> For the complete documentation index, see [llms.txt](https://book.bsdcn.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.bsdcn.org/man/man9/pmap_is_modified.9.md).

# pmap\_is\_modified.9

`pmap_is_modified` — 返回有关物理页面的信息

## 名称

`pmap_is_modified`, `pmap_ts_modified`

## 概要

`#include <sys/param.h>`

`#include <vm/vm.h>`

`#include <vm/pmap.h>`

`Ft bool Fn pmap_is_modified vm_page_t m Ft int Fn pmap_ts_referenced vm_page_t m`

## 描述

`pmap_is_modified` 和 `pmap_ts_referenced` 函数返回有关物理页面的信息。

## 返回值

`pmap_is_modified` 函数返回物理页面 `m` 的"页面已修改"位的状态。

`pmap_ts_referenced` 函数返回页面 `m` 的引用位计数，并清除这些位。不必清除每个引用位，但当页面上没有剩余引用位设置时，必须返回 0。

## 参见

[pmap(9)](/man/man9/pmap.9.md), [pmap\_clear\_modify(9)](/man/man9/pmap_clear_modify.9.md)

## 作者

本手册页由 Bruce M Simpson <bms@spc.org> 编写。


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