In a Linux system rebooting is not needed frequently. Cloud Linux's new programme KernelCare solves the problem of rebooting the machines while a security patch is added. CloudLinux claims that kernel Care gives orgaisations real time updates. KernelCare is a combination of both open source, a Linux kernel model, and proprietary software. To know more about KernelCare, go through the article by Steven J. Vaughan-Nichols, writer about technology and the business of technology.
http://www.zdnet.com/kernelcare-new-no-reboot-linux-patching-system-7000029127/