netdev - Re: [PATCH net-next] fq_codel: should use qdisc backlog as threshold

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Message-Id: <20120516.153037.524884393884635968.davem@davemloft.net>
Date:	Wed, 16 May 2012 15:30:37 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org, nichols@...lere.com,
	dave.taht@...ferbloat.net, van@...lere.net,
	codel@...ts.bufferbloat.net, bloat@...ts.bufferbloat.net
Subject: Re: [PATCH net-next] fq_codel: should use qdisc backlog as
 threshold

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Wed, 16 May 2012 16:39:09 +0200

> From: Eric Dumazet <edumazet@...gle.com>
> 
> codel_should_drop() logic allows a packet being not dropped if queue
> size is under max packet size.
> 
> In fq_codel, we have two possible backlogs : The qdisc global one, and
> the flow local one.
> 
> The meaningful one for codel_should_drop() should be the global backlog,
> not the per flow one, so that thin flows can have a non zero drop/mark
> probability.
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Applied.
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