svcrdma: Allocate new transports on device's NUMA node

The physical device's NUMA node ID is available when allocating an
svc_xprt for an incoming connection. Use that value to ensure the
svc_xprt structure is allocated on the NUMA node closest to the
device.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

net/sunrpc/xprtrdma/svc_rdma_transport.c

@@ -64,7 +64,7 @@
 #define RPCDBG_FACILITY	RPCDBG_SVCXPRT
 
 static struct svcxprt_rdma *svc_rdma_create_xprt(struct svc_serv *serv,
-						 struct net *net);
+						 struct net *net, int node);
 static struct svc_xprt *svc_rdma_create(struct svc_serv *serv,
 					struct net *net,
 					struct sockaddr *sa, int salen,
@@ -123,14 +123,14 @@ static void qp_event_handler(struct ib_event *event, void *context)
 }
 
 static struct svcxprt_rdma *svc_rdma_create_xprt(struct svc_serv *serv,
-						 struct net *net)
+						 struct net *net, int node)
 {
-	struct svcxprt_rdma *cma_xprt = kzalloc(sizeof *cma_xprt, GFP_KERNEL);
+	struct svcxprt_rdma *cma_xprt;
 
-	if (!cma_xprt) {
-		dprintk("svcrdma: failed to create new transport\n");
+	cma_xprt = kzalloc_node(sizeof(*cma_xprt), GFP_KERNEL, node);
+	if (!cma_xprt)
 		return NULL;
-	}
+
 	svc_xprt_init(net, &svc_rdma_class, &cma_xprt->sc_xprt, serv);
 	INIT_LIST_HEAD(&cma_xprt->sc_accept_q);
 	INIT_LIST_HEAD(&cma_xprt->sc_rq_dto_q);
@@ -193,9 +193,9 @@ static void handle_connect_req(struct rdma_cm_id *new_cma_id,
 	struct svcxprt_rdma *newxprt;
 	struct sockaddr *sa;
 
-	/* Create a new transport */
 	newxprt = svc_rdma_create_xprt(listen_xprt->sc_xprt.xpt_server,
-				       listen_xprt->sc_xprt.xpt_net);
+				       listen_xprt->sc_xprt.xpt_net,
+				       ibdev_to_node(new_cma_id->device));
 	if (!newxprt)
 		return;
 	newxprt->sc_cm_id = new_cma_id;
@@ -304,7 +304,7 @@ static struct svc_xprt *svc_rdma_create(struct svc_serv *serv,
 
 	if (sa->sa_family != AF_INET && sa->sa_family != AF_INET6)
 		return ERR_PTR(-EAFNOSUPPORT);
-	cma_xprt = svc_rdma_create_xprt(serv, net);
+	cma_xprt = svc_rdma_create_xprt(serv, net, NUMA_NO_NODE);
 	if (!cma_xprt)
 		return ERR_PTR(-ENOMEM);
 	set_bit(XPT_LISTENER, &cma_xprt->sc_xprt.xpt_flags);