Paging and segmentation

• Paging: fixed block sizes

  • Easy to map, translate, replace, transfer to/from disk
  • Does not correspond to semantic objects, hence internal fragmentation

• Segmentation

  • “Difficult” to translate (need to check segment length) , place and replace (external fragmentation), transfer to/from disk
  • Corresponds to semantic objects

• Segmentation with paging

  • Good for large objects
  • Breaks up page tables

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