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nvmf/rdma: Match queue depth math to Linux kernel initiator

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Change-Id: Iffe8c35ae76f5541aa95480f1aaaf654fcdfeffd
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
This commit is contained in:
Ben Walker 2017-03-13 15:29:28 -07:00
parent 75990199ae
commit 8fefa7e9ee
1 changed files with 9 additions and 3 deletions
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12
lib/nvmf/rdma.c
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@ -257,7 +257,9 @@ spdk_nvmf_rdma_conn_create(struct rdma_cm_id *id, struct ibv_comp_channel *chann
TAILQ_INIT(&rdma_conn->pending_data_buf_queue);
TAILQ_INIT(&rdma_conn->pending_rdma_rw_queue);
rdma_conn->cq = ibv_create_cq(id->verbs, max_queue_depth * 2, rdma_conn, channel, 0);
/* NOTE: Add one to this value to match the math in the Linux kernel initiator.
* We do not currently understand why they have added one to this value. */
rdma_conn->cq = ibv_create_cq(id->verbs, (max_queue_depth + 1) * 2, rdma_conn, channel, 0);
if (!rdma_conn->cq) {
SPDK_ERRLOG("Unable to create completion queue\n");
SPDK_ERRLOG("Completion Channel: %p Id: %p Verbs: %p\n", channel, id, id->verbs);
@ -271,8 +273,12 @@ spdk_nvmf_rdma_conn_create(struct rdma_cm_id *id, struct ibv_comp_channel *chann
attr.qp_type = IBV_QPT_RC;
attr.send_cq = rdma_conn->cq;
attr.recv_cq = rdma_conn->cq;
attr.cap.max_send_wr = max_queue_depth; /* SEND, READ, and WRITE operations */
attr.cap.max_recv_wr = max_queue_depth; /* RECV operations */
/* NOTE: The next two values have 1 added to them to match the math in the
* Linux kernel initiator. We currently do not understand why they have
* added one to these values and will continue to investigate.
*/
attr.cap.max_send_wr = max_queue_depth + 1; /* SEND, READ, and WRITE operations */
attr.cap.max_recv_wr = max_queue_depth + 1; /* RECV operations */
attr.cap.max_send_sge = NVMF_DEFAULT_TX_SGE;
attr.cap.max_recv_sge = NVMF_DEFAULT_RX_SGE;