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| 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 /drivers/infiniband/ulp | |
| parent | 31d0e6c149b8c9a9bddc6d68f8600918bb771cb9 (diff) | |
| download | linux-20cf4e026730104892fa1268de0371a631cee294.tar.bz2 | |
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 'drivers/infiniband/ulp')
| -rw-r--r-- | drivers/infiniband/ulp/srpt/ib_srpt.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c index 1a039f16d315..e25c70a56be6 100644 --- a/drivers/infiniband/ulp/srpt/ib_srpt.c +++ b/drivers/infiniband/ulp/srpt/ib_srpt.c @@ -1767,8 +1767,8 @@ static int srpt_create_ch_ib(struct srpt_rdma_ch *ch) goto out; retry: - ch->cq = ib_alloc_cq(sdev->device, ch, ch->rq_size + sq_size, - 0 /* XXX: spread CQs */, IB_POLL_WORKQUEUE); + ch->cq = ib_alloc_cq_any(sdev->device, ch, ch->rq_size + sq_size, + IB_POLL_WORKQUEUE); if (IS_ERR(ch->cq)) { ret = PTR_ERR(ch->cq); pr_err("failed to create CQ cqe= %d ret= %d\n", |