VHOST_SET_VRING_NUM   50 include/uapi/linux/vhost.h #define VHOST_SET_VRING_NUM _IOW(VHOST_VIRTIO, 0x10, struct vhost_vring_state)
VHOST_SET_VRING_NUM   50 tools/include/uapi/linux/vhost.h #define VHOST_SET_VRING_NUM _IOW(VHOST_VIRTIO, 0x10, struct vhost_vring_state)