On Tue, Apr 16, 2024 at 11:24:27PM +0000, linux-xfs.ykg@xxxxxxxxxx wrote: > Greetings, > > I was attempting to use mkfs.xfs on Linux Mint 21 (kernel 6.5.0, xfsprogs > 5.13.0) and ran into an error trying to use realtime and reflink features on > the same filesystem. Is there anything I'm doing wrong, or is this > combination simply not supported on the same filesystem? > > The exact command I ran was: > mkfs.xfs -N -r rtdev=/dev/sda1,extsize=1048576 -m reflink=1 /dev/sda2 > > Which returned with: > reflink not supported with realtime devices > > Just to be clear - I didn't expect to be able to use reflinking on realtime > files (*), but I did expect to be able to have realtime files and reflinked > non-realtime files supported on the same filesystem. With my limited > knowledge of the inner workings of XFS, those two features _seem_ like they > could both work together as long as they are used on different inodes. Is > this not the case? It's not supported, currently. Patches have been out for review since 2020 but have not moved forward due to prioritization and backlog issues. Sorry about that. :( https://lore.kernel.org/linux-xfs/160945477567.2833676.4112646582104319587.stgit@magnolia/ --D > Thanks, > Reed Wilson > > > > (*) I noticed that there were recent commits for reflinking realtime files, > but that's not really what I was looking for > >
