Re: [RFC v3 8/8] vhost-vdpa: introduce vhost-vdpa net client

[Jason Wang]

On 2020/6/3 下午4:19, Cindy Lu wrote:
+static void vhost_vdpa_cleanup(NetClientState *nc)
+{
+    VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
+
+    if (s->vhost_net) {
+        vhost_net_cleanup(s->vhost_net);
+        g_free(s->vhost_net);
+        s->vhost_net = NULL;
+    }
+
+    qemu_purge_queued_packets(nc);
Why this is needed?

Thanks

This is to clean the packet in the queue while the vdpa remove,  I
will double check this part


Note we don't have a software backup driver for qemu currently (we 
probably need one in the future).

So we can't fallback into userspace which means the packet can not be 
queued by qemu.

Thanks