> 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_mincore.9.md).

# pmap\_mincore.9

`pmap_mincore` — 确定虚拟地址是否驻留在物理内存中

## 名称

`pmap_mincore`

## 概要

`#include <sys/param.h>`

`#include <vm/vm.h>`

`#include <vm/pmap.h>`

`Ft int Fn pmap_mincore pmap_t pmap vm_offset_t addr`

## 描述

`pmap_mincore` 函数确定物理映射 `pmap` 中虚拟地址 `addr` 处的页面是否驻留在物理内存中。它是 mincore(2) 系统调用使用的机器相关接口。

## 返回值

如果页面驻留在物理内存中，则返回一个标志掩码，其含义记录在 mincore(2) 中；否则返回 0。

`pmap` 必须存在且 `addr` 必须映射到 `pmap` 中。如果发生任何错误，机器相关实现应返回 0。

## 参见

mincore(2), [pmap(9)](/man/man9/pmap.9.md)

## 作者

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


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://book.bsdcn.org/man/man9/pmap_mincore.9.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.