From 6c3d9ad795a212ccfdfc0359524ab0d040c58757 Mon Sep 17 00:00:00 2001 From: Joel Fernandes Date: Mon, 5 Jan 2026 03:42:56 -0500 Subject: rcutorture: Add NOCB02 config for nocb poll mode testing 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. Acked-by: Frederic Weisbecker Reviewed-by: Paul E. McKenney Tested-by: Paul E. McKenney Signed-off-by: Joel Fernandes --- .../testing/selftests/rcutorture/configs/rcu/NOCB02 | 20 ++++++++++++++++++++ .../selftests/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 (limited to 'tools/testing') 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 -- cgit v1.2.3