[RFC 01/27] vhost: fix missing guest notif stat increment

[Xia, Chenbo]

> -----Original Message-----
> From: Maxime Coquelin <maxime.coquelin at redhat.com>
> Sent: Friday, March 31, 2023 11:43 PM
> To: dev at dpdk.org; david.marchand at redhat.com; Xia, Chenbo
> <chenbo.xia at intel.com>; mkp at redhat.com; fbl at redhat.com;
> jasowang at redhat.com; Liang, Cunming <cunming.liang at intel.com>; Xie, Yongji
> <xieyongji at bytedance.com>; echaudro at redhat.com; eperezma at redhat.com;
> amorenoz at redhat.com
> Cc: Maxime Coquelin <maxime.coquelin at redhat.com>; stable at dpdk.org
> Subject: [RFC 01/27] vhost: fix missing guest notif stat increment
> 
> Guest notification counter was only incremented for split
> ring, this patch adds it also for packed ring.
> 
> Fixes: 1ea74efd7fa4 ("vhost: add statistics for guest notification")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>
> ---
>  lib/vhost/vhost.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/lib/vhost/vhost.h b/lib/vhost/vhost.h
> index 8fdab13c70..8554ab4002 100644
> --- a/lib/vhost/vhost.h
> +++ b/lib/vhost/vhost.h
> @@ -973,6 +973,8 @@ vhost_vring_call_packed(struct virtio_net *dev, struct
> vhost_virtqueue *vq)
>  kick:
>  	if (kick) {
>  		eventfd_write(vq->callfd, (eventfd_t)1);
> +		if (dev->flags & VIRTIO_DEV_STATS_ENABLED)
> +			vq->stats.guest_notifications++;
>  		if (dev->notify_ops->guest_notified)
>  			dev->notify_ops->guest_notified(dev->vid);
>  	}
> --
> 2.39.2

Reviewed-by: Chenbo Xia <chenbo.xia at intel.com>