This article breaks down the input handling process in Linux, detailing both kernel-level and user-space components. It explains how input devices interact with the kernel, the role of the input core, and the pathway from hardware to user-space through various subsystems.

The article presents a detailed diagram of the Linux disk I/O subsystem, illustrating its various components and the commands associated with each layer. It covers layers from the application to hardware, including the Virtual Filesystem, block layers, disk scheduler, and device drivers. This diagram is part of a broader work on Linux applications in operating systems and computer networks.