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写时复制(Copy On Write)章节问题 #49

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KJohn2q opened this issue Jul 30, 2021 · 0 comments
Open

写时复制(Copy On Write)章节问题 #49

KJohn2q opened this issue Jul 30, 2021 · 0 comments

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@KJohn2q
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KJohn2q commented Jul 30, 2021

第一段：一般我们运行程序都是Fork一个进程后马上执行Exec加载程序，而Fork的是否实际上用的是父进程的堆栈空间，Linux通过Copy On Write技术极大地减少了Fork的开销。 读起来并不顺，是否该改为 Fork实际上用的是父进程的堆栈空间

第二段：Copy On Write的含义是只有真正写的时候才把数据写到子进程的数据，Fork时只会把页表复制到子进��，这样父子进程都指向同一个物理内存页，只有再写子进程的时候才会把内存页的内容重新复制一份。 再是否改改为在
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