docs/mm: hugetlbfs_reserv: fix a reference to a file that doesn't exist

Overview

========

Huge pages as described at Documentation/mm/hugetlbpage.rst are typically

preallocated for application use.  These huge pages are instantiated in a

task's address space at page fault time if the VMA indicates huge pages are

to be used.  If no huge page exists at page fault time, the task is sent

Huge pages as described at Documentation/admin-guide/mm/hugetlbpage.rst are

typically preallocated for application use.  These huge pages are instantiated

in a task's address space at page fault time if the VMA indicates huge pages

are to be used.  If no huge page exists at page fault time, the task is sent

a SIGBUS and often dies an unhappy death.  Shortly after huge page support

was added, it was determined that it would be better to detect a shortage

of huge pages at mmap() time.  The idea is that if there were not enough

概述

====

Documentation/mm/hugetlbpage.rst 中描述的巨页通常是预先分配给应用程序使用的。如果VMA指

Documentation/admin-guide/mm/hugetlbpage.rst

中描述的巨页通常是预先分配给应用程序使用的 。如果VMA指

示要使用巨页，这些巨页会在缺页异常时被实例化到任务的地址空间。如果在缺页异常

时没有巨页存在，任务就会被发送一个SIGBUS，并经常不高兴地死去。在加入巨页支

持后不久，人们决定，在mmap()时检测巨页的短缺情况会更好。这个想法是，如果