netdev - Re: [net-2.6 PATCH 2/2] ixgbe: Don't priority tag control frames in DCB mode

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Message-Id: <20090723.110614.180424233.davem@davemloft.net>
Date:	Thu, 23 Jul 2009 11:06:14 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jeffrey.t.kirsher@...el.com
Cc:	netdev@...r.kernel.org, gospo@...hat.com, lucy.liu@...el.com,
	peter.p.waskiewicz.jr@...el.com
Subject: Re: [net-2.6 PATCH 2/2] ixgbe: Don't priority tag control frames
 in DCB mode

From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Date: Wed, 22 Jul 2009 17:07:33 -0700

> From: Lucy Liu <lucy.liu@...el.com>
> 
> Certain types of control packets (LLDP, LACP, etc.) are not supposed to have a
> priority tag or vlan tag inserted.  Ixgbe driver is currently priority
> tagging everything (if packet is not on a VLAN interface).
> 
> This patch modifies DCB mode, so that packets marked with skb priority
> TC_PRIO_CONTROL are not priority tagged.  It also transmits these packets on
> the highest priority traffic class.
> Programs (like dcbd) can set the skb priority using a socket option.  Or, a tc
> filter can be configured to set the priority value. Using the value
> TC_PRIO_CONTROL (7) has the benefit that it is already defined in the kernel,
> and the bonding LACP code already sets the skb->priority field to this value.
> 
> Signed-off-by: Lucy Liu <lucy.liu@...el.com>
> Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>

Applied.
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