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nvmet-rdma: add unlikely check at nvmet_rdma_map_sgl_keyed

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The calls to nvmet_req_alloc_sgl and rdma_rw_ctx_init should usually
succeed, so add this simple optimization to the fast path.

Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Israel Rukshin 2019-10-13 19:57:34 +03:00 committed by Jens Axboe
parent e522f44602
commit 59534b9d60
1 changed files with 2 additions and 2 deletions
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4
drivers/nvme/target/rdma.c
View file

@ -672,13 +672,13 @@ static u16 nvmet_rdma_map_sgl_keyed(struct nvmet_rdma_rsp *rsp,
return 0;
ret = nvmet_req_alloc_sgl(&rsp->req);
if (ret < 0)
if (unlikely(ret < 0))
goto error_out;
ret = rdma_rw_ctx_init(&rsp->rw, cm_id->qp, cm_id->port_num,
rsp->req.sg, rsp->req.sg_cnt, 0, addr, key,
nvmet_data_dir(&rsp->req));
if (ret < 0)
if (unlikely(ret < 0))
goto error_out;
rsp->n_rdma += ret;