On Thu, 14 Aug 2025 at 20:55, Darrick J. Wong <djwong@xxxxxxxxxx> wrote: > Or do we move the backing_files_map out of CONFIG_FUSE_PASSTHROUGH and > then let fuse-iomap/famfs extract the block/dax device from that? > Then the backing_id/device cookie would be the same across a fuse mount. Yes. Thanks, Miklos