On Thu, Jul 20, 2023 at 05:30:53PM +0100, Valentin Schneider wrote: > We now have an RCU_EXPORT knob for configuring the size of the dynticks > counter: CONFIG_RCU_DYNTICKS_BITS. > > Add a torture config for a ridiculously small counter (2 bits). This is ac > opy of TREE4 with the added counter size restriction. > > Link: http://lore.kernel.org/r/4c2cb573-168f-4806-b1d9-164e8276e66a@paulmck-laptop > Suggested-by: Paul E. McKenney <paulmck@xxxxxxxxxx> > Signed-off-by: Valentin Schneider <vschneid@xxxxxxxxxx> > --- > .../selftests/rcutorture/configs/rcu/TREE11 | 19 +++++++++++++++++++ > .../rcutorture/configs/rcu/TREE11.boot | 1 + > 2 files changed, 20 insertions(+) > create mode 100644 tools/testing/selftests/rcutorture/configs/rcu/TREE11 > create mode 100644 tools/testing/selftests/rcutorture/configs/rcu/TREE11.boot > > diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE11 b/tools/testing/selftests/rcutorture/configs/rcu/TREE11 > new file mode 100644 > index 0000000000000..aa7274efd9819 > --- /dev/null > +++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE11 > @@ -0,0 +1,19 @@ > +CONFIG_SMP=y > +CONFIG_NR_CPUS=8 > +CONFIG_PREEMPT_NONE=n > +CONFIG_PREEMPT_VOLUNTARY=y > +CONFIG_PREEMPT=n > +CONFIG_PREEMPT_DYNAMIC=n > +#CHECK#CONFIG_TREE_RCU=y > +CONFIG_HZ_PERIODIC=n > +CONFIG_NO_HZ_IDLE=n > +CONFIG_NO_HZ_FULL=y > +CONFIG_RCU_TRACE=y > +CONFIG_RCU_FANOUT=4 > +CONFIG_RCU_FANOUT_LEAF=3 > +CONFIG_DEBUG_LOCK_ALLOC=n > +CONFIG_DEBUG_OBJECTS_RCU_HEAD=n > +CONFIG_RCU_EXPERT=y > +CONFIG_RCU_EQS_DEBUG=y > +CONFIG_RCU_LAZY=y > +CONFIG_RCU_DYNTICKS_BITS=2 Why not just add this last line to the existing TREE04 scenario? That would ensure that it gets tested regularly without extending the time required to run a full set of rcutorture tests. > diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE11.boot b/tools/testing/selftests/rcutorture/configs/rcu/TREE11.boot > new file mode 100644 > index 0000000000000..a8d94caf7d2fd > --- /dev/null > +++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE11.boot > @@ -0,0 +1 @@ > +rcutree.rcu_fanout_leaf=4 nohz_full=1-N > -- > 2.31.1 >
