> > On Tue, May 28, 2024 at 11:00:54AM +0800, Zqiang wrote: > > This commit make rcu_test_debug_objects() early return when the > > specified cur_ops not set the ->debug_objects. > > > > Signed-off-by: Zqiang <qiang.zhang1211@xxxxxxxxx> > > --- > > kernel/rcu/rcutorture.c | 5 +++-- > > 1 file changed, 3 insertions(+), 2 deletions(-) > > > > diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c > > index 08bf7c669dd3..9b8c277ab91a 100644 > > --- a/kernel/rcu/rcutorture.c > > +++ b/kernel/rcu/rcutorture.c > > @@ -3495,8 +3495,9 @@ static void rcu_test_debug_objects(void) > > return; > > } > > > > - if (WARN_ON_ONCE(cur_ops->debug_objects && > > - (!cur_ops->call || !cur_ops->cb_barrier))) > > + if (!cur_ops->debug_objects || > > + WARN_ON_ONCE(cur_ops->debug_objects && > > You lost me here. Given that we have "!cur_ops->debug_objects" before > that WARN_ON_ONCE(), why do we need "cur_ops->debug_objects" inside of it? > > Also, we don't get here unless the rcutorture.object_debug kernel boot > parameter is specified, don't we really want to WARN_ON_ONCE if the > current flavor does not support that? Hi, Paul The rcutorture.object_debug is set true, but the tasks-tracing does not support duplicate cur_ops->call check, but the debug_objects test was still done. insmod rcutorture.ko torture_type=tasks-tracing fwd_progress=4 n_barrier_cbs=4 object_debug=1 [ 106.082416] rcutorture: WARN: Duplicate call_tasks-tracing() test starting. [ 106.082533] tasks-tracing-torture: rcu_torture_read_exit: Start of test [ 106.082543] tasks-tracing-torture: rcu_torture_read_exit: Start of episode [ 106.105552] rcutorture: duplicated callback was invoked. [ 106.105567] rcutorture: duplicated callback was invoked. [ 106.111269] rcutorture: WARN: Duplicate call_tasks-tracing() test complete. Thanks Zqiang > > Or do you have a use case that needs to silence these warnings? > > Thanx, Paul > > > + (!cur_ops->call || !cur_ops->cb_barrier))) > > return; > > > > struct rcu_head *rhp = kmalloc(sizeof(*rhp), GFP_KERNEL); > > -- > > 2.17.1 > >
