The first page of virtual memory in the kernel address space can be accessed by kernel code, but is marked as read-only.
内核地址空间中的第一页虚拟内存可通过内核代码访问，但是被标记为只读。
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)。
From here, you can determine that its objectives are to help minimize both the response time of page faults and to decrease the use of virtual memory where it can.
由此可以看出，它的目标是帮助最大限度地缩短缺页响应时间，并在可能的情况下减少虚拟内存的使用。
In the Linux memory manager, page tables keep track of the physical pages of memory that are used by a process, and they map the virtual pages to the physical pages.
在Linux内存管理器中，页表保持对进程使用的内存物理页的追踪，它们将虚拟页映射到物理页。
The Linux kernel operates in a virtual memory mode: for every virtual page there is a corresponding physical page of memory in the system.
Linux内核工作于虚拟内存模式：每一个虚拟页对应一个相应的系统内存的物理页。
The Virtual Memory Manager (VMM) of AIX anticipates page requirements for observing the patterns of files that are accessed.
通过观察文件的访问模式，AIX的虚拟内存管理器(Virtual Memory Manager,VMM)可以预测页面需求。
The main purpose for large page usage is to improve system performance for high-performance computing applications or any memory-access-intensive application that uses large amounts of virtual memory.
使用大页面的主要目的是，提高高性能计算应用程序或使用大量虚拟内存的任何内存访问密集型应用程序的系统性能。
Each operating-system process is allocated its own virtual address space — a set of virtual-memory pages that it can read from and write to. Each page can be in one of three states.
每个操作系统进程占用自己的虚拟地址空间，即一组可以读写的虚拟内存页。
Entry consists of the virtual address of the page stored in that real memory location, with information about the process that owns that page.
表项包含真正内存地址的页的虚拟地址，它包括拥有这个页的进程的信息。
Improving virtual memory page replacement can reduce page fault rate, and therefore improve the performance of the system.
改进页面置换算法，可以降低页面失败率，从而有效地提高系统性能。
Improving virtual memory page replacement can reduce page fault rate, and therefore improve the performance of the system.
改进页面置换算法，可以降低页面失败率，从而有效地提高系统性能。
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