[moe]

There is just no benefit to this. Even with ksplice you still have to schedule a downtime for each update because any problems due to a bad patch (or, behold, ksplice bug) would cause an unplanned downtime otherwise.

And as grant-parent said, reboots for kernel-updates are a non-issue in larger deployments anyways. If a simple reboot gives you headache then please ask yourself what happens when (not if!) the hardware on that host fails?