kGraft — live kernel patching from SUSE

Live migration has its limits, including a short period of time between when the VM stops on the old host, the last few memory updates are forwarded to the new host, and the VM starts again. For some applications, that time may be long enough to be considered downtime, even if it's a fraction of a second. Those are the applications which benefit from live patching and reduction in the number of events where software must be updated.