Subject: Re: [net-next RFC V5 5/5] virtio_net: support negotiating the number of queues through ctrl vq

From: Amos Kong <[email-masked]>
Date: Fri, 06 Jul 2012 04:07:19 +0800

On 07/05/2012 08:51 PM, Sasha Levin wrote:
> 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; 

vi->total_queue_pairs also should be set to 1

           vi->total_queue_pairs = 1;

> 
> 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.
> 
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-- 
			Amos.