Hi,
since for iWARP, that after the MPA connection establishment, the
MPA initiator must send the first FPDU, I wanted to do that using a
0-length
RDMA Read. When using the T3 Chelsio RNIC, I end up with a segmentation
fault from the libcxgb3 (function t3b_post_send).
I was trying to post a 0-lenght WR for RDMA Read like this:
struct ibv_send_wr wr;
wr.wr_id = 1;
wr.next = NULL;
wr.sg_list = NULL;
wr.num_sge = 0;
wr.wr.rdma.remote_addr = 0;
wr.wr.rdma.rkey = 0;
wr.opcode = IBV_WR_RDMA_READ;
wr.send_flags = IBV_SEND_SIGNALED;
ibv_post_send(qp, &wr, &bad_wr);
Question1: Are 0-length RDMA Reads supported at all by the T3?
Question2: If they are, how do I have to write a correct send WR?
Many thanks for your advice,
Philip
--
Philip Frey
IBM Zurich Research Laboratory
Saumerstrasse 4 | Phone: +41 44 724
8613
CH-8803 Rueschlikon/Switzerland | Email: [email protected]
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