On Thu, Oct 14, 2021 at 10:50:00AM -0700, Dan Williams wrote:

The other blocker was enabling mounting dax filesystems on a
dax-device rather than a block device. I'm actively refactoring the
nvdimm subsystem side of that equation, but could use help with the
conversion of the xfs mount path. Christoph, might you have that in
your queue?

It's in my queue.  I'm about to send your a series of prep patches
and plan to tackle the actual mounting next merge window.