Book Image

Mastering Linux Kernel Development

By : CH Raghav Maruthi
Book Image

Mastering Linux Kernel Development

By: CH Raghav Maruthi

Overview of this book

Mastering Linux Kernel Development looks at the Linux kernel, its internal arrangement and design, and various core subsystems, helping you to gain significant understanding of this open source marvel. You will look at how the Linux kernel, which possesses a kind of collective intelligence thanks to its scores of contributors, remains so elegant owing to its great design. This book also looks at all the key kernel code, core data structures, functions, and macros, giving you a comprehensive foundation of the implementation details of the kernel’s core services and mechanisms. You will also look at the Linux kernel as well-designed software, which gives us insights into software design in general that are easily scalable yet fundamentally strong and safe. By the end of this book, you will have considerable understanding of and appreciation for the Linux kernel.
Table of Contents (19 chapters)
Title Page
About the Author
About the Reviewer
Customer Feedback

Process address space

The following diagram depicts the layout of a typical process address space in Linux systems, which is composed of a set of virtual memory segments:

Each segment is physically mapped to one or more linear memory blocks (made out of one or more pages), and appropriate address translation records are placed in a process page table. Before we get into the complete details of how the kernel manages memory maps and constructs page tables, let's understand in brief each segment of the address space:

  • Stack is the topmost segment, which expands downward. It contains stack frames that hold local variables and function parameters; a new frame is created on top of the stack upon entry into a called function, and is destroyed when the current function returns. Depending on the level of nesting of the function calls, there is always a need for the stack segment to dynamically expand to accommodate new frames. Such expansion is handled by the virtual memory manager through page faults...