操作系统相关

用户进程缓冲区与内核缓冲区

http://www.360doc.com/content/18/0512/20/36367108_753420333.shtml

linux中的页缓存和文件IO

https://blog.csdn.net/gdj0001/article/details/80136364

Python零拷贝

https://www.jianshu.com/p/50b58f7a4844