Curated source guide

Linux source explorer

Explore the Linux kernel source code interactively. Study kernel architecture, system calls, device drivers, and core subsystems with guided learning paths.

Guide chapters

1. Chapter 1 — The Kernel Is Not a Process
2. Chapter 2 — Subsystem Map
3. Chapter 3 — Memory as Responsibility
4. Chapter 4 — From Power-On to Init
5. Chapter 5 — Entering the Kernel
6. Chapter 6 — Execution and Contexts

Key directories

• Documentation/scheduler/ — Scheduler design and kernel thread management
• Documentation/core-api/ — Kernel thread API
• Documentation/kernel-hacking/ — Rules for writing correct kernel code
• init/ — start_kernel() — the first C function after boot
• include/linux/ — task_struct — every process/thread as the kernel sees it (about 850 fields)
• repo:freebsd/freebsd-src/sys/sys/ — FreeBSD struct proc — BSD process identity separated from threads