kernel live patch

You talk about a commercial offering from http://www.canonical.com/

If you need this for Proxmox VE, go for KernelCare

(There are so far no other plans for Proxmox VE 4.x)
 
Commercial maybe I guess. It's free from conical for the first three machines. Also it's based on kernel upstream code that is open source. But you did answer my question thanks!