diff options
| -rw-r--r-- | net/sched/sch_netem.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c index 4ac6df0..7e9e658 100644 --- a/net/sched/sch_netem.c +++ b/net/sched/sch_netem.c @@ -479,22 +479,28 @@ static int netem_change(struct Qdisc *sch, struct rtattr *opt) */ struct fifo_sched_data { u32 limit; + psched_time_t oldest; }; static int tfifo_enqueue(struct sk_buff *nskb, struct Qdisc *sch) { struct fifo_sched_data *q = qdisc_priv(sch); struct sk_buff_head *list = &sch->q; - const struct netem_skb_cb *ncb - = (const struct netem_skb_cb *)nskb->cb; + psched_time_t tnext = ((struct netem_skb_cb *)nskb->cb)->time_to_send; struct sk_buff *skb; if (likely(skb_queue_len(list) < q->limit)) { + /* Optimize for add at tail */ + if (likely(skb_queue_empty(list) || !PSCHED_TLESS(tnext, q->oldest))) { + q->oldest = tnext; + return qdisc_enqueue_tail(nskb, sch); + } + skb_queue_reverse_walk(list, skb) { const struct netem_skb_cb *cb = (const struct netem_skb_cb *)skb->cb; - if (!PSCHED_TLESS(ncb->time_to_send, cb->time_to_send)) + if (!PSCHED_TLESS(tnext, cb->time_to_send)) break; } @@ -507,7 +513,7 @@ static int tfifo_enqueue(struct sk_buff *nskb, struct Qdisc *sch) return NET_XMIT_SUCCESS; } - return qdisc_drop(nskb, sch); + return qdisc_reshape_fail(nskb, sch); } static int tfifo_init(struct Qdisc *sch, struct rtattr *opt) @@ -523,6 +529,7 @@ static int tfifo_init(struct Qdisc *sch, struct rtattr *opt) } else q->limit = max_t(u32, sch->dev->tx_queue_len, 1); + PSCHED_SET_PASTPERFECT(q->oldest); return 0; } |