nvmf/rdma: Add batch param to config file

Add param WRBatching to config target file (only RDMA).

Signed-off-by: Ivan Betsis <c_ivanb@mellanox.com>
Signed-off-by: Evgeniy Kochetov <evgeniik@mellanox.com>
Signed-off-by: Alexey Marchuk <alexeymar@mellanox.com>
Signed-off-by: Sasha Kotchubievsky <sashakot@mellanox.com>

CHANGELOG.md

@@ -10,6 +10,8 @@ Add optional 'no_wr_batching' parameter to 'nvmf_create_transport' RPC method.
 
 Add 'no_wr_batching' parameter in 'spdk_nvmf_transport_opts' for the ability disable WR batching RDMA. 
 
+Add NoWRBatching option in [Transport] section, this can be used for disable RDMA WR batching.
+
 ### vmd
 A new function, `spdk_vmd_fini`, has been added. It releases all resources acquired by the VMD
 library through the `spdk_vmd_init` call.

etc/spdk/nvmf.conf.in

@@ -111,6 +111,9 @@
   # Set the maximum number outstanding I/O per shared receive queue. Relevant only for RDMA transport
   #MaxSRQDepth 4096
 
+  # Disable batching for RDMA requests
+  #NoWRBatching False
+
 [Transport]
   # Set TCP transport type.
   Type TCP

module/event/subsystems/nvmf/conf.c

@@ -642,6 +642,8 @@ spdk_nvmf_parse_transport(struct spdk_nvmf_parse_transport_ctx *ctx)
 		}
 		bval = spdk_conf_section_get_boolval(ctx->sp, "NoSRQ", false);
 		opts.no_srq = bval;
+		bval = spdk_conf_section_get_boolval(ctx->sp, "NoWRBatching", false);
+		opts.no_wr_batching = bval;
 	}
 
 	if (trtype == SPDK_NVME_TRANSPORT_TCP) {