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| author | Chuck Lever <chuck.lever@oracle.com> | 2019-07-29 20:22:09 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2019-08-05 18:50:32 +0300 |
| commit | 20cf4e026730104892fa1268de0371a631cee294 (patch) | |
| tree | 08a7e60c303ff468d50a33d52e2bc98eab9b1b30 /net/sunrpc | |
| parent | 31d0e6c149b8c9a9bddc6d68f8600918bb771cb9 (diff) | |
| download | linux-20cf4e026730104892fa1268de0371a631cee294.tar.xz | |
rdma: Enable ib_alloc_cq to spread work over a device's comp_vectors
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 <haakon.bugge@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Cc: <linux-cifs@vger.kernel.org>
Cc: <v9fs-developer@lists.sourceforge.net>
Link: https://lore.kernel.org/r/20190729171923.13428.52555.stgit@manet.1015granger.net
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'net/sunrpc')
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_transport.c | 8 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/verbs.c | 13 |
2 files changed, 10 insertions, 11 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c index 3fe665152d95..4d3db6ee7f09 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_transport.c +++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c @@ -454,14 +454,14 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) dprintk("svcrdma: error creating PD for connect request\n"); goto errout; } - newxprt->sc_sq_cq = ib_alloc_cq(dev, newxprt, newxprt->sc_sq_depth, - 0, IB_POLL_WORKQUEUE); + newxprt->sc_sq_cq = ib_alloc_cq_any(dev, newxprt, newxprt->sc_sq_depth, + IB_POLL_WORKQUEUE); if (IS_ERR(newxprt->sc_sq_cq)) { dprintk("svcrdma: error creating SQ CQ for connect request\n"); goto errout; } - newxprt->sc_rq_cq = ib_alloc_cq(dev, newxprt, rq_depth, - 0, IB_POLL_WORKQUEUE); + newxprt->sc_rq_cq = + ib_alloc_cq_any(dev, newxprt, rq_depth, IB_POLL_WORKQUEUE); if (IS_ERR(newxprt->sc_rq_cq)) { dprintk("svcrdma: error creating RQ CQ for connect request\n"); goto errout; diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index 805b1f35e1ca..b10aa16557f0 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -521,18 +521,17 @@ int rpcrdma_ep_create(struct rpcrdma_xprt *r_xprt) init_waitqueue_head(&ep->rep_connect_wait); ep->rep_receive_count = 0; - sendcq = ib_alloc_cq(ia->ri_id->device, NULL, - ep->rep_attr.cap.max_send_wr + 1, - ia->ri_id->device->num_comp_vectors > 1 ? 1 : 0, - IB_POLL_WORKQUEUE); + sendcq = ib_alloc_cq_any(ia->ri_id->device, NULL, + ep->rep_attr.cap.max_send_wr + 1, + IB_POLL_WORKQUEUE); if (IS_ERR(sendcq)) { rc = PTR_ERR(sendcq); goto out1; } - recvcq = ib_alloc_cq(ia->ri_id->device, NULL, - ep->rep_attr.cap.max_recv_wr + 1, - 0, IB_POLL_WORKQUEUE); + recvcq = ib_alloc_cq_any(ia->ri_id->device, NULL, + ep->rep_attr.cap.max_recv_wr + 1, + IB_POLL_WORKQUEUE); if (IS_ERR(recvcq)) { rc = PTR_ERR(recvcq); goto out2; |