Linux OS interrupt and interrupt handler

本书中集中讲述和interrupt的章节如下：

章节	主要内容
Chapter 4. Interrupts and Exceptions	讲述interrupt的基础知识，是后续相关章节的基础。内容偏硬件。
Chapter 6. Timing Measurements	讲述hardware devices that underly timing、time-related duties of the kernel
Chapter 13. I/O Architecture and Device Drivers	讲述I/O devices

本文的内容是对这些章节的内容的梳理。

Hardware通过interrupt来通知linux kernel。在Chapter 4. Interrupts and Exceptions中对interrupt进行了分类：

来源		Intel microprocessor manuals
CPU control unit	Synchronous interrupt	exceptions
Other hardware devices at arbitrary times with respect to the CPU clock signals, such as interval timers and I/O devices	Asynchronous interrupt	interrupts

对于hardware的知识，我们不做深入分析，我们重点关注software部分，即由interrupt所触发的kernel control path（是OS层的interrupt handler），我们对一些主要的interrupt和其kernel control path进行总结。