Function devices::virtio::balloon::handle_target_reached   
source ยท async fn handle_target_reached(
    ex: &Executor,
    target_reached_evt: Event,
    vm_memory_client: &VmMemoryClient,
) -> Result<()>async fn handle_target_reached(
    ex: &Executor,
    target_reached_evt: Event,
    vm_memory_client: &VmMemoryClient,
) -> Result<()>