On Wed, Jul 15, 2020 at 2:56 PM Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> wrote: > > On 2020-07-15 20:35:37 [+0200], Uladzislau Rezki (Sony) wrote: > > @@ -3306,6 +3307,9 @@ kvfree_call_rcu_add_ptr_to_bulk(struct kfree_rcu_cpu *krcp, void *ptr) > > if (IS_ENABLED(CONFIG_PREEMPT_RT)) > > return false; > > > > + preempt_disable(); > > + krc_this_cpu_unlock(*krcp, *flags); > > Now you enter memory allocator with disabled preemption. This isn't any > better but we don't have a warning for this yet. > What happened to the part where I asked for a spinlock_t? Ulad, Wouldn't the replacing of preempt_disable() with migrate_disable() above resolve Sebastian's issue? Or which scenario breaks? thanks, - Joel > > > + > > /* > > * NOTE: For one argument of kvfree_rcu() we can > > * drop the lock and get the page in sleepable > > Sebastian
