> 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/vm_page_dontneed.9.md).

# vm\_page\_dontneed.9

`vm_page_dontneed` — 指示页面不再需要

## 名称

`vm_page_dontneed`

## 概要

```c
#include <sys/param.h>
#include <vm/vm.h>
#include <vm/vm_page.h>

void
vm_page_dontneed(vm_page_t m)
```

## 描述

`vm_page_dontneed` 函数通知 VM 系统给定页面不再需要。如果页面已在非活跃队列或缓存队列中，此函数不执行任何操作；否则停用该页面。

注意，`vm_page_dontneed` 不一定停用页面，而是实现了一种算法，试图防止小对象的页面被过快重用，以及大对象的页面在释放时将较小的对象从队列中冲刷出去。

## 参见

[vm\_page\_deactivate(9)](/man/man9/vm_page_deactivate.9.md)

## 作者

本手册页由 Chad David <davidc@acns.ab.ca> 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/vm_page_dontneed.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.