[$] An update on fanotify

In a filesystem-track session at the 2026 Linux Storage,Filesystem, Memory Management, and BPF Summit, Amir Goldstein updatedattendees on the fanotifyfilesystem-event monitoring subsystem. He wanted to describe changes that had come in the last year orso, as well as upcoming features and some remaining challenges in hisefforts to use fanotify for hierarchicalstorage management (HSM). Fanotify is the user-space API for monitoringfiles, directories, and filesystems for events of various sorts(e.g. opening or deleting a file).