On Thu, 27 Jun 2024 at 09:32, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote: > > getdent subtest: > +4.1 lockref_put_return > +5.7 lockref_get_not_dead > +68.0 native_queued_spin_lock_slowpath For this getdents load, the main call chains that terminate in the queued spinlock case seem to be .lockref_get_not_dead.__legitimize_path.try_to_unlazy_next.lookup_fast .lockref_get_not_dead.__legitimize_path.try_to_unlazy.lookup_fast .lockref_get_not_dead.__legitimize_path.try_to_unlazy.link_path_walk .dput.terminate_walk.path_openat.do_filp_open which is interesting because I would have expected the readdir() code itself to show up. But the proc_pident_readdir profiles have all gone down, presumably because there's just much fewer of them. That part shows no spinlock in the profile at all. WTH is that benchmark doing? The only readdir that shows up is for what looks like some /proc filesystem thing. Linus