Epoll详解链接

链接：

https://www.cnblogs.com/lojunren/p/3856290.html （推荐）
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/fs/eventpoll.c?h=v3.16.57 （源码）
https://www.jianshu.com/p/97181ebc0a0f
https://blog.csdn.net/libaineu2004/article/details/77452704
https://blog.csdn.net/wangpengqi/article/details/9933011
http://blog.chinaunix.net/uid-26975042-id-3979456.html
https://blog.csdn.net/linux_wgl/article/details/37378527