What are the phases of swapping a page from the memory?

Question

Hello
What are the phases of swapping a page from the memory in unix?
please reply me. i am waiting for your reply.
Thanx

Answer 1

Page stealer finds the page eligible for swapping and places the page number in the list of pages to be swapped. Kernel copies the page to a swap device when necessary and clears the valid bit in the page table entry, decrements the pfdata reference count, and places the pfdata table entry at the end of the free list if its reference count is 0.