netdev - Re: [net-next PATCH 1/3] ixgbe: Add support for multiple Tx queues for FCoE in 82599

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Message-Id: <20090903.200809.212485138.davem@davemloft.net>
Date:	Thu, 03 Sep 2009 20:08:09 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jeffrey.t.kirsher@...el.com
Cc:	netdev@...r.kernel.org, gospo@...hat.com, yi.zou@...el.com
Subject: Re: [net-next PATCH 1/3] ixgbe: Add support for multiple Tx queues
 for FCoE in 82599

From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Date: Thu, 03 Sep 2009 17:55:50 -0700

> From: Yi Zou <yi.zou@...el.com>
> 
> This patch adds support for multiple transmit queues to the Fiber Channel
> over Ethernet (FCoE) feature found in 82599. Currently, FCoE has multiple
> Rx queues available, along with a redirection table, that helps distribute
> the I/O load across multiple CPUs based on the FC exchange ID. To make
> this the most effective, we need to provide the same layout of transmit
> queues to match receive.
> 
> Particularly, when Data Center Bridging (DCB) is enabled, the designated
> traffic class for FCoE can have dedicated queues for just FCoE traffic,
> while not affecting any other type of traffic flow.
> 
> Signed-off-by: Yi Zou <yi.zou@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>

Applied.

So does this eat into the TX queues available to non-FCOE traffic
or is this a shared setup?
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