The scatterlist in the nvme target is always allocated by the nvmet
code itself an thus never contains multi-page sg list entries.
I am wondering if it is true.
Not look at other target code yet, however seems it isn't true for loop,
see the following code in nvme_loop_queue_rq():
iod->req.sg = iod->sg_table.sgl;
iod->req.sg_cnt = blk_rq_map_sg(req->q, req, iod->sg_table.sgl);
iod->req.transfer_len = blk_rq_payload_bytes(req);
And it has been triggered by nvme/011 in Yi's test.
Yes, loop is an exception in this case.
