Date: Mon, 1 Aug 2016 20:27:11 +0000 (UTC) From: Mark Johnston <markj@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r303635 - head/sys/ofed/drivers/infiniband/core Message-ID: <201608012027.u71KRBl3074013@repo.freebsd.org>
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Author: markj Date: Mon Aug 1 20:27:11 2016 New Revision: 303635 URL: https://svnweb.freebsd.org/changeset/base/303635 Log: MFV 29f27e847: "IB/cma: Use cached gids" This addresses a regression from an earlier upstream change which caused cma_acquire_dev() to bypass the port GID cache and instead query the HCA for each entry in its GID table. These queries can become extremely slow on multiport devices, which has a negative impact on connection setup times. Discussed with: hselasky Obtained from: Linux MFC after: 2 weeks Sponsored by: EMC / Isilon Storage Division Modified: head/sys/ofed/drivers/infiniband/core/cma.c Modified: head/sys/ofed/drivers/infiniband/core/cma.c ============================================================================== --- head/sys/ofed/drivers/infiniband/core/cma.c Mon Aug 1 20:02:59 2016 (r303634) +++ head/sys/ofed/drivers/infiniband/core/cma.c Mon Aug 1 20:27:11 2016 (r303635) @@ -485,7 +485,7 @@ static int cma_acquire_dev(struct rdma_i struct cma_device *cma_dev; union ib_gid gid, iboe_gid; int ret = -ENODEV; - u8 port; + u8 port, found_port; enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ? IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET; @@ -500,21 +500,20 @@ static int cma_acquire_dev(struct rdma_i memcpy(&gid, dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof gid); list_for_each_entry(cma_dev, &dev_list, list) { - for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) { + for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) { if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB && rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET) - ret = find_gid_port(cma_dev->device, &iboe_gid, port); + ret = ib_find_cached_gid(cma_dev->device, &iboe_gid, &found_port, NULL); else - ret = find_gid_port(cma_dev->device, &gid, port); + ret = ib_find_cached_gid(cma_dev->device, &gid, &found_port, NULL); - if (!ret) { + if (!ret && (port == found_port)) { id_priv->id.port_num = port; goto out; } else if (ret == 1) - break; - } - } + break; + } } out:
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