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Question 54

What are the translation tables?

Answer

These tables are used to perform address translation. In case of 4KB pages, there are four levels of them:

  • PML4
  • PDP
  • PD
  • PT

There is only one PML4 table per address space (which is unique for each process). Each table at any level contains up to 512 entries (4 KB / 8 bytes per entry). Each entry stores either a part of the address of the table of the next level, or, at the last level, the physical address of the page frame.

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