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Understanding the Linux Kernel helps readers understand how Linux performs best and how it meets the challenge of different environments. The authors introduce each topic by explaining its importance, and show how kernel operations relate to the utilities that are familiar to Unix programmers and users. | E HGM I O PORTS TO PROCESS MANAGEMENT O REILLY DANIEL p. BOVET it MARCO CESAT1 Understanding the LINUX EL Understanding the Linux Kernel Daniel P. Bovet Marco Cesati Publisher O Reilly First Edition October 2000 ISBN 0-596-00002-2 702 pages Understanding the Linux Kernel helps readers understand how Linux performs best and how it meets the challenge of different environments. The authors introduce each topic by explaining its importance and show how kernel operations relate to the utilities that are familiar to Unix programmers and users. Table of Contents Preface . 1 The Audience for This Book.1 Organization of the Material.1 Overview of the Book.3 Background Information.4 Conventions in This Book.4 How to Contact Us.4 Acknowledgments .5 1. Introduction.6 1.1 Linux Versus Other Unix-Like Kernels.6 1.2 Hardware Dependency.10 1.3 Linux Versions.11 1.4 Basic Operating System Concepts.12 1.5 An Overview of the Unix Filesystem.16 1.6 An Overview of Unix Kernels.22 2. Memory Addressing.36 2.1 Memory Addresses.36 2.2 Segmentation in Hardware.37 2.3 Segmentation in Linux.41 2.4 Paging in Hardware.44 2.5 Paging in Linux.52 2.6 Anticipating Linux 2.4.63 3. Processes.64 3.1 Process Descriptor.64 3.2 Process Switching.78 3.3 Creating Processes.86 3.4 Destroying Processes.93 3.5 Anticipating Linux 2.4.94 4. Interrupts and Exceptions.96 4.1 The Role of Interrupt Signals.96 4.2 Interrupts and Exceptions.97 4.3 Nested Execution of Exception and Interrupt Handlers.106 4.4 Initializing the Interrupt Descriptor Table.107 4.5 Exception Handling.109 4.6 Interrupt Handling.112 4.7 Returning from Interrupts and Exceptions.126 4.8 Anticipating Linux 2.4.129 5. Timing Measurements.131 5.1 Hardware Clocks.131 5.2 The Timer Interrupt Handler.133 5.3 PIT s Interrupt Service Routine.134 5.4 The TIMER_BH Bottom Half Functions.136 5.5 System Calls Related to Timing Measurements.145 5.6 Anticipating Linux .
