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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>get_pfn_range_for_nid</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="The Linux Kernel API" /><link rel="up" href="ch04s03.html" title="More Memory Management Functions" /><link rel="prev" href="re201.html" title="sparse_memory_present_with_active_regions" /><link rel="next" href="re203.html" title="absent_pages_in_range" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>get_pfn_range_for_nid</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re201.html">Prev</a> </td><th width="60%" align="center">More Memory Management Functions</th><td width="20%" align="right"> <a accesskey="n" href="re203.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="get_pfn_range_for_nid"><a id="API-get-pfn-range-for-nid"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>get_pfn_range_for_nid —
Return the start and end page frames for a node
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">void __meminit <b class="fsfunc">get_pfn_range_for_nid </b>(</code></td><td>unsigned int <var class="pdparam">nid</var>, </td></tr><tr><td> </td><td>unsigned long * <var class="pdparam">start_pfn</var>, </td></tr><tr><td> </td><td>unsigned long * <var class="pdparam">end_pfn</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2981263"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>nid</code></em></span></dt><dd><p>
The nid to return the range for. If MAX_NUMNODES, the min and max PFN are returned.
</p></dd><dt><span class="term"><em class="parameter"><code>start_pfn</code></em></span></dt><dd><p>
Passed by reference. On return, it will have the node start_pfn.
</p></dd><dt><span class="term"><em class="parameter"><code>end_pfn</code></em></span></dt><dd><p>
Passed by reference. On return, it will have the node end_pfn.
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2981326"></a><h2>Description</h2><p>
It returns the start and end page frame of a node based on information
provided by an arch calling <code class="function">add_active_range</code>. If called for a node
with no available memory, a warning is printed and the start and end
PFNs will be 0.
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