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What’s Actually In The Page Table?

Learn about the organization and contents of page tables used for virtual to physical memory mapping. Understand the roles of valid, protection, present, dirty, and reference bits in managing memory access and page replacement decisions.

Linear page table

Let’s talk a little about page table organization. The page table is just a data structure that is used to map virtual addresses (or really, virtual page numbers) to physical addresses (physical frame numbers). Thus, any data structure could work. The simplest form is called a linear page table, which is just an array. The OS indexes the array by ...