eBPF

eBPF File Watching

• Periodically polling for changes is potentially slow and intensive.
• inotify (kernel subsystem that monitors changes to the filesystem)
  • recursive directory watches (X)
  • Fixed-sized buffer. Can overflow.
  • No native debouncing support.
  • Race conditions.
  • API issues (no event information.)
• Having a more native File Watcher would be nice.
• Matt Rickard

Yeah exactly! Two benefits (1) callbacks closer to the metal and (2) tough to fit all file watching use cases in a single AP] and deliver good performance (not all consumers care about recursive watching, dropping events, etc)

— Matt Rickard (@mattrickard) October 7, 2022