A set of shadow page tables is maintained to support the translation from guest physical addresses to host physical addresses. 为了支持客户物理地址到主机物理地址的转换,系统维护了一组影子页表(shadowpagetable)。
This method use check-pointing mechanism, and the workflow of the primary Virtual Machine is divided into two stages: running and synchronization. One of the two Shadow Page Tables is as the main table, the other is as the alternate table. 该方法采用检查点机制,将主虚拟机工作周期分为运行和同步两个阶段,双影子页表交替作为主页表和备用页表。