The Backend Engineering Show with Hussein Nasser

Page Tables

December 15, 2025·46 min
Episode Description from the Publisher

Page tables provide the mapping between virtual memory and physical memory for each process. This means it needs to be as efficient and as fast as possible. I explore the inner workings of page tables in this episode.0:00 Intro2:00 Virtual Memory ⁃ ⁃ 8:00 MMU10:00 Page Tables ⁃ ⁃ ⁃ ⁃ ⁃ ⁃ ⁃ 11:30 Single Table Byte Addressability   ⁃ ⁃ ⁃ ⁃ ⁃ ⁃ ⁃ ⁃ 16:00 Single Table Page addressability  ⁃ ⁃ ⁃ ⁃ ⁃ 19:00 Multi-level Paging (Radix tree) ⁃ ⁃ 31:00 Huge Tables ⁃ ⁃ 33:00 TLB ⁃ ⁃ Summary

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