This document discusses various policies and algorithms used by operating systems for virtual memory management, including fetch policies, page replacement policies, and algorithms like optimal page replacement, NRU, FIFO, LRU, NFU, and working set. It covers topics like placement policies, scope of replacements, hardware and software LRU implementations, and load control policies for cleaning and resident set management.

1. Chapter 3.3: Operating System Policies for VM

2. Fetch Policy

3. Placement Policy

4. Replacements Policy

5. Replacements Algorithm Objectives

6. Placement Algorithms

7. Scope of Replacements

8. Optimal Replacement

9. Optimal Replacement

10. Optimal Replacement Example

11. NRU

12. NRU Implementation

13. NRU Algorithm

14. FIFO

15. FIFO Example

16. LRU

17. LRU Example

18. LRU Example

19. Hardware LRU

20. Software LRU: NFU

21. NFU Example

22. Modified NFU : ~LRU

23. Modified NFU : ~LRU

24. Compare NFU and ~LRU

25. Resident Set Mangement

26. Factor Include

27. Resident set Mnag. Polcy.

28. Allocation Vesus Scope

29. Fixed Allocation, Local Scope

30. Variable Allocation, Global Scope

31. Variable Allocation, Local Scope

32. Working Set

33. Working Set

34. Working Set Implementation

35. Cleaning Policy

37. Load Control