1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>try_to_release_page</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><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="API-generic-file-write-iter.html" title="generic_file_write_iter"><link rel="next" href="API-zap-vma-ptes.html" title="zap_vma_ptes"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">try_to_release_page</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-generic-file-write-iter.html">Prev</a>&#160;</td><th width="60%" align="center">More Memory Management Functions</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-zap-vma-ptes.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-try-to-release-page"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>try_to_release_page &#8212; 
2     release old fs-specific metadata on a page
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">try_to_release_page </b>(</code></td><td>struct page * <var class="pdparam">page</var>, </td></tr><tr><td>&#160;</td><td>gfp_t <var class="pdparam">gfp_mask</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1124255060"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>page</code></em></span></dt><dd><p>
4     the page which the kernel is trying to free
5    </p></dd><dt><span class="term"><em class="parameter"><code>gfp_mask</code></em></span></dt><dd><p>
6     memory allocation flags (and I/O mode)
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1124257740"></a><h2>Description</h2><p>
8   The address_space is to try to release any data against the page
9   (presumably at page-&gt;private).  If the release was successful, return `1'.
10   Otherwise return zero.
11   </p><p>
12
13   This may also be called if PG_fscache is set on a page, indicating that the
14   page is known to the local caching routines.
15   </p><p>
16
17   The <em class="parameter"><code>gfp_mask</code></em> argument specifies whether I/O may be performed to release
18   this page (__GFP_IO), and whether the call may block (__GFP_WAIT &amp; __GFP_FS).
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