netdev - [RFC PATCH net-next 1/6] net/smc: Spread CQs to differents completion vectors

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Date:   Fri, 14 Jan 2022 13:48:47 +0800
From:   Tony Lu <tonylu@...ux.alibaba.com>
To:     kgraul@...ux.ibm.com
Cc:     kuba@...nel.org, davem@...emloft.net, netdev@...r.kernel.org,
        linux-s390@...r.kernel.org
Subject: [RFC PATCH net-next 1/6] net/smc: Spread CQs to differents completion vectors

This spreads recv/send CQs to different vectors. This removes the
limitation of single vector, which binds to some CPU.

Signed-off-by: Tony Lu <tonylu@...ux.alibaba.com>
---
 net/smc/smc_ib.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/smc/smc_ib.c b/net/smc/smc_ib.c
index a3e2d3b89568..d1f337522bd5 100644
--- a/net/smc/smc_ib.c
+++ b/net/smc/smc_ib.c
@@ -823,6 +823,9 @@ long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev)
 		smcibdev->roce_cq_send = NULL;
 		goto out;
 	}
+	/* spread to different completion vector */
+	if (smcibdev->ibdev->num_comp_vectors > 1)
+		cqattr.comp_vector = 1;
 	smcibdev->roce_cq_recv = ib_create_cq(smcibdev->ibdev,
 					      smc_wr_rx_cq_handler, NULL,
 					      smcibdev, &cqattr);
-- 
2.32.0.3.g01195cf9f