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

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2. Roadmap Guide 🎯

This lecture is a roadmap'Linux kernel - basic course for system software developers'is included in the course.

System semiconductors, automotive sector, etc.

Linux Kernel That System Software Developers Must Know

What is the most widely used operating system in IT devices? It's the Linux operating system. It is used in smartphones, digital TVs, aviation entertainment systems, and servers. System semiconductor companies use Linux (Linux device drivers) to control the hardware they design. Additionally, Linux is widely utilized in various components of electric vehicles (Automotive) such as infotainment, autonomous driving, and telematics.

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

Linux system software developers and Linux embedded system (BSP) programmers, pay attention!

However, the Linux kernel is like a massive barrier for beginners in the field of system software. Beginners likely have experienced giving up on learning the Linux kernel multiple times. That difficult Linux kernel is becoming increasingly complex as it evolves with version upgrades.After 2024, the Linux kernel version will be upgraded to v6.6 or higherHowever, the barriers to entry are becoming higher.

Linux system software developers positioned in various fields including system semiconductors and electric vehicles know that they need to understand the Linux kernel well to develop their capabilities. However, it's difficult to grasp how to learn the Linux kernel and, more importantly, what content they need to know well in practical work.

The Reality of Entry-Level or Junior Embedded Linux System Developers

New or junior embedded Linux system developers struggle the most during the problem-solving process. What could be the reason for this?

What development capabilities do Linux system software developers most want to cultivate?

So what is the practical skill that Linux system software developers want to learn most? It's debugging skills. Since debugging is proportional to problem-solving ability, they want to improve their debugging capabilities. While there are many blogs and materials about the Linux kernel, they rarely cover how to systematically solve problems using the latest debugging techniques.

So in Chapter 3 of my book 'Learning Linux Kernel Structure and Principles through Debugging', in the 'Debugging and Code Learning' section, I cover content about debugging.This lecture is a direct lecture by the author of 'Linux Kernel Structure and Principles Learned Through Debugging' and covers the content of Chapter 3 of the book.Additionally, it explains practical debugging methods not covered in books.

You'll learn this kind of content

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

This introduces various methods to improve debugging skills and types of issues that can arise in real-world projects.

It provides a detailed explanation of the kernel debugging process by referencing cases most similar to real-world projects.

This provides a detailed explanation of how to debug the kernel using printk and dump_stack(). It also includes explanations of related reference code.

We will conduct hands-on practice analyzing kernel logs on an actual Raspberry Pi. We will also load memory dumps using the Crash Utility program to open and analyze kernel logs in detail.

This explains in detail how to design device drivers using printk and create debugging patches.

This explains Ftrace, a core debugging feature provided by the Linux kernel. It provides detailed explanations of how to utilize Ftrace and how to configure it.

This provides a detailed explanation of Ftrace messages. In particular, it conducts a detailed analysis of stack traces that can help identify the call flow of functions.

This explains how to analyze kernel source code through Ftrace messages and describes various Ftrace events.

This explains how to configure Ftrace directly on a Raspberry Pi and describes the Ftrace configuration methods. It also covers extracting Ftrace logs and analyzing Ftrace messages from various events.

Based on book writing/teaching experience
Deeper and more detailed than anyone else!

In the domestic system software field, I am the author who wrote the unprecedented! 'Linux Kernel' book and 'Arm Architecture (Armv8-A, Armv7-A)' book. I am also a current developer who knows the latest system software trends (electric vehicles, system semiconductors - system software) best, and an educator who is most actively engaged in knowledge dissemination activities in the system software field.

• 'Learning Linux Kernel Structure and Principles Through Debugging' (2021 Korea Academy Outstanding Book Award) Author

• Author of 'Structure and Principles of Arm Architecture for System Software Development' (2024 Korea Academy Outstanding Book Award)

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

• June 2022, Korea Computer Congress (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 an educator who can explain 'Linux kernel debugging features' and 'troubleshooting methods' better than anyone else in Korea.

Pre-enrollment Reference Information