Re: [virtio-comment] Re: [virtio-dev] [PATCH v14] virtio-net: support the virtqueue coalescing moderation

["Michael S. Tsirkin" <mst@redhat.com>]

On Tue, Apr 04, 2023 at 06:29:25PM +0200, Halil Pasic wrote:
> On Thu, 23 Mar 2023 23:24:22 +0800
> Heng Qi <hengqi@linux.alibaba.com> wrote:
> 
> > +struct virtio_net_ctrl_coal_vq {
> > +    le16 vqn;
> > +    le16 reserved;
> > +    struct virtio_net_ctrl_coal coal;
> > +};
> > +
> >  #define VIRTIO_NET_CTRL_NOTF_COAL 6
> >   #define VIRTIO_NET_CTRL_NOTF_COAL_TX_SET  0
> >   #define VIRTIO_NET_CTRL_NOTF_COAL_RX_SET 1
> > + #define VIRTIO_NET_CTRL_NOTF_COAL_VQ_SET 2
> > + #define VIRTIO_NET_CTRL_NOTF_COAL_VQ_GET 3
> >  \end{lstlisting}
> >  
> >  Coalescing parameters:
> >  \begin{itemize}
> > +\item \field{vqn}: The virtqueue number of an enabled transmit or receive virtqueue.
> 
> Just to be on the safe side: VIRTIO_F_NOTIF_CONFIG_DATA has been
> negotiated, and queue_select != queue_notify_data, is vqn supposed
> to contain queue_notify_data or the number/index that is used for
> queue_select (I'm talking about the PCI transport case)?
> 
> Regards,
> Halil

I think it's the vq number as it says here, this is not transport specific.

-- 
MST


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