netdev - Re: [net-next RFC V5 4/5] virtio

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Date:	Sat, 21 Jul 2012 14:02:58 +0200
From:	Sasha Levin <levinsasha928@...il.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
CC:	Jason Wang <jasowang@...hat.com>, mashirle@...ibm.com,
	krkumar2@...ibm.com, habanero@...ux.vnet.ibm.com,
	rusty@...tcorp.com.au, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org, edumazet@...gle.com,
	tahm@...ux.vnet.ibm.com, jwhan@...ewood.snu.ac.kr,
	davem@...emloft.net, akong@...hat.com, kvm@...r.kernel.org,
	sri@...ibm.com
Subject: Re: [net-next RFC V5 4/5] virtio_net: multiqueue support

On 07/20/2012 03:40 PM, Michael S. Tsirkin wrote:
>> -	err = init_vqs(vi);
>> > +	if (virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ))
>> > +		vi->has_cvq = true;
>> > +
> How about we disable multiqueue if there's no cvq?
> Will make logic a bit simpler, won't it?

multiqueues don't really depend on cvq. Does this added complexity really justifies adding an artificial limit?


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