IPoIB: Make send and receive queue sizes tunable

Make IPoIB's send and receive queue sizes tunable via module
parameters ("send_queue_size" and "recv_queue_size").  This allows the
queue sizes to be enlarged to fix disastrously bad performance on some
platforms and workloads, without bloating memory usage when large
queues aren't needed.

Signed-off-by: Shirley Ma <xma@us.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_verbs.c b/drivers/infiniband/ulp/ipoib/ipoib_verbs.c
index 5f0388027b25..1d49d1643c59 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_verbs.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_verbs.c
@@ -159,8 +159,8 @@ int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
         struct ipoib_dev_priv *priv = netdev_priv(dev);
         struct ib_qp_init_attr init_attr = {
                 .cap = {
-                        .max_send_wr  = IPOIB_TX_RING_SIZE,
-                        .max_recv_wr  = IPOIB_RX_RING_SIZE,
+                        .max_send_wr  = ipoib_sendq_size,
+                        .max_recv_wr  = ipoib_recvq_size,
                         .max_send_sge = 1,
                         .max_recv_sge = 1
                 },
@@ -175,7 +175,7 @@ int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
         }
 
         priv->cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev,
-                                IPOIB_TX_RING_SIZE + IPOIB_RX_RING_SIZE + 1);
+                                ipoib_sendq_size + ipoib_recvq_size + 1);
         if (IS_ERR(priv->cq)) {
                 printk(KERN_WARNING "%s: failed to create CQ\n", ca->name);
                 goto out_free_pd;