什么是页面错误? [英] What is a page fault?

问题描述

什么是页面错误，操作系统如何处理?

What is a pagefault and what does the OS do with it?

推荐答案

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页面错误是大多数计算机上的内存管理单元引发的异常.当存在对未映射内存区域的访问，或者某个进程试图通过访问另一个进程的内存空间来自我扩展时，就会发生这种情况.

操作系统只需要映射到内存区域(有时从交换文件中加载它)或杀死有问题的进程.

A page fault is an exception that is raised by the Memory Management Unit on most computers. It occurs when there''s been an access to an unmapped area of memory, or a process has tried to overreach itself by accessing another process'' memory space.

The OS simply has to map in the area of memory (sometimes loading it from a swap file) or kill the offending process.

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