Operating Systems Implementation

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TRACK

A project-oriented bridge that turns operating-system mental models into traceable implementation decisions for a small kernel, from boot and privilege transitions through memory, scheduling, syscalls, I/O, isolation, and debugging.

How can I trace a small kernel from boot to user-visible behavior, preserve invariants across traps, memory, scheduling, I/O, and isolation, and explain the implementation trade-offs?

16 lessons

Continues to Backend Runtime, I/O, and Performance/ Cloud, Container, and Supply Chain Security/ Compiler Construction, Runtimes, and Virtual Machines/ Concurrency, Memory Models, and Lock-Free Systems/ Containers, Kubernetes, and Platform Runtime/ Database Engine Internals and Implementation/ Engine Systems, Tooling, and Performance/ Filesystem and Storage Implementation/ Game Engine Runtime Patterns/ GPU Systems and Accelerators/ I/O Stacks, Device Drivers, and Storage Paths/ Kernel Networking and eBPF/ Memory Systems and Allocators/ Network Protocols and Transport Systems/ Transaction Manager Implementation/ Virtualization and Hypervisor Systems

LESSONS

1. 001
   Kernel Project Map, Boot Flow, and Machine Contract
   [TODO]
2. 002
   Privilege, Address Spaces, and Kernel Boundaries
   [TODO]
3. 003
   Interrupts, Exceptions, and Trap Handling
   [TODO]
4. 004
   Physical Memory, Page Tables, and Allocation
   [TODO]
5. 005
   Kernel Heap, Object Lifetimes, and Resource Ownership
   [TODO]
6. 006
   Processes, Threads, and Context Switching
   [TODO]
7. 007
   Scheduler Policy, Timers, and Blocking
   [TODO]
8. 008
   System Calls, Copy Boundaries, and User-Kernel ABI
   [TODO]
9. 009
   Synchronization Inside the Kernel
   [TODO]
10. 010
    Files, Inodes, and the Virtual Filesystem Interface
    [TODO]
11. 011
    Block I/O, Buffer Cache, and Writeback
    [TODO]
12. 012
    Device Driver Model, MMIO, DMA, and Interrupts
    [TODO]
13. 013
    Networking Path and Packet Buffers
    [TODO]
14. 014
    Containers as Kernel Namespace and Resource-Control Mechanisms
    [TODO]
15. 015
    Kernel Debugging, Testing, and Failure Analysis
    [TODO]
16. 016
    OS Implementation Capstone: Build and Explain a Small Kernel CAPSTONE
    [TODO]

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