt that's shipped in a distro supports it, so these tunables may be useful now.