On Thu, Feb 6, 2025 at 9:45 PM Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote: > > On Wed, 5 Feb 2025 at 00:09, kernel test robot <oliver.sang@xxxxxxxxx> wrote: > > > > kernel test robot noticed a 7.0% improvement of stress-ng.timerfd.ops_per_sec on: > > I have no idea what the heck that benchmark does, but I am happy to > see that this whole patch series did actually end up improving on the > whole fsnotify cost that I was ranting about in the original > submission. > > Obviously this load doesn't actually do the new pre-event hooks, so it > seems to be all just about how fsnotify_file_area_perm() (or some > other fsnotify hook in the normal read() path) now isn't the > unconditional pig that it used to be. Right. We got this win by slightly modifying semantics of FAN_ACCESS_PERM events, but I cannot imagine that anyone will care (famous last words). It's all about the fact that > > I don't see how that would be worth 7%, but I'll happily take it. > Yeh, I was happy to see that as well :) Thanks, Amir.
