Liangxu Linux

Jul 2, 2020 · Fundamentals

How Does an OS Manage I/O? From Devices to DMA and Interrupts

This article explains the fundamentals of operating‑system I/O management, covering device types, controllers, memory‑mapped I/O, I/O ports, interrupt handling, programmable I/O, DMA, disk scheduling, RAID, stable storage, and clock/timer mechanisms.