From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sasha Levin <levinsasha928@gmail.com>
Subject: Re: [net-next RFC V5 5/5] virtio_net: support negotiating the
	number of queues through ctrl vq
Date: Thu, 05 Jul 2012 14:51:19 +0200
Message-ID: <1341492679.18786.18.camel@lappy>
References: <1341484194-8108-1-git-send-email-jasowang@redhat.com>
	<1341484194-8108-6-git-send-email-jasowang@redhat.com>
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To: Jason Wang <jasowang@redhat.com>
Cc: krkumar2@in.ibm.com, habanero@linux.vnet.ibm.com, mashirle@us.ibm.com, kvm@vger.kernel.org, mst@redhat.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, edumazet@google.com, tahm@linux.vnet.ibm.com, jwhan@filewood.snu.ac.kr, davem@davemloft.net, sri@us.ibm.com
List-Id: virtualization@lists.linuxfoundation.org

On Thu, 2012-07-05 at 18:29 +0800, Jason Wang wrote:
> @@ -1387,6 +1404,10 @@ static int virtnet_probe(struct virtio_device *vdev)
>         if (virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ))
>                 vi->has_cvq = true;
>  
> +       /* Use single tx/rx queue pair as default */
> +       vi->num_queue_pairs = 1;
> +       vi->total_queue_pairs = num_queue_pairs; 

The code is using this "default" even if the amount of queue pairs it
wants was specified during initialization. This basically limits any
device to use 1 pair when starting up.