On 10/04, Peter Zijlstra wrote: > > On Fri, Oct 04, 2013 at 03:31:35PM +0200, Oleg Nesterov wrote: > > > I'm really starting to think we shouldn't do this in rcu_sync at all. > > > > I do not really understand why you insist that rcu_sync() should not > > try to help to the users which need the exclusive mode. > > But what other users; you yourself said that percpu-rwsem isn't one for > long if ever.
Not sure I understand... percpu-rwsem will use exclusive mode, with or without the possible improvements we can copy from cpuhp. sb_writers can probably use it too (along with other helpers from percpu-rwsem we do not have yet). If you mean that the "raw" rcu_sync infrastructure will never have more users, will I am not sure, it looks "natural". But I can not know for sure. OK, I am not going to argue too much, let me send other patches you seem to agree with. I am also going to send this one for the record/review (without __complete_locked), please ack-or-nack it explicitly. I am not trying saying this feature is "must have", of course it is not. The only problem, I am a bit puzzled why you dislike it that much. Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
