On Fri, Aug 24, 2018 at 4:49 PM, Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote: > > >> On Aug 24, 2018, at 2:45 AM, David Howells <dhowells@xxxxxxxxxx> wrote: > >> >> >> The problem is that "exclusivity" isn't necessarily an easy thing to define. >> Take nfs4 and btrfs for example. They creating a backing superblock that the >> actual node is derived from (though in different ways). How do you define >> what "exclusive" means in their case? >> > > I would argue that “exclusive” means “semantically equivalent to getting a fully independent instance.” The only way to get semantically equivalent instance is to create a fully independent instance. See reconfigure (nee remount). Thanks, Miklos