linux-kernel - Re: NET_SCHED cbq dropping too many packets on a bonding interface

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Message-ID: <482C81CC.7000305@trash.net>
Date:	Thu, 15 May 2008 20:32:44 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Jarek Poplawski <jarkao2@...il.com>
CC:	Kingsley Foreman <kingsley@...ernode.com.au>,
	Eric Dumazet <dada1@...mosbay.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: NET_SCHED cbq dropping too many packets on a bonding interface

Jarek Poplawski wrote:
> On Thu, May 15, 2008 at 06:09:36PM +0200, Patrick McHardy wrote:
> ...
>> Do things improve if you set txqueuelen to a larger value
>> *before* configuring the qdiscs?
> 
> BTW, I hope it was *before*, but since pfifo_fast_enqueue() uses
> "qdisc->dev->tx_queue_len" does it really matter? (Until it's
> before the test of course...)


Yes, CBQ uses pfifo, not pfifo_fast. pfifo uses txqueuelen
to inialize q->limit, but thats whats used during ->enqueue().
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