“Unlike Kpatch and Ksplice, which patch the running kernel without rebooting, Live Update Orchestrator takes a hybrid approach. While it requires a reboot, it focuses on keep critical devices running, which minimizes the side effects of the update.”

• Google is developing Live Update Orchestrator, a new system for updating the Linux kernel with minimal downtime.
• This technology is focused on cloud environments, allowing hypervisors to be updated without completely interrupting running virtual machines.
• Live Update is a specialized reboot process that keeps certain devices operational through kernel transitions.
• A new device infrastructure (dev_liveupdate) is introduced to integrate with the Live Update Orchestrator system.

https://en.hwlibre.com/Google-develops-Live-Update-Orchestrator-for-Linux-kernel-hot-updates/

The Linux Kernel Patch: https://lore.kernel.org/lkml/20250320024011.2995837-1-pasha.tatashin@soleen.com/