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2 terms

7 State Process Model

7 State Process Model
The only ready processes are currently swapped out (Ready/Suspend) but there is no room in main memory for them to be swapped in, so a Blocked process must be swapped out to make room.
Swap in a process from Ready/Blocked if there are currently no processes in Ready. Also, swap in a process which will shortly finish I/O (from Blocked/Suspend to Blocked).