I spent a pleasing hour, thank you.

If I understood it, there is quite a lot between the application (top), and the VFS (just under) that is not described on this diagram, (file table, with locks...).

I wanted to have quick access to all files names (through find /), and now I know that it is cached to the direntry cache of the VFS. It feels good to know where things goes. I will probably come back to these podcast as I need to check info back. Like for a lecture with an associated book :).