> Multilevel feedback queues, however, allow a process to move between
Right. With both the regular scheduler and the stair case scheduler you have 140 queues that represent 140 different priorities. You execute the top priorities first in a round robin format. The trick with the stair case scheduler is the logic behind how the processes move from one queue to the other.
> There are a number of variations on this scheme.
Exactly. In some ways, you could say that this was "just" a new variation. But in other ways, it's a pretty inovative variation. ;)
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