Journal: Some simple defenitions

a nonpreemptive scheduling algorthim only allows a process to run until it blocks on I/O or voluntarily releases the CPU.

a preemptive scheduling algorithm sets a maximum fixed ammount of time for any given process to run, on I/O blocks or voluntary release, it exists normally.

a slashdot user is nonpreemptive: even if their comments run for hours, they will not be forcibly suspended.