From 12406734051a26e9fe4c8568e931dfddbb72d431 Mon Sep 17 00:00:00 2001 From: Ron Livne <ronli@voltaire.com> Date: Mon, 14 Jul 2008 23:48:48 -0700 Subject: IPoIB: Use multicast loopback blocking if available Set IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK for IPoIB's UD QPs if supported by the underlying device. This creates an improvement of up to 39% in bandwidth when sending multicast packets with IPoIB, and an improvment of 12% in cpu usage. Signed-off-by: Ron Livne <ronli@voltaire.com> Signed-off-by: Roland Dreier <rolandd@cisco.com> --- drivers/infiniband/ulp/ipoib/ipoib_verbs.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/ulp/ipoib/ipoib_verbs.c b/drivers/infiniband/ulp/ipoib/ipoib_verbs.c index 810790ae7530..7b8fa36f509b 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_verbs.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_verbs.c @@ -199,7 +199,10 @@ int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca) init_attr.recv_cq = priv->recv_cq; if (priv->hca_caps & IB_DEVICE_UD_TSO) - init_attr.create_flags = IB_QP_CREATE_IPOIB_UD_LSO; + init_attr.create_flags |= IB_QP_CREATE_IPOIB_UD_LSO; + + if (priv->hca_caps & IB_DEVICE_BLOCK_MULTICAST_LOOPBACK) + init_attr.create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK; if (dev->features & NETIF_F_SG) init_attr.cap.max_send_sge = MAX_SKB_FRAGS + 1; -- cgit v1.2.2