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-<table class="head">
- <tr>
- <td class="head-ltitle">VM_FAULT_PREFAULT(9)</td>
- <td class="head-vol">Kernel Developer's Manual</td>
- <td class="head-rtitle">VM_FAULT_PREFAULT(9)</td>
- </tr>
-</table>
-<div class="manual-text">
-<section class="Sh">
-<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
-<p class="Pp"><code class="Nm">vm_fault_prefault</code> &#x2014;
- <span class="Nd">cluster page faults into a process's address
- space</span></p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
-<p class="Pp"><code class="In">#include
- &lt;<a class="In">sys/param.h</a>&gt;</code>
- <br/>
- <code class="In">#include &lt;<a class="In">vm/vm.h</a>&gt;</code>
- <br/>
- <code class="In">#include &lt;<a class="In">vm/pmap.h</a>&gt;</code></p>
-<p class="Pp"><var class="Ft">void</var>
- <br/>
- <code class="Fn">vm_fault_prefault</code>(<var class="Fa" style="white-space: nowrap;">pmap_t
- pmap</var>, <var class="Fa" style="white-space: nowrap;">vm_offset_t
- addra</var>, <var class="Fa" style="white-space: nowrap;">vm_map_entry_t
- entry</var>);</p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
-<p class="Pp">The
- <a class="permalink" href="#vm_fault_prefault"><code class="Fn" id="vm_fault_prefault">vm_fault_prefault</code></a>()
- function provides a means of clustering pagefaults into a process's address
- space. It operates upon the physical map <var class="Fa">pmap</var>. The
- <var class="Fa">entry</var> argument specifies the entry to be prefaulted;
- the <var class="Fa">addra</var> argument specifies the beginning of the
- mapping in the process's virtual address space.</p>
-<p class="Pp" id="vm_fault">It is typically called by
- <a class="permalink" href="#vm_fault"><code class="Fn">vm_fault</code></a>()
- after the first page fault. It benefits the <a class="Xr">execve(2)</a>
- system call by eliminating repetitive calls to
- <code class="Fn">vm_fault</code>(), which would otherwise be made to bring
- the process's executable pages into physical memory.</p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="IMPLEMENTATION_NOTES"><a class="permalink" href="#IMPLEMENTATION_NOTES">IMPLEMENTATION
- NOTES</a></h1>
-<p class="Pp">This is a machine-independent function which calls the
- machine-dependent <a class="Xr">pmap_is_prefaultable(9)</a> helper function
- to determine if a page may be prefaulted into physical memory.</p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
- ALSO</a></h1>
-<p class="Pp"><a class="Xr">execve(2)</a>,
- <a class="Xr">pmap_is_prefaultable(9)</a></p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
-<p class="Pp">This manual page was written by <span class="An">Bruce M
- Simpson</span>
- &lt;<a class="Mt" href="mailto:bms@spc.org">bms@spc.org</a>&gt;.</p>
-</section>
-</div>
-<table class="foot">
- <tr>
- <td class="foot-date">July 21, 2003</td>
- <td class="foot-os">FreeBSD 15.0</td>
- </tr>
-</table>