Deepin Linux

May 19, 2026 · Fundamentals

Master the Linux fasync Mechanism and Understand Signal‑Driven Asynchronous Notification

This article explains the Linux kernel fasync mechanism, compares it with other I/O models, details the underlying data structures and key functions, and provides step‑by‑step driver and user‑space code examples for implementing signal‑driven asynchronous notifications in embedded and Linux driver development.