Multithreading methods on a variety of operating systems (Linux, Windows, Mac, Android, etc.) are compared and contrasted. How about describing the CPU Scheduling Algorithm in the same way?

Linux is the only operating system that has all of the concurrent techniques that are being discussed here. Other operating systems do not.

Linux is the only operating system that has all of the concurrent techniques discussed in this article. Other operating systems lack this functionality.

Three computing environments are defined here.

The original Linux kernel wasn't preemptible because of a decision made by the programmers who made it.In a single-processor system, a non-preemptible kernel serves no use. What I don't get is why a multi-processor machine would negate the gain.