What are the events done by the Kernel after a process is being swapped out from the main memory?

When Kernel swaps the process out of the primary memory, it performs the following:

Ø  Kernel decrements the Reference Count of each region of the process. If the reference count becomes zero, swaps the region out of the main memory,

Ø  Kernel allocates the space for the swapping process in the swap device,

Ø  Kernel locks the other swapping process while the current swapping operation is going on,

Ø  The Kernel saves the swap address of the region in the region table.