On Thu, Jan 20, 2022 at 06:22:00PM -0800, Darrick J. Wong wrote: > Hm, so that means XFS can only support dax+pmem when there aren't > partitions in use? Ew. Yes. Or any sensible DAX usage going forward for that matter. > > > > (2) extent the holder mechanism to cover a rangeo > > I don't think I was around for the part where "hch balked at a notifier > call chain" -- what were the objections there, specifically? I would > hope that pmem problems would be infrequent enough that the locking > contention (or rcu expiration) wouldn't be an issue...? notifiers are a nightmare untype API leading to tons of boilerplate code. Open coding the notification is almost always a better idea.
