On Wed, Jun 29, 2022 at 04:08:29PM +0900, Damien Le Moal wrote:

On 6/29/22 15:20, Christoph Hellwig wrote:

quoted

Independent access ranges only matter for file system I/O and are only
valid with a registered gendisk, so move them there.

Would this potentially affect the use of ranges in DM ? E.g. exposing a
dm-linear device targets as ranges. I do not think so but I did not check
the details.

Device mapper only ever does file system I/O.  Passthrough I/O must
be initiated by the actual driver like scsi or nvme.