From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [net-next-2.6 PATCH 2/5] igb: Use only a single Tx queue in SR-IOV mode Date: Thu, 01 Jul 2010 22:50:03 -0700 (PDT) Message-ID: <20100701.225003.139551397.davem@davemloft.net> References: <20100701233733.16171.4629.stgit@localhost.localdomain> <20100701233814.16171.78454.stgit@localhost.localdomain> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, gospo@redhat.com, bphilips@novell.com, stable@kernel.org, gregory.v.rose@intel.com To: jeffrey.t.kirsher@intel.com Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:49323 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755089Ab0GBFtt (ORCPT ); Fri, 2 Jul 2010 01:49:49 -0400 In-Reply-To: <20100701233814.16171.78454.stgit@localhost.localdomain> Sender: netdev-owner@vger.kernel.org List-ID: From: Jeff Kirsher Date: Thu, 01 Jul 2010 16:38:16 -0700 > From: Greg Rose > > 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@kernel.org > Signed-off-by: Greg Rose > Tested-by: Jeff Pieper > Signed-off-by: Jeff Kirsher Applied.