Le Wed, Oct 02, 2024 at 04:57:38PM +0200, Frederic Weisbecker a écrit : > Callbacks enqueued after rcutree_report_cpu_dead() fall into RCU barrier > blind spot. Report any potential misuse. > > Reported-by: Paul E. McKenney <paul...@kernel.org> > Signed-off-by: Frederic Weisbecker <frede...@kernel.org> > --- > kernel/rcu/tree.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c > index a60616e69b66..36070b6bf4a1 100644 > --- a/kernel/rcu/tree.c > +++ b/kernel/rcu/tree.c > @@ -3084,8 +3084,11 @@ __call_rcu_common(struct rcu_head *head, > rcu_callback_t func, bool lazy_in) > head->func = func; > head->next = NULL; > kasan_record_aux_stack_noalloc(head); > + > local_irq_save(flags); > rdp = this_cpu_ptr(&rcu_data); > + RCU_LOCKDEP_WARN(rcu_rdp_cpu_online(rdp), "Callback enqueued on offline > CPU!");
This should be !rcu_rdp_cpu_online(rdp) Sigh... > + > lazy = lazy_in && !rcu_async_should_hurry(); > > /* Add the callback to our list. */ > -- > 2.46.0 > >
