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 /fs/cifs/smbdirect.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 'fs/cifs/smbdirect.c')
| -rw-r--r-- | fs/cifs/smbdirect.c | 10 |
1 files changed, 6 insertions, 4 deletions
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; |