netdev - Re: [PATCH v2 2/2] [iproute2/tc] hfsc: add link layer overhead adaption

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Date:	Tue, 24 Jun 2008 11:14:40 +0100
From:	Andy Furniss <lists@...yfurniss.entadsl.com>
To:	Jussi Kivilinna <jussi.kivilinna@...et.fi>
CC:	netdev@...r.kernel.org, Patrick McHardy <kaber@...sh.net>,
	Stephen Hemminger <shemminger@...l.org>
Subject: Re: [PATCH v2 2/2] [iproute2/tc] hfsc: add link layer overhead adaption

Jussi Kivilinna wrote:
> Patch adds 'mpu', 'mtu', 'overhead' and 'linklayer' options to hfsc. These
> options are used to create size table for sch_hfsc. Size table is only used
> and passed to kernel if these options are used.

> +	unsigned short overhead = 0, mpu = 0;

overhead may need to be negative because skb->len on eth is payload + 14

Andy.


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