On Fri, Sep 13, 2024 at 06:55:34PM +0200, Valentin Schneider wrote: > On 13/09/24 07:08, Paul E. McKenney wrote: > > On Sun, Sep 08, 2024 at 09:32:18AM -0700, Paul E. McKenney wrote: > >> > >> Just following up... > >> > >> For whatever it is worth, on last night's run of next-20240906, I got > >> nine failures out of 100 6-hour runs of rcutorture’s TREE03 scenario. > >> These failures were often, but not always, shortly followed by a hard hang. > >> > >> The warning at line 1995 is the WARN_ON_ONCE(on_dl_rq(dl_se)) > >> in enqueue_dl_entity() and the warning at line 1971 is the > >> WARN_ON_ONCE(!RB_EMPTY_NODE(&dl_se->rb_node)) in __enqueue_dl_entity(). > >> > >> The pair of splats is shown below, in case it helps. > > > > Again following up... > > > > I am still seeing this on next-20240912, with six failures out of 100 > > 6-hour runs of rcutorture’s TREE03 scenario. Statistics suggests that > > we not read much into the change in frequency. > > > > Please let me know if there are any diagnostic patches or options that > > I should apply. > > Hey, sorry I haven't forgotten about this, I've just spread myself a bit > too thin and also apparently I'm supposed to prepare some slides for next > week, I'll get back to this soonish. I know that feeling! Just didn't want it to get lost. Thanx, Paul
