diff options
| author |   Chuck Lever <chuck.lever@oracle.com> | 2019-07-29 13:22:09 -0400 |
|---|---|---|
| committer |   Doug Ledford <dledford@redhat.com> | 2019-08-05 11:50:32 -0400 |
| commit | 20cf4e026730104892fa1268de0371a631cee294 (patch) | |
| tree | 08a7e60c303ff468d50a33d52e2bc98eab9b1b30 /net/sunrpc/xprtrdma/verbs.c | |
| parent | mlx5: Fix formats with line continuation whitespace (diff) | |
| download | linux-dev-20cf4e026730104892fa1268de0371a631cee294.tar.xz linux-dev-20cf4e026730104892fa1268de0371a631cee294.zip | |
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/xprtrdma/verbs.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/verbs.c | 13 |
1 files changed, 6 insertions, 7 deletions
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; |