Linux kernel design (jserv Huang Jingqun)

In this online lecture, we use Thorsten Leemhuis's opening speech at FOSDEM 2020 "Linux kernel – Solving big problems in small steps for more than 20 years" as the main axis, and try to summarize the Linux kernel version 2.4 since the first year of the 21st century. As of today's 5.x version, how do core developers overcome the problems of SMP, scalability, various hardware architectures and peripheral device support? In the process, they proposed to completely remove BKL (Big kernel lock) and implement virtualization technology ( Such as Xen and KVM), proposed namespace and cgroups to establish the ability of containerization (container), and then the core development star technology eBPF will bring XDP and what amazing mechanisms on the existing basis? In addition, the Linux core has finally been officially incorporated into PREEMPT_RT, which has been in development for more than ten years, making the Linux core a hard real-time operating system. What impact will it have on the internal design? The successor of AIO, io_uring, allows Linux to have more elegant and efficient asynchronous I/O access. How should we think about it?

• Chapter 1：Online physical course description (3 hours and 15 minutes and 20 seconds)

• Chapter 2：code review I (3 hours and 12 minutes and 43 seconds)

• Chapter 3：code review II (3 hours and 11 minutes and 2 seconds)

• Chapter 4：Online and physical course descriptions (2 hours and 35 minutes and 10 seconds)

• Chapter 5：Week 1 homework lab0 (59 minutes and 6 seconds)

• Chapter 6：Week 1 homework list (28 minutes and 58 seconds)

• Chapter 7：Second week homework fibdrv (46 minutes and 12 seconds)

• Chapter 8：Second week homework kcalc (34 minutes and 33 seconds)

• Chapter 9：Homework instructions for weeks 4 and 5 (3 hours and 8 minutes and 31 seconds)

• Chapter 10：Operating system terms and concepts (3 hours and 10 minutes and 11 seconds)

• Chapter 11：Review of development trends (3 hours and 4 minutes and 51 seconds)

• Chapter 12：Use user mode linux for development and analysis (2 hours and 54 minutes and 59 seconds)

• Chapter 13：Observe operating system behavior through eBPF (3 hours and 5 minutes and 52 seconds)

• Chapter 14：System calls that bring an application to life (2 hours and 47 minutes and 47 seconds)

• Chapter 15：A process that is not just an execution unit (3 hours and 7 minutes and 38 seconds)

• Chapter 16：A scheduler that does more than just pick tasks 1 (3 hours and 5 minutes and 35 seconds)

• Chapter 17：A scheduler that doesn’t just pick tasks 2 (3 hours and 2 minutes and 53 seconds)

• Chapter 18：Memory management one (3 hours and 5 minutes and 35 seconds)

• Chapter 19：Memory management 2 (3 hours and 8 seconds)

• Chapter 20：Memory management three (2 hours and 41 minutes and 10 seconds)

• Chapter 21：Interrupt handling and modern architecture considerations (2 hours and 56 minutes and 37 seconds)

• Chapter 22：Interrupt handling and modern architecture considerations (3 hours and 2 minutes and 5 seconds)

• Chapter 23：File system concepts and implementation techniques (3 hours and 5 minutes and 15 seconds)

• Chapter 24：Timer and its management mechanism (3 hours and 16 minutes and 38 seconds)

• Chapter 25：A brief discussion on synchronization mechanism (3 hours and 6 minutes and 21 seconds)

• Chapter 26：Multi-core processors and spinlock (3 hours and 32 minutes and 10 seconds)

• Chapter 27：RCU synchronization mechanism (3 hours and 38 seconds)

• Chapter 28：Under RCU synchronization mechanism (3 hours and 10 minutes and 28 seconds)

• Chapter 29：scalability issue (3 hours and 8 minutes and 46 seconds)

• Chapter 30：PREEMPT RT moves towards a hard real-time operating system (2 hours and 50 minutes and 3 seconds)

• Chapter 31：PREEMPT RT moves towards a hard real-time operating system (2 hours and 58 minutes and 29 seconds)