netdev - Re: [net-next-2.6 PATCH] e1000/e1000e/igb/ixgb/ixgbe: set NETIF_F

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Message-Id: <20100922.212023.91330415.davem@davemloft.net>
Date:	Wed, 22 Sep 2010 21:20:23 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jeffrey.t.kirsher@...el.com
Cc:	netdev@...r.kernel.org, gospo@...hat.com, bphilips@...ell.com,
	yi.zou@...el.com
Subject: Re: [net-next-2.6 PATCH] e1000/e1000e/igb/ixgb/ixgbe: set
 NETIF_F_HIGHDMA for VLAN feature flags

From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Date: Wed, 22 Sep 2010 20:57:58 -0700

> From: Yi Zou <yi.zou@...el.com>
> 
> If the netdev->features is set with NETIF_F_HIGHDMA, we should set the
> corresponding netdev->vlan_features as well to allow VLAN netdev created
> on top of the real netdev to be able to also benefit from HIGHDMA on 32bit
> system, reducing the performance hit that is caused by __skb_linearize(),
> particularly for large send. This is fixed in this patch for all Intel e1000,
> e1000e, igb, ixgbe, and ixgbe drivers since this should be beneficial
> to all devices supported by these drivers.
> 
> Signed-off-by: Yi Zou <yi.zou@...el.com>
> Tested-by: Emil Tantilov <emil.s.tantilov@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>

Applied.
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