The physical hardware might have a large amount of memory, but the hypervisor might designate only 1gb of that memory for a particular virtual system's use.
物理硬件可能拥有大量的内存，但是虚拟监管系统为特定虚拟机系统的使用只分配了1GB的内存。
Therefore, that virtual system appears to be running on a piece of hardware (that is, a virtual server) with only 1gb of memory.
因此，虚拟机系统看起来好像是在一个只有1GB内存的硬件(其实就是一个虚拟机服务器)上运行。
The mapping of virtual memory to physical memory occurs through page tables, which are implemented in the underlying hardware (see Figure 1).
虚拟内存到物理内存的映射通过页表完成，这是在底层软件中实现的(见图1)。
When a program tries to access memory using a virtual address, the OS in combination with on-chip hardware maps that virtual address to the physical location.
当程序尝试使用虚拟地址访问内存时，操作系统结合片上硬件将该虚拟地址映射到物理位置。
For efficiency, given the way that the hardware manages virtual memory, memory is managed in what are called pages (4kb in size for most architectures).
为了提高效率，如果由硬件管理虚拟内存，内存是按照所谓的内存页方式进行管理的(对于大部分体系结构来说都是4kb)。
Linux includes the means to manage the available memory, as well as the hardware mechanisms for physical and virtual mappings.
Linux包括了管理可用内存的方式，以及物理和虚拟映射所使用的硬件机制。
Also, the hardware virtual memory mechanisms allow areas of memory to be protected against writing. This protects code and data from being overwritten by rogue applications.
另外，硬件虚存机制可以对内存部分区域提供写保护，以防止代码和数据被其它恶意的应用程序所篡改。
Also, the hardware virtual memory mechanisms allow areas of memory to be protected against writing. This protects code and data from being overwritten by rogue applications.
另外，硬件虚存机制可以对内存部分区域提供写保护，以防止代码和数据被其它恶意的应用程序所篡改。
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