The memory of a virtual machine is stored the same as memory is for any other Linux process and can be swapped, backed by large pages for better performance, shared, or backed by a disk file. 一个虚拟机的内存与任何其他Linux进程的内存一样进行存储,可以以大页面的形式进行交换以实现更高的性能,也可以磁盘文件的形式进行共享。