On Mon, Apr 25, 2022 at 07:47:23AM +0800, Yanjun Zhu wrote: > 在 2022/4/22 23:57, Pearson, Robert B 写道: > > Use of rcu_read_lock solves this problem. Rcu_read_lock and spinlock on same data can > > Co-exist at the same time. That is the whole point. All this is going away soon. > > This is based on your unproved assumption. No, Bob is right, RCU avoids the need for a BH lock on this XA, the only remaining issue is the AH creation atomic call path. Jason
