Modify IPOIB CM to use a lockless SRQ
IPOIB CM uses NAPI which allows the poll function to be lockless.
This patches modifies IPOIB to utilize this.
Signed-off-by: Eli Cohen <[EMAIL PROTECTED]>
---
Index: ofa_kernel-1.2.5/drivers/infiniband/ulp/ipoib/ipoib_cm.c
===================================================================
--- ofa_kernel-1.2.5.orig/drivers/infiniband/ulp/ipoib/ipoib_cm.c
2007-10-10 15:10:30.000000000 +0200
+++ ofa_kernel-1.2.5/drivers/infiniband/ulp/ipoib/ipoib_cm.c 2007-10-10
15:28:52.000000000 +0200
@@ -1292,6 +1292,9 @@ int ipoib_cm_dev_init(struct net_device
.max_sge = IPOIB_CM_RX_SG
}
};
+ struct ib_srq_attr attr = {
+ .use_lock = 0,
+ };
int ret, i;
INIT_LIST_HEAD(&priv->cm.passive_ids);
@@ -1316,6 +1319,12 @@ int ipoib_cm_dev_init(struct net_device
return ret;
}
+ ret = ib_modify_srq(priv->cm.srq, &attr, IB_SRQ_LOCKNESS);
+ if (ret) {
+ ipoib_cm_dev_cleanup(dev);
+ return ret;
+ }
+
priv->cm.srq_ring = kzalloc(ipoib_recvq_size * sizeof
*priv->cm.srq_ring,
GFP_KERNEL);
if (!priv->cm.srq_ring) {
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