On Tue, Mar 10, 2020 at 11:44 PM Christoph Hellwig <hch@xxxxxx> wrote: > > On Wed, Mar 11, 2020 at 05:39:42PM +1100, Dave Chinner wrote: > > IOWs, the dax_associate_page() related functionality probably needs > > to be a filesystem callout - part of the aops vector, I think, so > > that device dax can still use it. That way XFS can go it's own way, > > while ext4 and device dax can continue to use the existing mechanism > > mechanisn that is currently implemented.... > > s/XFS/XFS with rmap/, as most XFS file systems currently don't have > that enabled we'll also need to keep the legacy path around. Agree, it needs to be an opt-in capability as ext4 and xfs w/o rmap will stay on the legacy path for the foreseeable future.
