RPC/RDMA: support FRMR client memory registration.

Configure, detect and use "fastreg" support from IB/iWARP verbs
layer to perform RPC/RDMA memory registration.

Make FRMR the default memreg mode (will fall back if not supported
by the selected RDMA adapter).

This allows full and optimal operation over the cxgb3 adapter, and others.

Signed-off-by: Tom Talpey <talpey@netapp.com>
Acked-by: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 1 insertions, 5 deletions

diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
index a564c1a39ec5..89970b0a4cc9 100644
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -70,11 +70,7 @@ static unsigned int xprt_rdma_slot_table_entries = RPCRDMA_DEF_SLOT_TABLE;
 static unsigned int xprt_rdma_max_inline_read = RPCRDMA_DEF_INLINE;
 static unsigned int xprt_rdma_max_inline_write = RPCRDMA_DEF_INLINE;
 static unsigned int xprt_rdma_inline_write_padding;
-#if !RPCRDMA_PERSISTENT_REGISTRATION
-static unsigned int xprt_rdma_memreg_strategy = RPCRDMA_REGISTER; /* FMR? */
-#else
-static unsigned int xprt_rdma_memreg_strategy = RPCRDMA_ALLPHYSICAL;
-#endif
+static unsigned int xprt_rdma_memreg_strategy = RPCRDMA_FRMR;
 
 #ifdef RPC_DEBUG