On Tue, Aug 25, 2020 at 07:54:58AM -0700, Darrick J. Wong wrote: > > + XFS_SB_VERSION2_FTYPE | \ > > + XFS_SB_VERSION2_NEW_IUNLINK) > > NAK on this part; as I said earlier, don't add things to V4 filesystems. > > If the rest of you have compelling reasons to want V4 support, now is > the time to speak up. I think that it because the series uses the longer unhashed chains unconditionally. And given that old kernels can't deal with that at all I suspect that needs to be changed and support the old buckets for old file systems. And once that is done I don't think we should enable the long single chain without the log item anyway, and remove another possibly combination of flags.