Linux/Unix的五种I/O模型：

• 阻塞I/O
• 非阻塞I/O
• I/O复用(select和poll)
• 信号驱动I/O（SIGIO)
• 异步I/O

Linux I/O Stack

I/O related books: https://hatter-source-code.googlecode.com/svn/trunk/attachments/wiki/linux/io/

Related: Study_Network_IOMultiplexing

参考资料

[1]. http://jasonwu.me/2012/12/04/the_unp_reading_notes_io_model.html