No reboot patching comes to Linux 4.0
With Linux 4.0, you may never need to reboot your operating system again.
One reason to love Linux on your servers or in your data-center is that you so seldom needed to reboot it. True, critical patches require a reboot, but you could go months without rebooting. Now, with the latest changes to the Linux kernel you may be able to go years between reboots.