> 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_zero_page.9.md).

# pmap\_zero\_page.9

`pmap_zero_page` — 使用机器相关优化对页面进行零填充

## 名称

`pmap_zero_page`, `pmap_zero_area`

## 概要

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

```c
#include <vm/vm.h>
```

```c
#include <vm/pmap.h>
```

```c
void
pmap_zero_page(vm_page_t m)

void
pmap_zero_page_area(vm_page_t m, int off, int size)
```

## 描述

`pmap_zero_page` 函数使用机器相关优化对整个页面进行零填充。`pmap_zero_page_area` 函数用于对页面的某个区域进行零填充。指定的范围不得跨越页面边界；它必须完全包含在单个页面内。

## 实现说明

FreeBSD 支持的每种架构都必须实现此函数。

## 参见

[bzero(3)](https://github.com/FreeBSD-Ask/freebsd-man-sc/tree/main/man3/bzero.3.md), [pmap(9)](/man/man9/pmap.9.md)

## 作者

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


---

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