netdev - Re: [PATCH] sch_htb.c consume the classes's tokens bellow the HTB_CAN

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Message-ID: <412e6f7f0911030147k659e0079ibd1f424fef0a487f@mail.gmail.com>
Date:	Tue, 3 Nov 2009 17:47:17 +0800
From:	Changli Gao <xiaosuo@...il.com>
To:	Jarek Poplawski <jarkao2@...il.com>
Cc:	Jamal Hadi Salim <hadi@...erus.ca>, devik@....cz,
	netdev@...r.kernel.org
Subject: Re: [PATCH] sch_htb.c consume the classes's tokens bellow the 
	HTB_CAN_SEND level

On Tue, Nov 3, 2009 at 4:00 PM, Jarek Poplawski <jarkao2@...il.com> wrote:
>
>> It means that a class, which sends packets
>> in ceil rate, can also enter HTB_CAN_SEND state now and then.
>
> Yes, a class is entitled to send on it's own then with it's guaranteed
> rate, without depending on borrowing.

I don't think so. The class should _NOT_ enter HTB_CAN_SEND mode when
its data rate is higher than its rate specification. In other word, a
class should enter HTB_CAN_SEND mode only when its data rate isn't
higher than its rate specification. Otherwise, it will get additional
tokens and reach a higher data rate than its ceil specification. This
may affect other classes.


-- 
Regards，
Changli Gao(xiaosuo@...il.com)
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