Index: linux-2.6.16/net/sunrpc/svcsock.c
===================================================================
--- linux-2.6.16.orig/net/sunrpc/svcsock.c	2008-06-16 15:39:01.774672997 +1000
+++ linux-2.6.16/net/sunrpc/svcsock.c	2008-06-16 15:45:06.203421620 +1000
@@ -1157,13 +1159,13 @@ svc_tcp_recvfrom(struct svc_rqst *rqstp)
 		 * particular pool, which provides an upper bound
 		 * on the number of threads which will access the socket.
 		 *
-		 * rcvbuf just needs to be able to hold a few requests.
-		 * Normally they will be removed from the queue 
-		 * as soon a a complete request arrives.
+		 * rcvbuf needs the same room as sndbuf, to allow
+		 * workloads comprising mostly WRITE calls to flow
+		 * at a reasonable fraction of line speed.
 		 */
 		svc_sock_setbufsize(svsk->sk_sock,
 				    (serv->sv_nrthreads+3) * serv->sv_bufsz,
-				    3 * serv->sv_bufsz);
+				    (serv->sv_nrthreads+3) * serv->sv_bufsz);
 
 	svc_sock_clear_data_ready(svsk);