Unlocking Linux VFS: How the Virtual File System Powers All File Operations

This article provides a deep technical walkthrough of Linux's Virtual File System (VFS), explaining its design goals, core data structures, caching mechanisms, and step‑by‑step file operation flows—including mount, open, read, and write—while illustrating each concept with concrete code examples and real‑world scenarios.

File OperationsOS InternalsVirtual File System

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Unlocking Linux VFS: How the Virtual File System Powers All File Operations

Liangxu Linux

Aug 7, 2025 · Fundamentals

A Complete Roadmap to Master Linux Kernel Development from Scratch

This guide outlines a step‑by‑step roadmap for aspiring kernel developers, covering essential knowledge foundations, hands‑on teaching‑OS projects, deep‑dive strategies for reading the real Linux kernel source, and curated book recommendations to build solid OS internals expertise.

Linux kernelOS InternalsOperating System

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A Complete Roadmap to Master Linux Kernel Development from Scratch

Deepin Linux

Oct 23, 2024 · Fundamentals

Understanding Linux x86-64 System Call Implementation

This article provides a comprehensive overview of how Linux kernel system calls are implemented on the x86-64 architecture, covering the conceptual differences from regular function calls, register conventions, initialization processes, syscall tables, and practical assembly examples such as write and getpid.

AssemblyOS InternalsSystem Call

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Understanding Linux x86-64 System Call Implementation

Refining Core Development Skills

May 27, 2021 · Fundamentals

Deep Dive into Linux Localhost Network I/O: Kernel-Level Packet Transmission and Reception on 127.0.0.1

This article provides a comprehensive analysis of the Linux kernel's handling of localhost network I/O, detailing how packets destined for 127.0.0.1 bypass physical network interfaces, traverse the routing table, and utilize the loopback virtual device and soft interrupts for efficient intra-machine communication.

Kernel RoutingLinux kernelLoopback Interface

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Deep Dive into Linux Localhost Network I/O: Kernel-Level Packet Transmission and Reception on 127.0.0.1