Linux Kernel Structure and Principles: Interrupt Bottom Half [Author's Direct Lecture Part 1-6]

1. 30% discount coupon issued for breaking 500 participants🙏

To commemorate breaking 500 students in the Linux kernel course, we are issuing a 30% discount coupon. Thank you. First come, first served for 100 people.

• 30% discount coupon link: https://inf.run/Bx6Lw

2. Roadmap Guide 🎯

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

If you're a system software developer in fields like system semiconductors and automotive

Essential Linux Kernel Knowledge

What is the most widely used operating system across all IT devices? It's the Linux operating system. It is used in smartphones, digital TVs, aviation entertainment systems, and servers. System semiconductor companies utilize Linux (Linux device drivers) to control the hardware they design. Additionally, Linux is extensively used 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, the Linux kernel can be considered the content that requires the most essential foundational knowledge currently needed in the 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 probably have experience giving up on learning the Linux kernel multiple times. That difficult Linux kernel is becoming increasingly complex as it evolves through 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 get a sense of how to learn the Linux kernel and, most importantly, what content they need to know well in practical work.

The core of the core of Linux device driver development: Interrupt bottom half

When starting as a Linux system software developer, most people develop Linux device drivers, and one of the elements that must be implemented and optimized in this process is interrupts. Interrupt bottom halfis essential content that must be understood along with interruptsThat's right. The reasons for this include several points:

• Most interrupt handlers are used together with interrupt bottom half techniques.

• The main issue with peripheral devices controlled through interrupts is identified in the routines related to the interrupt bottom half - along with the interrupt handler.

So in Chapter 6 of my book 'Structure and Principles of the Linux Kernel', I explain the following 'interrupt bottom half techniques'.

• threaded IRQ (IRQ thread)

• Softirq

• Taskrit

I've structured it so that readers can learn interrupt bottom-half techniques through ftrace debugging practice in various ways.

Differentiation Points of the Course

This course consists of content that has never been covered on YouTube or any other lecture platform before! We debug various data structures that make up the Linux kernel (task_struct, thread_info structures) and data structures related to Linux kernel interrupt bottom-half techniques through Linux kernel memory dumps. Students taking this course can download an educational program (TRACE32) to practice hands-on.

You'll learn this kind of content

Explains the overall flow of interrupt processing and why interrupt bottom-half techniques are necessary.

This introduces the threaded IRQ method, which is widely used as a technique for the latter half of interrupt handling, and explains its core functionality.

Explains the execution flow of the threaded IRQ technique from a big picture perspective and provides detailed explanations of the source code.

This introduces patches related to threaded IRQ and explains how to configure ftrace. It provides detailed explanations of ftrace messages and the execution flow of threaded IRQ techniques together.

We will analyze data structures related to the threaded IRQ method in detail using TRACE32 and Crash Utility programs.

Introduces Softirq and explains why you need to understand Softirq well.

This provides a detailed explanation of the types of Softirq services, which are the core of Softirq, and the step-by-step execution flow.

Softirq service request and execution operations are explained in detail through overall execution flow and source code analysis.

Explains the ksoftirqd/[n] kernel thread, which is a daemon that executes Softirq services, and provides a detailed analysis of tasklets.

Explains Softirq-related ftrace tracepoints and provides detailed analysis of ftrace messages.

Educational TRACE32 (Simulator) program and 6 Linux kernel memory dumps provided

In this lecture, we will explain the data structures and call stack that make up the interrupt bottom half technique while debugging Linux kernel memory dumps, which is the most advanced debugging method in the Linux system software industry.

Provides advanced debugging methods for debugging Linux kernel memory using debugging programs such as TRACE32 and Crash utility.

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

Global Author & Linux System Software Developer (Arm, RISC-V Architecture)

In the domestic system software field, this is an unprecedented! author who wrote books on 'Arm Architecture (Armv8-A, Armv7-A)' and 'Linux Kernel' (both books were selected as excellent books by the Korean Academy), and is a global author who was the first in Korea to write the book "Reverse Engineering Armv8-A Systems" (in English) through an overseas publisher (Packt). Above all, they are a current industry developer who best understands the latest system software trends (electric vehicles, system semiconductors - system software). They are also an educator who is most actively engaged in knowledge dissemination activities in the system software field.

• 'Reverse Engineering Armv8-A Systems: A practical guide to Kernel, Firmware, and TrustZone analysis' book (English) author, (Packt Publishing)

• '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 (1st~2nd cohorts)

• 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 the major functions that make up the Linux kernel better than anyone else in Korea.

Pre-enrollment Notes