[PATCH v4 14/16] xprtrdma: Count RDMA_NOMSG type calls

[Chuck Lever]

RDMA_NOMSG type calls are less efficient than RDMA_MSG. Count NOMSG
calls so administrators can tell if they happen to be used more than
expected.

Signed-off-by: Chuck Lever <chuck.le...@oracle.com>
Tested-by: Devesh Sharma <devesh.sha...@avagotech.com>
---
 net/sunrpc/xprtrdma/rpc_rdma.c  |    1 +
 net/sunrpc/xprtrdma/transport.c |    5 +++--
 net/sunrpc/xprtrdma/xprt_rdma.h |    1 +
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index 2721586..bc8bd65 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -489,6 +489,7 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst)
        } else if (rqst->rq_snd_buf.flags & XDRBUF_WRITE) {
                rtype = rpcrdma_readch;
        } else {
+               r_xprt->rx_stats.nomsg_call_count++;
                headerp->rm_type = htonl(RDMA_NOMSG);
                rtype = rpcrdma_areadch;
                rpclen = 0;
diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
index 0985b2b..64443eb 100644
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -659,7 +659,7 @@ static void xprt_rdma_print_stats(struct rpc_xprt *xprt, 
struct seq_file *seq)
                   xprt->stat.bad_xids,
                   xprt->stat.req_u,
                   xprt->stat.bklog_u);
-       seq_printf(seq, "%lu %lu %lu %llu %llu %llu %llu %lu %lu %lu\n",
+       seq_printf(seq, "%lu %lu %lu %llu %llu %llu %llu %lu %lu %lu %lu\n",
                   r_xprt->rx_stats.read_chunk_count,
                   r_xprt->rx_stats.write_chunk_count,
                   r_xprt->rx_stats.reply_chunk_count,
@@ -669,7 +669,8 @@ static void xprt_rdma_print_stats(struct rpc_xprt *xprt, 
struct seq_file *seq)
                   r_xprt->rx_stats.fixup_copy_count,
                   r_xprt->rx_stats.hardway_register_count,
                   r_xprt->rx_stats.failed_marshal_count,
-                  r_xprt->rx_stats.bad_reply_count);
+                  r_xprt->rx_stats.bad_reply_count,
+                  r_xprt->rx_stats.nomsg_call_count);
 }
 
 static int
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index 8422c09..d252457 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -340,6 +340,7 @@ struct rpcrdma_stats {
        unsigned long           hardway_register_count;
        unsigned long           failed_marshal_count;
        unsigned long           bad_reply_count;
+       unsigned long           nomsg_call_count;
 };
 
 /*

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