From 0150a00d829e866931775d9503969402d2274251 Mon Sep 17 00:00:00 2001 From: Kunwu Chan Date: Fri, 11 Sep 2026 12:02:51 +0800 Subject: [PATCH] srcutree: Skip torture to-big transition for atomic SRCU Atomic SRCU does not use the srcu_node combining tree. Exclude it from the SRCU_SIZING_IS_TORTURE() transition in srcu_torture_stats_print(), and warn if such a transition is requested. Signed-off-by: Kunwu Chan Signed-off-by: Paul E. McKenney --- kernel/rcu/srcutree.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/kernel/rcu/srcutree.c b/kernel/rcu/srcutree.c index 6a05bd8a6f39..6e37d53b412e 100644 --- a/kernel/rcu/srcutree.c +++ b/kernel/rcu/srcutree.c @@ -2422,8 +2422,10 @@ void srcu_torture_stats_print(struct srcu_struct *ssp, char *tt, char *tf) } pr_cont(" T(%ld,%ld)\n", s0, s1); } - if (SRCU_SIZING_IS_TORTURE()) - srcu_transition_to_big(ssp); + if (SRCU_SIZING_IS_TORTURE()) { + if (!WARN_ON_ONCE(ssp->srcu_reader_flavor == SRCU_READ_FLAVOR_ATOMIC)) + srcu_transition_to_big(ssp); + } } EXPORT_SYMBOL_GPL(srcu_torture_stats_print);