On Fri, Jul 24, 2020 at 1:36 PM David Howells <dhowells@xxxxxxxxxx> wrote: > > Ian Kent <raven@xxxxxxxxxx> wrote: > > > I was wondering about id re-use. > > > > Assuming that ids that are returned to the idr db are re-used > > what would the chance that a recently used id would end up > > being used? > > > > Would that chance increase as ids are consumed and freed over > > time? > > I've added something to deal with that in the fsinfo branch. I've given each > mount object and superblock a supplementary 64-bit unique ID that's not likely > to repeat before we're no longer around to have to worry about it. > > fsinfo() then allows you to retrieve them by path or by mount ID. Shouldn't the notification interface provide the unique ID? Thanks, Miklos > > So, yes, mnt_id and s_dev are not unique and may be reused very quickly, but > I'm also providing uniquifiers that you can check. > > David >
