All UNIX operating systems support a system of virtualmemory (VM).
所有unix操作系统都支持某种虚拟内存(VM)系统。
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Tmpfs also makes use of the disk swap space for storage, and of the virtualmemory (VM) subsystem when requesting pages for storing files.
tmpfs还使用磁盘交换空间来存储,并且当为存储文件而请求页面时,使用虚拟内存(VM)子系统。
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Such as when the VM executes code in kernel mode; then VMWare has to carefully translate the memory mapping and permissions in order to simulate the VM's virtual CPU correctly.