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Linux Kernel Programming

You're reading from   Linux Kernel Programming A comprehensive and practical guide to kernel internals, writing modules, and kernel synchronization

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Product type Paperback
Published in Feb 2024
Last Updated in Apr 2025
Publisher Packt
ISBN-13 9781803232225
Length 826 pages
Edition 2nd Edition
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Author (1):
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Kaiwan N. Billimoria Kaiwan N. Billimoria
Author Profile Icon Kaiwan N. Billimoria
Kaiwan N. Billimoria
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Table of Contents (16) Chapters Close

Preface 1. Linux Kernel Programming – A Quick Introduction 2. Building the 6.x Linux Kernel from Source – Part 1 FREE CHAPTER 3. Building the 6.x Linux Kernel from Source – Part 2 4. Writing Your First Kernel Module – Part 1 5. Writing Your First Kernel Module – Part 2 6. Kernel Internals Essentials – Processes and Threads 7. Memory Management Internals – Essentials 8. Kernel Memory Allocation for Module Authors – Part 1 9. Kernel Memory Allocation for Module Authors – Part 2 10. The CPU Scheduler – Part 1 11. The CPU Scheduler – Part 2 12. Kernel Synchronization – Part 1 13. Kernel Synchronization – Part 2 14. Other Books You May Enjoy
15. Index

Miscellaneous tips on the kernel build

We complete this chapter on building the Linux kernel from source with a few tips. The reason, of course, is that everything may not always go as smoothly as we’d wish it to. Each of the following subsections encapsulates a tip for you to take note of.

Often a point of confusion for folks new to this: once we configure, build, and boot from a new Linux kernel, we notice that the root filesystem and any other mounted filesystems remain identical to what was on the original (distro or custom) system. Only the kernel (and the initramfs image) has changed.

This is entirely intentional, due to the Unix paradigm of having loose coupling between the kernel and the (real) root filesystem. Since it’s the root filesystem that holds all the applications, system tools, and utilities, including libraries, in effect, we can have several kernels (to suit different product flavors, perhaps) for the same base system.

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