On Thu, Apr 06, 2017 at 05:16:31PM +0000, Marciniszyn, Mike wrote: > > > There were two patches in the patch series, one reworks the rdmavt > > > read side MR to allow for getting rid of an explicit RCU at deref > > > time. The second module parameter was intended to allow for a faster > > > memory registration for user MRs as an option. > > > > If it is faster why wouldn't you always just use that mode? > > It would be faster mr deregistration, but slower data patch since > atomic operations would then be done. Umm.. This doesn't look like a refcount, it is a rwlock - why aren't you using the optimized percpu_rwsem? Seriously, making a rwlock out of a completion and a percpu_refcount and then providing user options to micro-optimize it is fantastically ugly/bad taste. Jason -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
