From 20cf4e026730104892fa1268de0371a631cee294 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Mon, 29 Jul 2019 13:22:09 -0400 Subject: rdma: Enable ib_alloc_cq to spread work over a device's comp_vectors MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Send and Receive completion is handled on a single CPU selected at the time each Completion Queue is allocated. Typically this is when an initiator instantiates an RDMA transport, or when a target accepts an RDMA connection. Some ULPs cannot open a connection per CPU to spread completion workload across available CPUs and MSI vectors. For such ULPs, provide an API that allows the RDMA core to select a completion vector based on the device's complement of available comp_vecs. ULPs that invoke ib_alloc_cq() with only comp_vector 0 are converted to use the new API so that their completion workloads interfere less with each other. Suggested-by: Håkon Bugge Signed-off-by: Chuck Lever Reviewed-by: Leon Romanovsky Cc: Cc: Link: https://lore.kernel.org/r/20190729171923.13428.52555.stgit@manet.1015granger.net Signed-off-by: Doug Ledford --- fs/cifs/smbdirect.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'fs/cifs/smbdirect.c') diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c index cd07e5301d42..3c91fa97c9a8 100644 --- a/fs/cifs/smbdirect.c +++ b/fs/cifs/smbdirect.c @@ -1654,15 +1654,17 @@ static struct smbd_connection *_smbd_get_connection( info->send_cq = NULL; info->recv_cq = NULL; - info->send_cq = ib_alloc_cq(info->id->device, info, - info->send_credit_target, 0, IB_POLL_SOFTIRQ); + info->send_cq = + ib_alloc_cq_any(info->id->device, info, + info->send_credit_target, IB_POLL_SOFTIRQ); if (IS_ERR(info->send_cq)) { info->send_cq = NULL; goto alloc_cq_failed; } - info->recv_cq = ib_alloc_cq(info->id->device, info, - info->receive_credit_max, 0, IB_POLL_SOFTIRQ); + info->recv_cq = + ib_alloc_cq_any(info->id->device, info, + info->receive_credit_max, IB_POLL_SOFTIRQ); if (IS_ERR(info->recv_cq)) { info->recv_cq = NULL; goto alloc_cq_failed; -- cgit v1.2.3-59-g8ed1b