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McKenney wrote: > As of v7.0-rc1, architectures that support preemption, including x86 and > arm64, no longer support CONFIG_PREEMPT_NONE or CONFIG_PREEMPT_VOLUNTARY. > Attempting to build kernels with these two Kconfig options results in > .config errors. This commit therefore switches such rcutorture scenarios > to CONFIG_PREEMPT_LAZY. > > Signed-off-by: Paul E. McKenney > > --- > > Changes since v2: > > o Fold in c69ac5693540 ("rcutorture: Adjust scenarios for default > lazy preemption") > > Changes since v1: > > o Add CONFIG_PREEMPT_DYNAMIC=n in order to test non-preemptible RCU. > > o Remove CONFIG_PREEMPT_COUNT=n because it conflicts with > CONFIG_PREEMPT_LAZY=y. > > o Remove some stray conflicting CONFIG_PREEMPT_LAZY=n instances. > [...] > diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE04 b/tools/testing/selftests/rcutorture/configs/rcu/TREE04 > index 34aee1acb8662..ac857d5bcb222 100644 > --- a/tools/testing/selftests/rcutorture/configs/rcu/TREE04 > +++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE04 > @@ -1,11 +1,12 @@ > CONFIG_SMP=y > CONFIG_NR_CPUS=8 > +CONFIG_PREEMPT_LAZY=y > CONFIG_PREEMPT_NONE=n > -CONFIG_PREEMPT_VOLUNTARY=y > +CONFIG_PREEMPT_VOLUNTARY=n > CONFIG_PREEMPT=n > CONFIG_PREEMPT_DYNAMIC=n > -CONFIG_PREEMPT_LAZY=n > #CHECK#CONFIG_TREE_RCU=y > +#CHECK#CONFIG_PREEMPT_RCU=n nit: Let us add this #CHECK# to the other configs you changed too? Otherwise it is a bit confusing because it took some digging to clearly see that PREEMPT_DYNAMIC=n and PREEMPT_LAZY=y implies CONFIG_PREEMPT_RCU=n ;-) Otherwise, I could not find any other flaws in the approach and it makes sense, so: Reviewed-by: Joel Fernandes Boqun, you will be taking this through the 7.0-rc tree right? So that 7.0 release tests don't fail. Also I will drop the 2 related rcutorture patches for 7.1 and rebase on top of a 7.0-rc fixes branch Boqun might be creating. Thanks! -- Joel Fernandes [...]