On Tue, Feb 24, 2026 at 06:04:35PM -0500, Joel Fernandes wrote: > Add new rcutorture config NOCB02 that enables rcu_nocb_poll boot > parameter combined with CONFIG_RCU_NOCB_CPU to exercise the polling > mode code paths in the NOCB implementation. > > This config exercises poll-mode paths not covered by other configs, > where callback invocation uses active polling instead of kthread > wakeups. > > This config is not added to CFLIST to avoid increasing the default > test duration; it can be run explicitly when poll-mode testing > is needed. > > Signed-off-by: Joel Fernandes <[email protected]>
For 3/4 and 4/4: Reviewed-by: Paul E. McKenney <[email protected]> Tested-by: Paul E. McKenney <[email protected]> > --- > .../selftests/rcutorture/configs/rcu/NOCB02 | 20 +++++++++++++++++++ > .../rcutorture/configs/rcu/NOCB02.boot | 3 +++ > 2 files changed, 23 insertions(+) > create mode 100644 tools/testing/selftests/rcutorture/configs/rcu/NOCB02 > create mode 100644 tools/testing/selftests/rcutorture/configs/rcu/NOCB02.boot > > diff --git a/tools/testing/selftests/rcutorture/configs/rcu/NOCB02 > b/tools/testing/selftests/rcutorture/configs/rcu/NOCB02 > new file mode 100644 > index 000000000000..4c2b8cd6d8fd > --- /dev/null > +++ b/tools/testing/selftests/rcutorture/configs/rcu/NOCB02 > @@ -0,0 +1,20 @@ > +CONFIG_SMP=y > +CONFIG_NR_CPUS=8 > +CONFIG_PREEMPT_NONE=n > +CONFIG_PREEMPT_VOLUNTARY=n > +CONFIG_PREEMPT=y > +#CHECK#CONFIG_PREEMPT_RCU=y > +CONFIG_HZ_PERIODIC=n > +CONFIG_NO_HZ_IDLE=y > +CONFIG_NO_HZ_FULL=n > +CONFIG_RCU_TRACE=y > +CONFIG_HOTPLUG_CPU=y > +CONFIG_RCU_FANOUT=3 > +CONFIG_RCU_FANOUT_LEAF=2 > +CONFIG_RCU_NOCB_CPU=y > +CONFIG_DEBUG_LOCK_ALLOC=n > +CONFIG_PROVE_LOCKING=n > +CONFIG_RCU_BOOST=n > +CONFIG_DEBUG_OBJECTS_RCU_HEAD=n > +CONFIG_RCU_EXPERT=y > +CONFIG_RCU_EQS_DEBUG=y > diff --git a/tools/testing/selftests/rcutorture/configs/rcu/NOCB02.boot > b/tools/testing/selftests/rcutorture/configs/rcu/NOCB02.boot > new file mode 100644 > index 000000000000..c212ae299b0b > --- /dev/null > +++ b/tools/testing/selftests/rcutorture/configs/rcu/NOCB02.boot > @@ -0,0 +1,3 @@ > +rcupdate.rcu_self_test=1 > +rcu_nocbs=all > +rcu_nocb_poll > -- > 2.34.1 >
