Commit 8fefa7e9 authored by Ben Walker's avatar Ben Walker
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nvmf/rdma: Match queue depth math to Linux kernel initiator 



Change-Id: Iffe8c35ae76f5541aa95480f1aaaf654fcdfeffd
Signed-off-by: default avatarBen Walker <benjamin.walker@intel.com>
parent 75990199

lib/nvmf/rdma.c

+9 −3
Original line number Diff line number Diff line
@@ -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;