When Kernel swaps the process out of the primary memory, it performs the following:
• 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,
• Kernel allocates the space for the swapping process in the swap device,
• Kernel locks the other swapping process while the current swapping operation is going on,
• The Kernel saves the swap address of the region in the region table.