On 2019-03-20 16:46:01 [-0700], Paul E. McKenney wrote: > Thank you! I reverted v2 and applied this one with the same sort of > update. Testing is going well thus far aside from my failing to add > the required "=0" after the rcutree.use_softirq. I will probably not > be the only one who will run afoul of this, so I updated the commit log > and the documentation accordingly, as shown below.
perfect, thank you. > Thanx, Paul > > diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h > index f46b4af96ab9..b807204ffd83 100644 > --- a/kernel/rcu/tree_plugin.h > +++ b/kernel/rcu/tree_plugin.h > @@ -629,7 +609,10 @@ static void rcu_read_unlock_special(struct task_struct > *t) > /* Need to defer quiescent state until everything is enabled. */ > if (irqs_were_disabled) { > /* Enabling irqs does not reschedule, so... */ > - raise_softirq_irqoff(RCU_SOFTIRQ); > + if (!use_softirq) that exclamation mark needs to go :/ > + raise_softirq_irqoff(RCU_SOFTIRQ); > + else > + invoke_rcu_core(); > } else { > /* Enabling BH or preempt does reschedule, so... */ > set_tsk_need_resched(current); Sebastian