On Mon, Jul 15, 2024 at 08:19:44AM -0700, Kyle Huey wrote: > I think this would probably work but stealing the bit seems far more > complicated than just gating on perf_event_is_tracing(). perf_event_is_tracing() is something like 3 branches. It is not a simple conditional. Combined with that re-load and the wrong return value, this all wants a cleanup. Using that LSB works, it's just that the code aint pretty.