Eric Dumazet wrote, On 08/30/2009 08:54 AM:

Krishna Kumar a écrit :

quoted

From: Krishna Kumar <redacted>

pfifo_fast_enqueue has this check:
        if (skb_queue_len(list) < qdisc_dev(qdisc)->tx_queue_len) {

which allows each band to enqueue upto tx_queue_len skbs for a
total of 3*tx_queue_len skbs. I am not sure if this was the
intention of limiting in qdisc.

Yes I noticed that and said to myself :
This was to let high priority packets have their own limit,
independent on fact that low priority packets filled their queue.

Good point, but then logically it could be something like:
  if (skb_queue_len(list) < qdisc_dev(qdisc)->tx_queue_len / 3)

Of course, there is a backward compatibility question, plus
an sch_prio consistency question.

Jarek P.