A Conversation about Priority Levels

PwNzAgE33: ok so in assembly language we learned that processes in the cpu get set priority levels
PwNzAgE33: 0-7, 7 being the highest priority
PwNzAgE33: this is the example the book gives
PwNzAgE33: "For example, a computer's payroll program may run overnight, and at PL0. It has all night to finish - not terribly urgent. A program that corrects for a nuclear power plant current surge may run at PL6. We are perfectly happy to let the payroll wait while the nuclear power correction keeps us from being blown to bits."
PwNzAgE33: this begs two questions
PwNzAgE33: first
PwNzAgE33: who in the hell is running payroll and a nuclear power surge correction on the same machine
PwNzAgE33: and second, if nuclear power surge correction gets PL6, what on God's green earth gets a fucking PL7?


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