Database System Concepts
Database System Concepts
7th Edition
ISBN: 9789332901384
Author: Henry F. Korth & S. Sudarshan Abraham Silberschatz
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 18, Problem 6PE

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Access-protection mechanism

  • The access protection mechanism is used to implement page level locking.
  • First reads operation is considered.
  • A process is allowed to read a page only after it read-locks the page.
  • It is implemented by using mprotect for initially turning off read permissions to all pages, for the process.
  • When the process tries to access an address in a page, then there occurs a protection violation...

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