Demand Paging

Demand Paging

Lazy loading of pages into memory only when referenced, and the step-by-step page-fault handling sequence that makes it work.

What is a Page Fault?

A page fault is a hardware trap raised by the MMU when a running program accesses a virtual memory page that is not currently mapped to a physical frame, forci…

What is Demand Paging?

Demand paging is a virtual memory technique where a page is loaded into physical memory only when a process actually references it, rather than loading the who…

What is Pure Demand Paging?

Pure demand paging is a memory management policy where absolutely no page of a process is loaded into RAM until the process actually references it, so every pr…

What is Prepaging?

Prepaging is a memory management optimization where the OS loads a batch of pages it predicts a process will need into RAM before they are actually referenced,…