pkt_sched: fq: remove useless TIME_WAIT check

TIME_WAIT sockets are not owning any skb.

ip_send_unicast_reply() and tcp_v6_send_response() both use
regular sockets.

We can safely remove a test in sch_fq and save one cache line miss,
as sk_state is far away from sk_pacing_rate.

Tested at Google for about one year.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/sch_fq.c b/net/sched/sch_fq.c
index 9b05924..2a50f5c 100644 (file)
--- a/net/sched/sch_fq.c
+++ b/net/sched/sch_fq.c
@@ -1,7 +1,7 @@
 /*
  * net/sched/sch_fq.c Fair Queue Packet Scheduler (per flow pacing)
  *
- *  Copyright (C) 2013 Eric Dumazet <edumazet@google.com>
+ *  Copyright (C) 2013-2015 Eric Dumazet <edumazet@google.com>
  *
  *     This program is free software; you can redistribute it and/or
  *     modify it under the terms of the GNU General Public License
@@ -471,7 +471,7 @@ begin:
                goto out;
 
        rate = q->flow_max_rate;
-       if (skb->sk && skb->sk->sk_state != TCP_TIME_WAIT)
+       if (skb->sk)
                rate = min(skb->sk->sk_pacing_rate, rate);
 
        if (rate != ~0U) {