Commit df1885a7 authored by Jack Wang's avatar Jack Wang Committed by Jason Gunthorpe
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RDMA/rtrs_clt: Alloc less memory with write path fast memory registration 

With write path fast memory registration, we need less memory for
each request.

With fast memory registration, we can reduce max_send_sge to save
memory usage.

Also convert the kmalloc_array to kcalloc.

Link: https://lore.kernel.org/r/20210621055340.11789-4-jinpu.wang@ionos.com


Signed-off-by: default avatarJack Wang <jinpu.wang@cloud.ionos.com>
Reviewed-by: default avatarMd Haris Iqbal <haris.iqbal@cloud.ionos.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@nvidia.com>
parent 2ece9ec6

drivers/infiniband/ulp/rtrs/rtrs-clt.c

+2 −3
Original line number Diff line number Diff line
@@ -1372,8 +1372,7 @@ static int alloc_sess_reqs(struct rtrs_clt_sess *sess) 
		if (!req->iu)

			goto out;



		req->sge = kmalloc_array(clt->max_segments + 1,

					 sizeof(*req->sge), GFP_KERNEL);

		req->sge = kcalloc(2, sizeof(*req->sge), GFP_KERNEL);

		if (!req->sge)

			goto out;
@@ -1675,7 +1674,7 @@ static int create_con_cq_qp(struct rtrs_clt_con *con) 
			      sess->queue_depth * 3 + 1);

		max_recv_wr = min_t(int, wr_limit,

			      sess->queue_depth * 3 + 1);

		max_send_sge = sess->clt->max_segments + 1;

		max_send_sge = 2;

	}

	cq_num = max_send_wr + max_recv_wr;

	/* alloc iu to recv new rkey reply when server reports flags set */