[PATCHv10 0/9] write hints with nvme fdp, scsi streams

[Martin K. Petersen]

Bart,

> Does "cookie" refer to the SCSI ROD token? Storing the ROD token in
> the REQ_OP_COPY_DST bio implies that the REQ_OP_COPY_DST bio is only
> submitted after the REQ_OP_COPY_SRC bio has completed.

Obviously. You can't issue a WRITE USING TOKEN until you have the token.

> NVMe users may prefer that REQ_OP_COPY_SRC and REQ_OP_COPY_DST bios
> are submitted simultaneously.

What would be the benefit of submitting these operations concurrently?
As I have explained, it adds substantial complexity and object lifetime
issues throughout the stack. To what end?

-- 
Martin K. Petersen	Oracle Linux Engineering