Gaurang Khetan Graduate Student, Department of Computer Science, University of Southern California, Los Angeles, CA. firstname.lastname@example.org December 16, 2002
This paper is a study of memory management systems of an operating system. We begin with a brief introduction to memory management systems and then we compare the memory management systems of reallife operating systems - BSD4.4, Windows 2000 and Linux 2.4
based on it. Moreover, it is very well documented in . Windows 2000 was chosen since it is a very popular operating system for use as a desktop especially with beginners, and has now evolved into a mature operating system. Linux  2.4 was chosen because it is growing more and more popular by the day, and seems to have an important place in the future. We will not be much interested in the performance characteristics of these systems in this paper, instead our focus will be on their design and architecture.
In this paper, we will be comparing the Memory Management (MM) Sub-Systems of these operating systems - BSD 4.4, Linux 2.4 and Windows 2000. BSD 4.4 was chosen since it is a representative Unix version including important operating system design principles, and today many operating systems like FreeBSD , NetBSD  and OpenBSD  are 1
Memory Management Systems
The Memory Management System is one of the important core parts of an operating system. Its basic function is to manage the memory hierarchy of RAM and hard disks available on a machine. Its important tasks include allocation and deallocation of memory
to processes taking care of logistics,and implementation of Virtual Memory by utilizing hard disk as extra RAM. The Memory system should be optimized as far as possible, since its performance greatly affects the overall performance and speed of the system.
2.1 Virtual Memory
An important concept in the context of MM Systems... [continues]
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