https://lwn.net/Articles/457667/
https://lwn.net/Articles/457667/
https://lwn.net/Articles/457667/
http://www.snia.org/sites/default/orig/NVM2014_ppt/Moyer-linux-pm-nvm-summit-2014.pdf
https://lwn.net/Articles/457667/
http://duartes.org/gustavo/blog/post/page-cache-the-affair-between-memory-and-files/
http://duartes.org/gustavo/blog/post/how-the-kernel-manages-your-memory/