Linux Kernel Structure and Principles: Debugging - Basic [Author's Direct Lecture Part 1-2]

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This lecture <Structure and Principles of the Linux Kernel: Debugging - Basic [Author's Direct Lecture Part 1-2]> 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 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 Reality of Being a New or Junior Embedded Linux System Developer

What are the most common problems faced by new or junior embedded Linux system developers when solving a problem? Why?

What development skills do Linux system software developers most want to develop?

Ultimately, what practical skill do Linux system software developers want to learn the most? It is debugging skills . Debugging is proportional to problem-solving skills, so they want to improve their debugging skills. There are many blogs and materials about the Linux kernel, but they rarely cover how to systematically solve problems using the latest debugging techniques.

So, in Chapter 3 of 'Learning the Structure and Principles of the Linux Kernel through Debugging' that I wrote, I cover the contents of debugging and code learning. This lecture is a lecture directly delivered by the author of 'Learning the Structure and Principles of the Linux Kernel through Debugging' and covers the contents of Chapter 3 of the book. In addition, it explains practical debugging methods that are not covered in the book.

Learn about these things

Explains in detail why debugging is important in real-world projects and the actual debugging process.

We introduce various ways to improve your debugging skills and the types of issues that can arise in real-world projects.

We will explain in detail the process of kernel debugging by referring to a case that is most similar to a real-world project.

This article explains in detail how to debug the kernel using printk and dump_stack(). Related reference code is also provided.

We will practice checking and analyzing kernel logs on an actual Raspberry Pi. We will also load memory dumps into the Crash Utility program and open the kernel logs for detailed analysis.

This article details how to design device drivers and create debugging patches using printk.

Describes Ftrace, a core debugging feature provided by the Linux kernel. In particular, it explains in detail how to utilize Ftrace and how to configure it.

Describes Ftrace messages in detail, especially the stack trace, which can help you understand the function call flow.

Explains how to analyze kernel source through Ftrace messages and the various Ftrace events.

We will explain how to set up Ftrace by setting it up directly on the Raspberry Pi. We will also extract the Ftrace log and analyze the Ftrace messages for various events.

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 'Structure and Principles of Arm Architecture for System Software Development' ( 2024, Korean Academy of Sciences Outstanding Book Award )

• '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 'Linux kernel debugging function' and 'troubleshooting methods' better than anyone else in Korea.

Things to note before taking the class