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+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
+<refentry id="vfs_io_uring.8">
+
+<refmeta>
+ <refentrytitle>vfs_io_uring</refentrytitle>
+ <manvolnum>8</manvolnum>
+ <refmiscinfo class="source">Samba</refmiscinfo>
+ <refmiscinfo class="manual">System Administration tools</refmiscinfo>
+ <refmiscinfo class="version">&doc.version;</refmiscinfo>
+</refmeta>
+
+<refnamediv>
+ <refname>vfs_io_uring</refname>
+ <refpurpose>Implement async io in Samba vfs using io_uring of Linux (>= 5.1).</refpurpose>
+</refnamediv>
+
+<refsynopsisdiv>
+ <cmdsynopsis>
+ <command>vfs objects = io_uring</command>
+ </cmdsynopsis>
+</refsynopsisdiv>
+
+<refsect1>
+ <title>DESCRIPTION</title>
+
+ <para>This VFS module is part of the
+ <citerefentry><refentrytitle>samba</refentrytitle>
+ <manvolnum>7</manvolnum></citerefentry> suite.</para>
+
+ <para>The <command>io_uring</command> VFS module enables asynchronous
+ pread, pwrite and fsync using the io_uring infrastructure of Linux (>= 5.1).
+ This provides much less overhead compared to the usage of the pthreadpool for
+ async io.</para>
+
+ <para>This module SHOULD be listed last in any module stack as
+ it requires real kernel file descriptors.</para>
+
+</refsect1>
+
+
+<refsect1>
+ <title>EXAMPLES</title>
+
+ <para>Straight forward use:</para>
+
+<programlisting>
+ <smbconfsection name="[cooldata]"/>
+ <smbconfoption name="path">/data/ice</smbconfoption>
+ <smbconfoption name="vfs objects">io_uring</smbconfoption>
+</programlisting>
+
+</refsect1>
+
+<refsect1>
+ <title>OPTIONS</title>
+
+ <variablelist>
+
+ <varlistentry>
+ <term>io_uring:num_entries = NUMBER_OF_QUEUE_ENTRIES</term>
+ <listitem>
+ <para>The number of entries in the submission queue.
+ The maximum allowed value depends on the kernel version
+ and the kernel will roundup the value to a power of 2.
+ </para>
+ <para>The default is '128'.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>io_uring:sqpoll = BOOL</term>
+ <listitem>
+ <para>Use the IORING_SETUP_SQPOLL feature.
+ </para>
+ <para>The default is 'no'.</para>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
+</refsect1>
+
+<refsect1>
+ <title>SEE ALSO</title>
+ <para>
+ <citerefentry><refentrytitle>io_uring_setup</refentrytitle><manvolnum>2</manvolnum></citerefentry>.
+ </para>
+</refsect1>
+
+<refsect1>
+ <title>VERSION</title>
+
+ <para>This man page is part of version &doc.version; of the Samba suite.
+ </para>
+</refsect1>
+
+<refsect1>
+ <title>AUTHOR</title>
+
+ <para>The original Samba software and related utilities
+ were created by Andrew Tridgell. Samba is now developed
+ by the Samba Team as an Open Source project similar
+ to the way the Linux kernel is developed.</para>
+
+</refsect1>
+
+</refentry>