On Thu, May 22, 2025 at 08:52:19AM -0700, Bart Van Assche wrote: > Before any copy offloading code is merged in the upstream kernel, a plan > should be presented for how this partial implementation will evolve into > a generic solution. As Hannes already pointed out, support for > copying between block devices is missing. SCSI support is missing. > Device mapper support is missing. What is the plan for evolving this > patch series into a generic solution? Is it even possible to evolve this > patch series into a generic solution? While I agree with some of this, please keep cross-device copies out of the picture here. The cross-namepace copies and cross LUN copies in SCSI are a horrible misfeature that is almost impossible to implement in an I/O stack. If someone ever manages to get them to work they most certainly would have to use a very different infrastructure outside the block layer.
