[$] Hierarchical storage management, fanotify, FUSE, and more

Amir Goldstein led a filesystem-track session at the 2024 Linux Storage,
Filesystem, Memory Management, and BPF Summit on his project to build a
hierarchical
storage management (HSM) system using fanotify.
The idea is to monitor file access in order to determine when to retrieve
content from non-local storage (e.g. the cloud). The session was a
follow-up to last year's introduction to the
project, which covered some of the problems he had encountered; this
year, he
was updating attendees on its status and progress, along with some other
problem areas that he wanted to discuss.