Why did the original developers of Linux choose a non-preemptive multitasking kernel? Why would you want to use a non-preemptible kernel if you only have access to a single CPU? When using a system with several CPUs, why would this be a negative?

Database System Concepts
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Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Why did the original developers of Linux choose a non-preemptive multitasking kernel?
Why would you want to use a non-preemptible kernel if you only have access to a single CPU? When using a system with several CPUs, why would this be a negative?

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