Re: [RFC PATCH 08/27] vhost: Add a flag for software assisted Live Migration

[Stefan Hajnoczi]

On Fri, Nov 20, 2020 at 07:50:46PM +0100, Eugenio Pérez wrote:
> @@ -1571,6 +1577,13 @@ void vhost_dev_disable_notifiers(struct vhost_dev 
> *hdev, VirtIODevice *vdev)
>      BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
>      int i, r;
>  
> +    if (hdev->sw_lm_enabled) {
> +        /* We've been called after migration is completed, so no need to
> +           disable it again
> +        */
> +        return;
> +    }
> +
>      for (i = 0; i < hdev->nvqs; ++i) {
>          r = virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), hdev->vq_index + 
> i,
>                                           false);

What is the purpose of this?

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