Linux Kernel Structure and Principles: Processes [Author's Direct Lecture Part 1-4]

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This lecture <Structure and Principles of the Linux Kernel: Process [Author Direct Lecture Part 1-4]> is a roadmap 'Linux kernel - basic course for system software developers' This lecture is included in .

System semiconductors, automotive fields, etc.

Linux Kernel: A Must-Know for System Software Developers

What is the most used operating system in all IT devices? It is the Linux operating system. It is used in smart phones, digital TVs, aviation entertainment systems, and servers. System semiconductor companies use Linux (Linux device drivers) to control the hardware they design. Linux is also widely used in various components (infotainment, autonomous driving, telematics) that make up electric vehicles (Automotive).

The core of the Linux operating system is the Linux kernel. Along with the Armv8-A architecture, the Linux kernel can be considered the most essential foundational knowledge required in the current system software industry.

Attention Linux System Software Developers and Linux Embedded System (BSP) Programmers!

However, the Linux kernel is a huge barrier for beginners in the field of system software. Beginners may have given up several times while learning the Linux kernel. The difficult Linux kernel version is evolving more and more complex as it is upgraded. After 2024, the Linux kernel version will be upgraded to v6.6 or higher , which makes the entry barrier higher.

Linux system software developers who are deployed in various fields including system semiconductors and electric vehicles know that they need to know the Linux kernel well to improve their development capabilities. However, it is difficult to get a sense of how to learn the Linux kernel and, above all, what content they need to know well in practice.

The first process beginners learn in the Linux kernel

What topics do beginners learn first when learning the Linux kernel? Most learn processes. The book 'Linux Kernel' starts with processes. Processes are also said to be a must-know topic along with file systems and memory systems.

How do beginners feel when they start learning the process? They think the process is something they absolutely must know, but they get bored easily. Why is that? They think there is no content that can be applied directly to real-world projects. Also, the process is boring because there is a lot of vague content. In the end, even if you study hard, the content you learn does not stay for a long time.

So, in my book 'Structure and Principles of the Linux Kernel', I have structured it in a variety of ways so that readers can learn the process through ftrace debugging practice.

Differentiating Points of the Lecture

This lecture consists of content that has never been covered on YouTube or any other lecture platform before ! We will debug the task_struct and thread_info structures representing processes through Linux kernel memory dumps. Those who take this lecture can download the educational program (TRACE32) and practice it themselves.

Learn about these things

We will explain about processes, one of the three major resources in the Linux system, and why you should learn about processes. We will provide an easy introduction to the basic concepts of processes.

Describes the execution space of a process and explains why you need to know about it.

Analyze the basic behavior of a process using the Crash-Utility and TRACE32 debugging programs.

The task_struct structure, which stores and manages process attribute information, is analyzed using the TRACE32 and Crash-Utility debugging programs.

Describes the current macro, which is widely used in various functions and subsystems of the Linux kernel. Kernel source code

We analyze in detail down to the assembly code level.

Describes the flow of process execution in a multi-core system architecture. Also describes the data structures related to it.

Debug the process creation and termination in detail using the TRACE32 program. Explain the process's data structure and function call flow in detail. (Students can download the TRACE32 program and kernel memory dump uploaded in this lecture and practice by following along.)

We will use the TRACE32 program to analyze in detail the interrupt context information of the process in which the interrupt handler is executed. We will explain the interrupt context by analyzing the ftrace messages extracted from the crash-utility program.

Analyze the dump's data structures and call stack together with the Linux kernel source code.

Provides educational TRACE32 program and 8 Linux kernel memory dumps

This lecture introduces the most advanced debugging method in the Linux system software industry - debugging Linux kernel memory dumps by Linux kernel developers at Qualcomm, a world-class system semiconductor company. It provides an advanced debugging method that can 'debug Linux kernel memory' by utilizing debugging programs such as TRACE32 and Crash utility.

Based on my experience writing books and giving lectures
More in-depth and detailed than anyone else!

The author of the book 'Linux Kernel' and 'Arm Architecture (Armv8-A, Armv7-A)', which is unprecedented in the domestic system software field! He is also a working developer who knows the latest system software trends (electric vehicles, system semiconductors - system software) the best, and an educator who is most active in spreading knowledge in the system software field.

• Author of 'Learning the Structure and Principles of the Linux Kernel through Debugging' ( 2021, Korean Academy of Sciences Outstanding Book Award )

• Author of 'Arm Architecture Structure and Principles for System Software Development' (2023)

• 'Programmers Dev Course: Linux System and Kernel Expert' Main Instructor

• June 2022, Korea Computer Conference (KCC2022) - Tutorial presentation [Conquering the Linux Kernel using ftrace]

• LG Electronics 'Linux Kernel' and 'Armv8 Architecture' In-house Instructor ( including domestic and overseas developers ) - (2020~2024)

I can confidently say that I am the educator who can explain the major functions that make up the Linux kernel better than anyone else in the country.

Things to note before taking the class