The document describes a process where an operating system loads a page called M into physical memory from backing storage. Initially the page table entry for M is invalid, causing a trap. The operating system then brings the missing page from backing storage into memory and updates the page table entry, allowing the instruction to restart and execute properly.

1. load M execution Operating System Back Store M Page Table i Physical Memory free frame Were is M? Status: reference By Afnan A. Al Subaihin

2. load M Operating System Back Store M Page Table i Physical Memory free frame Status: Oops! The page that contains M is invalid: issue a trap. reference By Afnan A. Al Subaihin execution

3. load M Operating System Back Store M Page Table i Physical Memory free frame Status: Oops! The page that contains M is invalid: issue a trap. reference trap By Afnan A. Al Subaihin execution

4. load M Operating System Back Store M Page Table i Physical Memory free frame Status: reference trap Problem can be solved: page is in backing store. By Afnan A. Al Subaihin execution

5. load M Operating System Back Store M Page Table i Physical Memory free frame Status: reference trap Bring the missing page into memory. By Afnan A. Al Subaihin execution

6. load M Operating System Back Store M Page Table i Physical Memory free frame Status: reference trap Page is now in memory: update it’s table entry. By Afnan A. Al Subaihin execution

7. load M Operating System Back Store M Page Table Physical Memory free frame Status: reference trap Page is now in memory: update it’s table entry. v By Afnan A. Al Subaihin execution

8. load M Operating System Back Store M Page Table Physical Memory free frame Status: reference trap v Now, restart the instruction to execute it properly By Afnan A. Al Subaihin execution restart