rds: Use RCU for the bind lookup searches

The RDS bind lookups are somewhat expensive in terms of CPU
time and locking overhead.  This commit changes them into a
faster RCU based hash tree instead of the rbtrees they were using
before.

On large NUMA systems it is a significant improvement.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/rds/ib_rdma.c b/net/rds/ib_rdma.c
index cc341cd70c87..4ba01b9ffd44 100644
--- a/net/rds/ib_rdma.c
+++ b/net/rds/ib_rdma.c
@@ -303,6 +303,8 @@ static struct rds_ib_mr *rds_ib_alloc_fmr(struct rds_ib_device *rds_ibdev)
                 goto out_no_cigar;
         }
 
+        memset(ibmr, 0, sizeof(*ibmr));
+
         ibmr->fmr = ib_alloc_fmr(rds_ibdev->pd,
                         (IB_ACCESS_LOCAL_WRITE |
                          IB_ACCESS_REMOTE_READ |