Actually I see that this is cxgb3 based on your log information.
Try setting num_sge to 0.
Steve Wise wrote:
Is this with the Chelsio RNIC?
Philip Frey1 wrote:
Hello,
I recently upgraded from OFED 1.3 to 1.4 and the behaviour of an STag
of zero seems to have changed.
Before, the following code worked:
/* create send work request (for synchronization)*/
sge.addr = 0;
sge.length = 0;
sge.lkey = 0;
send_wr.wr_id = tx_wr_id++;
send_wr.next = NULL;
send_wr.sg_list = &sge;
send_wr.num_sge = 1;
send_wr.opcode = IBV_WR_SEND;
send_wr.send_flags = 0;
/* post send synchronization WR */
ret = ibv_post_send(ctx_conn.qp, &send_wr, &bad_wr);
if (ret) {
msg_Err("RDMA: failed to post send");
return -1;
}
but now it results in the following error:
Jan 13 17:34:46 borus kernel: iwch_ev_dispatch - CQE Err qpid 0xa0
opcode 3 status 0x1 type 1 wrid.hi 0x0 wrid.lo 0x80000000
Jan 13 17:34:46 borus kernel: post_qp_event - AE qpid 0xa0 opcode 3
status 0x1 type 1 wrid.hi 0x0 wrid.lo 0x80000000
I wanted to do a zero-length send w/o a memory region to solve the
issue that the MPA initiator must send the first FPDU.
Question1: Why didn't that result in an error before?
Question2: Is there a way of doing a zero-length operation w/o having
to create a MR?
Many thanks for you advice,
Philip
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