学习Linux如何实现虚拟存储。与体系结构无关的通用存储模型是所有Linux虚拟存储实现的基础，但是任何特定的实现都依赖于特定的硬件平台。本练习集中于i386的实现。介绍解释了存储管理程序的设计。而且还将学习代码细节，修改虚拟存储代码以检测系统缺页错误的发生频率。此外本实验牵涉到系统调用的相关知识，包括学习如何产生一个系统调用以及怎样通过往内核中增加一个新函数从而在内核空间中实现对用户空间的读/写。-learning how Linux virtual memory. Architecture has nothing to do with the general storage model is all Linux virtual memory to achieve the foundation, However, the realization of any particular are dependent on specific hardware platform. The exercises focus on the realization of i386. Introduced to explain the storage management process design. But will also learn details of code, code changes virtual memory system to detect the Page wrong frequency. In addition to the experimental system calls involved the relevant knowledge, including learning how to produce a system call and how the kernel through to add a new function in the kernel space thus Real User space is the right time / write.