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posts/operating-systems-12/
结合上一篇文章,堆和栈之间有一大块“空闲”空间,如果没被使用,也占用了物理内存。如果虚拟内存地址空间很大,对物理内存也是极大的浪费,回想一下,进程确实有权力拥有这么大的空间,最大可以拥有最大段大小的地址空间,进程完全可以声明自己需要这么大空间,但可能不会使用,操作系统总得给它预留这么多。
https://hjk.life/posts/operating-systems-12/
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