CODEWITHSUNDEEP
operating-systemcpu-architecturepagingvirtual-memorypage-tables
Robert Piterson
Robert Piterson

Reputation: 11

The size of a Page Table entry

Is the size of a Page Table Entry is dependent on the total size of the logical / virtual memory space of a process?

Upvotes: 1

Views: 1145

Answers (1)

Nate Eldredge
Nate Eldredge

Reputation: 58825

No, the size and format of a page table entry is generally fixed by the hardware and is always the same. For example on x86-32 a page table entry is always 4 bytes, with the following layout (image by Alboin via OSDev Wiki):

enter image description here

Of course, a process occupying more virtual memory will use a larger number of page table entries, since it will have more page tables that are marked present. But the size of each one will still be 4 bytes.

Upvotes: 5

Related Questions