netdev - Re: [net-next-2.6 PATCH 2/5] igb: Use only a single Tx queue in SR-IOV mode

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Date:	Thu, 01 Jul 2010 22:50:03 -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,
	stable@...nel.org, gregory.v.rose@...el.com
Subject: Re: [net-next-2.6 PATCH 2/5] igb: Use only a single Tx queue in
 SR-IOV mode

From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Date: Thu, 01 Jul 2010 16:38:16 -0700

> From: Greg Rose <gregory.v.rose@...el.com>
> 
> The 82576 expects the second rx queue in any pool to receive L2 switch
> loop back packets sent from the second tx queue in another pool.  The
> 82576 VF driver does not enable the second rx queue so if the PF driver
> sends packets destined to a VF from its second tx queue then the VF
> driver will never see them.  In SR-IOV mode limit the number of tx queues
> used by the PF driver to one. This patch fixes a bug reported in which
> the PF cannot communciate with the VF and should be considered for 2.6.34
> stable.
> 
> CC: stable@...nel.org
> Signed-off-by: Greg Rose <gregory.v.rose@...el.com>
> Tested-by: Jeff Pieper <jeffrey.e.pieper@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>

Applied.
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