Clarifications

• Some links:
  • https://manybutfinite.com/post/page-cache-the-affair-between-memory-and-files/
  • http://sylab-srv.cs.fiu.edu/lib/exe/fetch.php?media=paperclub:lkd3ch16.pdf
  • https://www.quora.com/What-is-the-major-difference-between-the-buffer-cache-and-the-page-cache-Why-were-they-separate-entities-in-older-kernels-Why-were-they-merged-later-on