tailieunhanh - Lecture Operating systems: Internalsand design principles (7/e): Chapter 7 - William Stallings

Chapter 7 - Memory management. After studying this chapter, you should be able to: Discuss the principal requirements for memory management, understand the reason for memory partitioning and explain the various techniques that are used, understand and explain the concept of paging,. | Operating Systems: Internals and Design Principles Chapter 7 Memory Management Seventh Edition William Stallings Operating Systems: Internals and Design Principles I cannot guarantee that I carry all the facts in my mind. Intense mental concentration has a curious way of blotting out what has passed. Each of my cases displaces the last, and Mlle. Carère has blurred my recollection of Baskerville Hall. Tomorrow some other little problem may be submitted to my notice which will in turn dispossess the fair French lady and the infamous Upwood. — THE HOUND OF THE BASKERVILLES, Arthur Conan Doyle Memory Management Terms Memory Management Requirements Memory management is intended to satisfy the following requirements: Relocation Protection Sharing Logical organization Physical organization Relocation Programmers typically do not know in advance which other programs will be resident in main memory at the time of execution of their program Active processes need to be able to be swapped in and out of main memory in order to maximize processor utilization Specifying that a process must be placed in the same memory region when it is swapped back in would be limiting may need to relocate the process to a different area of .

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