From: Patrick McHardy <kaber@trash.net>
To: Jarek Poplawski <jarkao2@o2.pl>
Cc: devik@cdi.cz, netdev@vger.kernel.org
Subject: Re: [NET_SCHED 06/06]: Fix endless loops (part 4): HTB
Date: Thu, 23 Nov 2006 10:07:32 +0100 [thread overview]
Message-ID: <456564D4.9010302@trash.net> (raw)
In-Reply-To: <20061123090113.GB1586@ff.dom.local>
Jarek Poplawski wrote:
> On Thu, Nov 23, 2006 at 09:44:04AM +0100, Patrick McHardy wrote:
>
>>Jarek Poplawski wrote:
>>
>>>>+static void htb_qlen_notify(struct Qdisc *sch, unsigned long arg)
>>>>+{
>>>>+ struct htb_class *cl = (struct htb_class *)arg;
>>>>+
>>>>+ if (cl->un.leaf.q->q.qlen == 0)
>>>
>>>
>>>Probably "if (cl->prio_activity)" is needed here.
>>
>>
>>No, the function is only called for active leaf classes, which
>>always have prio_activity != 0.
>
>
> So this was unnecessary in htb_graft? You should know better...
In htb_graft it was necessary because the class could be
either active (qlen > 0) or inactive (qlen == 0). But since
qdisc_tree_decrease_qlen does nothing in case of a decrease
of zero the callback is only called for active classes and
the check becomes unnecessary.
next prev parent reply other threads:[~2006-11-23 9:07 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-20 13:08 [NET_SCHED 00/06]: Fix endless dequeue loops Patrick McHardy
2006-11-20 13:08 ` [NET_SCHED 01/06]: sch_htb: perform qlen adjustment immediately in ->delete Patrick McHardy
2006-11-30 1:35 ` David Miller
2006-11-20 13:08 ` [NET_SCHED 02/06]: Set parent classid in default qdiscs Patrick McHardy
2006-11-30 1:35 ` David Miller
2006-11-20 13:08 ` [NET_SCHED 03/06]: Fix endless loops caused by inaccurate qlen counters (part 1) Patrick McHardy
2006-11-20 14:23 ` Mika Penttilä
2006-11-20 14:31 ` Patrick McHardy
2006-11-20 14:44 ` Mika Penttilä
2006-11-20 14:51 ` Patrick McHardy
2006-11-20 16:07 ` Mika Penttilä
2006-11-20 16:42 ` Patrick McHardy
2006-11-30 1:35 ` David Miller
2006-11-20 13:08 ` [NET_SCHED 04/06]: Fix endless loops (part 2): "simple" qdiscs Patrick McHardy
2006-11-24 12:33 ` Jarek Poplawski
2006-11-24 13:07 ` Patrick McHardy
2006-11-24 13:37 ` Jarek Poplawski
2006-11-27 6:46 ` Jarek Poplawski
2006-11-30 1:36 ` David Miller
2006-11-20 13:08 ` [NET_SCHED 05/06]: Fix endless loops (part 3): HFSC Patrick McHardy
2006-11-30 1:36 ` David Miller
2006-11-20 13:08 ` [NET_SCHED 06/06]: Fix endless loops (part 4): HTB Patrick McHardy
2006-11-20 13:39 ` Martin Devera
2006-11-23 8:39 ` Jarek Poplawski
2006-11-23 8:44 ` Patrick McHardy
2006-11-23 9:01 ` Jarek Poplawski
2006-11-23 9:07 ` Patrick McHardy [this message]
2006-11-23 9:32 ` Martin Devera
2006-11-23 9:48 ` Patrick McHardy
2006-11-23 10:59 ` Jarek Poplawski
2006-11-30 1:37 ` David Miller
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