Talk:Microprocessor Design/Virtual Memory

The information regarding page faults is incomplete. The majority of page faults occur when the MMU/TLB detects an invalid page access. This can either be a read/write exception, a user/supervisory exception or a "page not present" exception. If the last is true and the page is mapped onto the page file (disk space) then it will be loaded into random access memory. Else, there is an invalid page fault and the operating system will typically kill the user-mode process.