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nvme-rdma: Use unlikely macro in the fast path

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This patch slightly improves performance (mainly for small block sizes).

Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Max Gurtovoy 2017-08-14 15:29:26 +03:00 committed by Sagi Grimberg
parent 17c39d053a
commit a7b7c7a105
1 changed files with 6 additions and 6 deletions
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12
drivers/nvme/host/rdma.c
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@ -1047,7 +1047,7 @@ static void nvme_rdma_unmap_data(struct nvme_rdma_queue *queue,
if (req->mr->need_inval) {
res = nvme_rdma_inv_rkey(queue, req);
if (res < 0) {
if (unlikely(res < 0)) {
dev_err(ctrl->ctrl.device,
"Queueing INV WR for rkey %#x failed (%d)\n",
req->mr->rkey, res);
@ -1112,7 +1112,7 @@ static int nvme_rdma_map_sg_fr(struct nvme_rdma_queue *queue,
int nr;
nr = ib_map_mr_sg(req->mr, req->sg_table.sgl, count, NULL, PAGE_SIZE);
if (nr < count) {
if (unlikely(nr < count)) {
if (nr < 0)
return nr;
return -EINVAL;
@ -1248,7 +1248,7 @@ static int nvme_rdma_post_send(struct nvme_rdma_queue *queue,
first = &wr;
ret = ib_post_send(queue->qp, first, &bad_wr);
if (ret) {
if (unlikely(ret)) {
dev_err(queue->ctrl->ctrl.device,
"%s failed with error code %d\n", __func__, ret);
}
@ -1274,7 +1274,7 @@ static int nvme_rdma_post_recv(struct nvme_rdma_queue *queue,
wr.num_sge = 1;
ret = ib_post_recv(queue->qp, &wr, &bad_wr);
if (ret) {
if (unlikely(ret)) {
dev_err(queue->ctrl->ctrl.device,
"%s failed with error code %d\n", __func__, ret);
}
@ -1634,7 +1634,7 @@ static blk_status_t nvme_rdma_queue_rq(struct blk_mq_hw_ctx *hctx,
blk_mq_start_request(rq);
err = nvme_rdma_map_data(queue, rq, c);
if (err < 0) {
if (unlikely(err < 0)) {
dev_err(queue->ctrl->ctrl.device,
"Failed to map data (%d)\n", err);
nvme_cleanup_cmd(rq);
@ -1648,7 +1648,7 @@ static blk_status_t nvme_rdma_queue_rq(struct blk_mq_hw_ctx *hctx,
flush = true;
err = nvme_rdma_post_send(queue, sqe, req->sge, req->num_sge,
req->mr->need_inval ? &req->reg_wr.wr : NULL, flush);
if (err) {
if (unlikely(err)) {
nvme_rdma_unmap_data(queue, rq);
goto err;
}