+ if (rdma_rw_use_mr(qp->device, port_num)) {
+ ret = rdma_rw_init_mr_wrs(ctx, qp, port_num, sg, sg_offset,
+ remote_addr, rkey, dir);
At some point I would like the iWARP IO to do no-mr for WRITE/dma_nents
== 1, and WRITE/dma_nents <= max_send_sge for the device. I think this
will help smaller iSER/NVMEF READ IOPs. I'm testing this out now on the
NVMEF code, which is slightly different. If it proves out to better the
performance, I'll post a follow-on patch...
Is this possible given that pd->local_dma_lkey has only local
permissions?
I think he means NVMe / SCSI READ commands, which use RDMA WRITE.
For NVMe / SCSI WRITE commands that use RDMA READ all bets are off
for iWarp, but at least it supports READ W/ INVALIDATE.
I interpreted "no-mr for WRITE/dma_nents == 1" as either RDMA_WRITE of
RDMA_READ with a single dma entry (and that part I didn't understand).
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