Understanding the Linux Kernel

Daniel P Bovet

ISBN 10: 0596000022 / ISBN 13: 9780596000028

Published by O'Reilly Media, 2000

About this Item

Why is Linux so efficient? Is it the right operating system for a particular application? What can be learned from looking at the kernel source code? These are the kinds of questions that this text takes in stride in this guided tour of the code that forms the core of all Linux operating systems. The book aims to help readers understand how Linux performs best and how it meets the challenge of different environments. Theauthors introduce each topic by explaining its importance, and show how kernel operations relate to the utilities that are familiar to Unix programmers and users. Major topics include: memory management, including file buffering, process swapping, and direct memory access (DMA); the virtual file system and the second extended file system; process creation and scheduling; signals, interrupts, and the essential interfaces to device drivers; timing; synchronization in the kernel; inter-process communication (IPC); and program execution.

Seller Inventory # CIN0596000022G

Bibliographic Details

• Title: Understanding the Linux Kernel
• Publisher: O'Reilly Media
• Publication Date: 2000
• Language: English
• ISBN 10: 0596000022
• ISBN 13: 9780596000028
• Binding: Soft cover
• Condition: Good

About this title

Synopsis

Linux is presented too often as a casual hacker experiment. It has increasingly become not only a mission-critical part of many organizations, but a sophisticated display of programming skill. It incorporates many advanced operating system concepts and has proven itself extremely robust and efficient for a wide range of uses. 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.

Review

Understanding the Linux Kernel is intended to be read by those who are happy to check points off against the source code. The first thing you learn is how Linux, released from commercial constraints, is able to take advantage of the best ideas from other systems, implemented in wonderfully flexible ways. A good example is the Virtual File System (VFS), which has made it easy to add support for file systems from almost every other OS. It's fascinating to find out how such features are implemented. Then, there are loadable modules, I/O, scheduling, multitasking, multiprocessing, interrupts, spin locks, semaphores, and all of the other goodies that are involved in making a kernel work.

The authors are concerned primarily with the Linux 2.2 kernel. They discuss how Linus Torvald's decisions on kernel issues translate into architecture; for example, how the Linux memory management uses a slab allocator on top of a buddy system for greater efficiency. Similarly, at the cost of a little complexity, the decision to use three-level memory paging, when two work fine on 32-bit systems, makes it possible to port to 64-bit processors without changes. The tradeoffs between complexity and efficiency are discussed for most kernel features, and each chapter finishes with related new features in kernel 2.4.

Despite the lucid and knowledgeable writing, you'll come up against some brain-stretching complexity. Nevertheless, this book is an important addition to the Linux canon. --Steve Patient, Amazon.co.uk