[PATCH v1] svcrdma: Increase the server's default RPC/RDMA credit grant

[Chuck Lever <cel@kernel.org>]

From: Chuck Lever <chuck.lever@oracle.com>

Now that the nfsd thread count can scale to more threads, permit
individual clients to make more use of those threads. Increase the
RPC/RDMA per-connection credit grant from 64 to 128 -- same as the
Linux NFS client.

Simple single client fio-based benchmarking so far shows only
improvement, no regression.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 include/linux/sunrpc/svc_rdma.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h
index 22704c2e5b9b..57f4fd94166a 100644
--- a/include/linux/sunrpc/svc_rdma.h
+++ b/include/linux/sunrpc/svc_rdma.h
@@ -131,7 +131,7 @@ static inline struct svcxprt_rdma *svc_rdma_rqst_rdma(struct svc_rqst *rqstp)
  */
 enum {
 	RPCRDMA_LISTEN_BACKLOG	= 10,
-	RPCRDMA_MAX_REQUESTS	= 64,
+	RPCRDMA_MAX_REQUESTS	= 128,
 	RPCRDMA_MAX_BC_REQUESTS	= 2,
 };
 
-- 
2.51.0