开启openvz虚拟机的时候总也失败，命令行启动提示错误如下：
vzctl start 189
Starting container ...
vzquota : (error) Quota on syscall for id 156: Device or resource busy
vzquota : (error) Possible reasons:
vzquota : (error) - Container's root is already mounted
vzquota : (error) - there are opened files inside Container's private area
vzquota : (error) -...