From 61e5edef917ce5e2daa2056bcde64e2e477f1e06 Mon Sep 17 00:00:00 2001
From: Eric Dumazet <edumazet@google.com>
Date: Thu, 23 May 2013 07:44:20 +0000
Subject: [PATCH] --- yaml --- r: 376177 b: refs/heads/master c:
 547669d483e5783d722772af1483fa474da7caf9 h: refs/heads/master i:   376175:
 05548c2c45f14f5f30e8b7fe24366120642dce74 v: v3

---
 [refs]                      |  2 +-
 trunk/net/ipv4/tcp_output.c | 10 ++++++----
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/[refs] b/[refs]
index ca2b6ac4b754..0226e43c4deb 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7a1a0cbfeb31f20acc10722642198e76bbc30cb9
+refs/heads/master: 547669d483e5783d722772af1483fa474da7caf9
diff --git a/trunk/net/ipv4/tcp_output.c b/trunk/net/ipv4/tcp_output.c
index 536d40929ba6..ec335fabd5cc 100644
--- a/trunk/net/ipv4/tcp_output.c
+++ b/trunk/net/ipv4/tcp_output.c
@@ -874,11 +874,13 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it,
 							   &md5);
 	tcp_header_size = tcp_options_size + sizeof(struct tcphdr);
 
-	if (tcp_packets_in_flight(tp) == 0) {
+	if (tcp_packets_in_flight(tp) == 0)
 		tcp_ca_event(sk, CA_EVENT_TX_START);
-		skb->ooo_okay = 1;
-	} else
-		skb->ooo_okay = 0;
+
+	/* if no packet is in qdisc/device queue, then allow XPS to select
+	 * another queue.
+	 */
+	skb->ooo_okay = sk_wmem_alloc_get(sk) == 0;
 
 	skb_push(skb, tcp_header_size);
 	skb_reset_transport_header(skb);