rds: more FMRs are faster

When we add more FMRs, we flush them less often and so we go faster.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/net/rds/ib.h b/net/rds/ib.h
index 2efd9d1..d2dd23d 100644
--- a/net/rds/ib.h
+++ b/net/rds/ib.h
@@ -9,7 +9,7 @@
 #include "rdma_transport.h"
 
 #define RDS_FMR_SIZE			256
-#define RDS_FMR_POOL_SIZE		4096
+#define RDS_FMR_POOL_SIZE		8192
 
 #define RDS_IB_MAX_SGE			8
 #define RDS_IB_RECV_SGE 		2