Bless Me, Ultima

Gain a firm practical understanding of the fundamentals of Linux kernel internals, learn to write high-quality kernel module code, and kernel synchronization Key Features Discover how to write Linux kernel and module code for real-world products Implement industry-grade techniques in real-world scenarios for fast, efficient memory allocation and data synchronization Understand and exploit kernel architecture, CPU scheduling, and kernel synchronization techniques Book Description The 2nd Edition of Linux Kernel Programming is an updated, comprehensive introduction for new programmers to the Linux kernel. This book uses the recent 5.10 Long-Term Support (LTS) Linux kernel series, which will be maintained until 2026, showing 5.X/6.X new features. In this new edition, you’ll start the journey by learning how to build the kernel from source, including doing a kernel build for the popular Raspberry Pi. You’ll then learn, step by step, how to write your first kernel module by leveraging the kernel’s powerful Loadable Kernel Module (LKM) framework. You’ll then get to delve into key kernel internals topics including Linux kernel architecture, memory management, and CPU scheduling. You’ll understand the deep issues of concurrency, and gain insight into how they can be addressed with various locking technologies (mutexes, spinlocks, atomic / refcount operators and even lock-free technologies). By the end of this 2nd Edition book, you’ll have a better understanding of the fundamentals of writing Linux kernel and kernel module code that can be used in real-world projects and products. What you will learn Configure and build the 5.10 / 6.x kernels from source Write high-quality modular kernel code (LKM framework) for 5.10 / 6.x kernels Explore the Linux kernel architecture Get to grips with key internals details regarding memory management within the kernel Understand and work with various dynamic kernel memory alloc/dealloc APIs Discover key internals aspects regarding CPU scheduling within the kernel Gain a deeper understanding of kernel concurrency issues Learn how to work with key kernel synchronization primitives Who This Book Is For This book is for beginner Linux programmers and developers looking to get started with Linux kernel, providing a knowledge base to understand required kernel internal topics and overcome frequent and common development issues. A basic understanding of Linux CLI and C programming is assumed Table of Contents Kernel Workspace Setup Building the 5.x Linux Kernel from Source - Part 1 Building the 5.x Linux Kernel from Source - Part 2 Writing Your First Kernel Module - LKMs Part 1 Writing Your First Kernel Module - LKMs Part 2 Kernel Internals Essentials - Processes and Threads Memory Management Internals - Essentials Kernel Memory Allocation for Module Authors - Part 1 Kernel Memory Allocation for Module Authors - Part 2 The CPU Scheduler - Part 1 The CPU Scheduler - Part 2 Kernel Synchronization - Part 1 Kernel Synchronization - Part 2 Gain both a firm practical understanding and sufficient theoretical insight into the inner workings of Linux kernel internals, learn to write high-quality kernel module code, understand the complexities of kernel synchronization Purchase of the print or Kindle book includes a free eBook in PDF format.Key FeaturesDiscover how to write Linux kernel and module code for real-world productsImplement industry-grade techniques in real-world scenarios for fast, efficient memory allocation and data synchronizationUnderstand and exploit kernel architecture, CPU scheduling, and kernel synchronization techniquesBook DescriptionThe 2nd Edition of Linux Kernel Programming is an updated, comprehensive guide for new programmers to the Linux kernel. This book uses the recent 6.1 Long-Term Support (LTS) Linux kernel series, which will be maintained until Dec 2026, and also delves into its many new features. Further, the Civil Infrastructure Project has pledged to maintain and support this 6.1 Super LTS (SLTS) kernel right until August 2033, keeping this book valid for years to come! You'll begin this exciting journey by learning how to build the kernel from source. In a step by step manner, you will then learn how to write your first kernel module by leveraging the kernel's powerful Loadable Kernel Module (LKM) framework. With this foundation, you will delve into key kernel internals topics including Linux kernel architecture, memory management, and CPU (task) scheduling. You'll finish with understanding the deep issues of concurrency, and gain insight into how they can be addressed with various synchronization/locking technologies (e.g., mutexes, spinlocks, atomic/refcount operators, rw-spinlocks and even lock-free technologies such as per-CPU and RCU). By the end of this book, you'll have a much better understanding of the fundamentals of writing the Linux kernel and kernel module code that can straight away be used in real-world projects and products.What you will learnConfigure and build the 6.1 LTS kernel from sourceWrite high-quality modular kernel code (LKM framework) for 6.x kernelsExplore modern Linux kernel architectureGet to grips with key internals details regarding memory management within the kernelUnderstand and work with various dynamic kernel memory alloc/dealloc APIsDiscover key internals aspects regarding CPU scheduling within the kernel, including cgroups v2Gain a deeper understanding of kernel concurrency issuesLearn how to work with key kernel synchronization primitivesWho this book is forThis book is for beginner Linux programmers and developers looking to get started with the Linux kernel, providing a knowledge base to understand required kernel internal topics and overcome frequent and common development issues. A basic understanding of Linux CLI and C programming is assumed.