netdev - Re: [PATCH] CHOKe flow scheduler (0.8)

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Message-ID: <4D3055C2.3060807@trash.net>
Date:	Fri, 14 Jan 2011 14:55:14 +0100
From:	Patrick McHardy <kaber@...sh.net>
To:	Stephen Hemminger <shemminger@...tta.com>
CC:	Eric Dumazet <eric.dumazet@...il.com>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH] CHOKe flow scheduler (0.8)

On 14.01.2011 14:54, Patrick McHardy wrote:
> On 14.01.2011 00:34, Stephen Hemminger wrote:
>> +static int choke_enqueue(struct sk_buff *skb, struct Qdisc *sch)
>> +{
>> ...
>> +	/* Is queue small? */
>> +	if (p->qavg <= p->qth_min)
>> +		p->qcount = -1;
>> +	else {
>> +		struct sk_buff *oskb;
>> +		unsigned int idx;
>> +
>> +		/* Draw a packet at random from queue */
>> +		oskb = choke_peek_random(sch, &idx);
>> +
>> +		/* Both packets from same flow ? */
>> +		if (*(unsigned int *)(qdisc_skb_cb(oskb)->data) == hash) {
>> +			/* Drop both packets */
>> +			q->stats.matched++;
>> +			choke_drop_by_idx(q, idx);
>> +			sch->qstats.backlog -= qdisc_pkt_len(skb);
>> +			--sch->q.qlen;
>> +			qdisc_drop(oskb, sch);
> 
> You need to adjust the qlen values of parent qdiscs by calling
> qdisc_tree_decrease_qlen(), they are not aware that a second
> packet has been dropped.

I just saw that Eric already fixed this :)
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