Why did the original developers of Linux decide to go with a kernel that was not preemptible? What advantages does a non-preemptible kernel provide to a system with only one processor? Why, though, is the advantage diminished when working with several processors in a single system?

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Why did the original developers of Linux decide to go with a kernel that was not preemptible?
What advantages does a non-preemptible kernel provide to a system with only one processor? Why, though, is the advantage diminished when working with several processors in a single system?

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