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authorVinicius Costa Gomes <vinicius.gomes@intel.com>2019-10-14 22:38:22 +0200
committerDavid S. Miller <davem@davemloft.net>2019-10-16 05:32:04 +0200
commit28aa7c86c2b49f659c8460a89e53b506c45979bb (patch)
treeed91b53474128aef1288f49dda4a4ce8bf7e249a /net
parentnet: avoid potential infinite loop in tc_ctl_action() (diff)
downloadlinux-28aa7c86c2b49f659c8460a89e53b506c45979bb.tar.xz
linux-28aa7c86c2b49f659c8460a89e53b506c45979bb.zip
sched: etf: Fix ordering of packets with same txtime
When a application sends many packets with the same txtime, they may be transmitted out of order (different from the order in which they were enqueued). This happens because when inserting elements into the tree, when the txtime of two packets are the same, the new packet is inserted at the left side of the tree, causing the reordering. The only effect of this change should be that packets with the same txtime will be transmitted in the order they are enqueued. The application in question (the AVTP GStreamer plugin, still in development) is sending video traffic, in which each video frame have a single presentation time, the problem is that when packetizing, multiple packets end up with the same txtime. The receiving side was rejecting packets because they were being received out of order. Fixes: 25db26a91364 ("net/sched: Introduce the ETF Qdisc") Reported-by: Ederson de Souza <ederson.desouza@intel.com> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sched/sch_etf.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sched/sch_etf.c b/net/sched/sch_etf.c
index cebfb65d8556..b1da5589a0c6 100644
--- a/net/sched/sch_etf.c
+++ b/net/sched/sch_etf.c
@@ -177,7 +177,7 @@ static int etf_enqueue_timesortedlist(struct sk_buff *nskb, struct Qdisc *sch,
parent = *p;
skb = rb_to_skb(parent);
- if (ktime_after(txtime, skb->tstamp)) {
+ if (ktime_compare(txtime, skb->tstamp) >= 0) {
p = &parent->rb_right;
leftmost = false;
} else {