On Tue, Oct 03, 2017 at 06:40:24PM +0000, Bart Van Assche wrote: > On Tue, 2017-10-03 at 22:04 +0800, Ming Lei wrote: > > Block layer need to call this function after holding > > rcu lock in a real hot path, so introduce this helper. > > Since it is allowed to nest rcu_read_lock_sched() calls I don't think > that this patch is necessary. Yeah, I know that, with this patch, we can avoid the nest RCU lock. As I mentioned, it is a real hot path, so maybe better to not introduce the extra RCU read lock/unlock. If you guys doesn't care the little cost, I can remove that. -- Ming
