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。

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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。

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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。

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