[dpdk-dev] [PATCH v7 3/8] vhost: vring queue setup for multiple queue support

[Stephen Hemminger]

On Wed, 21 Oct 2015 11:48:09 +0800
Yuanhan Liu <yuanhan.liu at linux.intel.com> wrote:

>  struct virtio_net {
> -	struct vhost_virtqueue	*virtqueue[VIRTIO_QNUM];	/**< Contains all virtqueue information. */
> +	struct vhost_virtqueue	*virtqueue[VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX];	/**< Contains all virtqueue information. */
>  	struct virtio_memory	*mem;		/**< QEMU memory and memory region information. */

Since vhost_virtqueue takes up space, why not put it at end of array,
that way offsets are smaller and all the early fields will be in
adjacent cache lines.