On Sat, Jun 22, 2024 at 03:41:19PM GMT, Linus Torvalds wrote: > On Sat, 22 Jun 2024 at 14:25, Mateusz Guzik <mjguzik@xxxxxxxxx> wrote: > > > > +cc Linus > > Thanks. > > > To sum up the problem: stat and statx met with "" + AT_EMPTY_PATH have > > more work to do than fstat and its hypotethical statx counterpart: > > - buf alloc/free for the path > > - userspace access (very painful on x86_64 + SMAP) > > - lockref acquire/release > > Yes. That LOOKUP_EMPTY_NOCHECK is *not* the fix. I have explicitly NAKed an approach like this months ago in [1]. So I'm not sure why we're getting that patch in the first place tbh. [1]: https://lore.kernel.org/lkml/599df4a3-47a4-49be-9c81-8e21ea1f988a@xxxxxxxxxx
