Sharing memory

• Two kinds of page-level sharing
  • logical level sharing
    • A remote process maps in a page from a remote cell
    • Operates at the process level
  • Physical level sharing
    • Remote cell OS's borrows the physical page owned by a cell
• Why have two kinds?
  • how to share non-process pages?
    • buffer cache, OS structures?
    • Would a m-kernel design eliminate the need for physical shareing?

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