RDMA/rtrs-srv: Set minimal max_send_wr and max_recv_wr
authorJack Wang <jinpu.wang@cloud.ionos.com>
Mon, 14 Jun 2021 09:03:33 +0000 (11:03 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 14 Jul 2021 14:56:23 +0000 (16:56 +0200)
commitfcd8d6371a469aae96367f82a14870e4beef8b2f
tree78a02a24dc9d304a5c38f6c06c64b86cb323e1c1
parenta9355b201d160aa777d1480911c9ee5c7deeb88b
RDMA/rtrs-srv: Set minimal max_send_wr and max_recv_wr

[ Upstream commit 5e91eabf66c854f16ca2e954e5c68939bc81601e ]

Currently rtrs when create_qp use a coarse numbers (bigger in general),
which leads to hardware create more resources which only waste memory with
no benefits.

For max_send_wr, we don't really need alway max_qp_wr size when creating
qp, reduce it to cq_size.

For max_recv_wr,  cq_size is enough.

With the patch when sess_queue_depth=128, per session (2 paths) memory
consumption reduced from 188 MB to 65MB

When always_invalidate is enabled, we need send more wr, so treat it
special.

Fixes: 9cb837480424e ("RDMA/rtrs: server: main functionality")
Link: https://lore.kernel.org/r/20210614090337.29557-2-jinpu.wang@ionos.com
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Reviewed-by: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/infiniband/ulp/rtrs/rtrs-srv.c