1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>rpc_malloc</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Networking and Network Devices APIs"><link rel="up" href="ch01s05.html" title="SUN RPC subsystem"><link rel="prev" href="API-rpc-wake-up-status.html" title="rpc_wake_up_status"><link rel="next" href="API-rpc-free.html" title="rpc_free"></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">rpc_malloc</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-rpc-wake-up-status.html">Prev</a>&#160;</td><th width="60%" align="center">SUN RPC subsystem</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-rpc-free.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-rpc-malloc"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>rpc_malloc &#8212; 
2     allocate an RPC buffer
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">void * <b class="fsfunc">rpc_malloc </b>(</code></td><td>struct rpc_task * <var class="pdparam">task</var>, </td></tr><tr><td>&#160;</td><td>size_t <var class="pdparam">size</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1097232348"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>task</code></em></span></dt><dd><p>
4     RPC task that will use this buffer
5    </p></dd><dt><span class="term"><em class="parameter"><code>size</code></em></span></dt><dd><p>
6     requested byte size
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1097235004"></a><h2>Description</h2><p>
8   To prevent rpciod from hanging, this allocator never sleeps,
9   returning NULL and suppressing warning if the request cannot be serviced
10   immediately.
11   The caller can arrange to sleep in a way that is safe for rpciod.
12   </p><p>
13
14   Most requests are 'small' (under 2KiB) and can be serviced from a
15   mempool, ensuring that NFS reads and writes can always proceed,
16   and that there is good locality of reference for these buffers.
17   </p><p>
18
19   In order to avoid memory starvation triggering more writebacks of
20   NFS requests, we avoid using GFP_KERNEL.
21</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-rpc-wake-up-status.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="ch01s05.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-rpc-free.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">rpc_wake_up_status</span>&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;<span class="phrase">rpc_free</span></td></tr></table></div></body></html>
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