TheLlama

you can also make it so that the driver's programs have a lower nice value (higher priority). This way, if the other users really are hogging cpu, they won't take it from you. I think there is a daemon somewhere that will renice processes based on the uid or process name. If not, it shouldn't be too difficult to write one.

Edit: Dur, I just remembered. Just start all the passenger's consoles (or frontends, whatever) with a lower priority than the driver's console. Every program started from the passenger's consoles will have the priority of the process that spawned it (the shell or the frontend)