Commit f096ba32 authored by Max Gurtovoy's avatar Max Gurtovoy Committed by Keith Busch
Browse files

nvmet-rdma: set max_queue_size for RDMA transport 



A new port configuration was added to set max_queue_size. Clamp user
configuration to RDMA transport limits.

Increase the maximal queue size of RDMA controllers from 128 to 256
(the default size stays 128 same as before).

Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarSagi Grimberg <sagi@grimberg.me>
Reviewed-by: default avatarIsrael Rukshin <israelr@nvidia.com>
Signed-off-by: default avatarMax Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: default avatarKeith Busch <kbusch@kernel.org>
parent ca2b221d

drivers/nvme/target/rdma.c

+8 −0
Original line number Diff line number Diff line
@@ -1956,6 +1956,14 @@ static int nvmet_rdma_add_port(struct nvmet_port *nport) 
		nport->inline_data_size = NVMET_RDMA_MAX_INLINE_DATA_SIZE;

	}



	if (nport->max_queue_size < 0) {

		nport->max_queue_size = NVME_RDMA_DEFAULT_QUEUE_SIZE;

	} else if (nport->max_queue_size > NVME_RDMA_MAX_QUEUE_SIZE) {

		pr_warn("max_queue_size %u is too large, reducing to %u\n",

			nport->max_queue_size, NVME_RDMA_MAX_QUEUE_SIZE);

		nport->max_queue_size = NVME_RDMA_MAX_QUEUE_SIZE;

	}



	ret = inet_pton_with_scope(&init_net, af, nport->disc_addr.traddr,

			nport->disc_addr.trsvcid, &port->addr);

	if (ret) {

include/linux/nvme-rdma.h

+2 −1
Original line number Diff line number Diff line
@@ -8,8 +8,9 @@ 


#define NVME_RDMA_IP_PORT		4420



#define NVME_RDMA_MAX_QUEUE_SIZE 128

#define NVME_RDMA_MAX_QUEUE_SIZE 256

#define NVME_RDMA_MAX_METADATA_QUEUE_SIZE 128

#define NVME_RDMA_DEFAULT_QUEUE_SIZE 128



enum nvme_rdma_cm_fmt {

	NVME_RDMA_CM_FMT_1_0 = 0x0,