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<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE article PUBLIC "-//FreeBSD//DTD DocBook XML V5.0-Based Extension//EN"
"http://www.FreeBSD.org/XML/share/xml/freebsd50.dtd" [
<!ENTITY % release PUBLIC "-//FreeBSD//ENTITIES Release Specification//EN"
"http://www.FreeBSD.org/release/XML/release.ent">
%release;
]>
<article xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0">
<info>
<title>&os; &release.prev; Errata </title>
<author><orgname>The &os; Project</orgname></author>
<pubdate>$FreeBSD$</pubdate>
<copyright>
<year>2014</year>
<holder role="mailto:doc@FreeBSD.org">The &os; Documentation
Project</holder>
</copyright>
<legalnotice xml:id="trademarks" role="trademarks">
&tm-attrib.freebsd;
&tm-attrib.intel;
&tm-attrib.sparc;
&tm-attrib.general;
</legalnotice>
<abstract>
<para>This document lists errata items for &os; &release.prev;,
containing significant information discovered after the
release or too late in the release cycle to be otherwise
included in the release documentation. This information
includes security advisories, as well as news relating to the
software or documentation that could affect its operation or
usability. An up-to-date version of this document should
always be consulted before installing this version of
&os;.</para>
<para>This errata document for &os; &release.prev; will be
maintained until the release of &os; &release.next;.</para>
</abstract>
</info>
<sect1 xml:id="intro">
<title>Introduction</title>
<para>This errata document contains <quote>late-breaking
news</quote> about &os; &release.prev; Before installing this
version, it is important to consult this document to learn about
any post-release discoveries or problems that may already have
been found and fixed.</para>
<para>Any version of this errata document actually distributed
with the release (for example, on a CDROM distribution) will be
out of date by definition, but other copies are kept updated on
the Internet and should be consulted as the <quote>current
errata</quote> for this release. These other copies of the
errata are located at <link
xlink:href="http://www.FreeBSD.org/releases/" />, plus any
sites which keep up-to-date mirrors of this location.</para>
<para>Source and binary snapshots of &os; &release.branch; also
contain up-to-date copies of this document (as of the time of
the snapshot).</para>
<para>For a list of all &os; CERT security advisories, see <link
xlink:href="http://www.FreeBSD.org/security/"/> or <link
xlink:href="ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/"/>.</para>
</sect1>
<sect1 xml:id="security">
<title>Security Advisories</title>
<informaltable frame="none" pgwide="0">
<tgroup cols="3">
<colspec colwidth="1*" />
<colspec colwidth="1*" />
<colspec colwidth="3*" />
<thead>
<row>
<entry>Advisory</entry>
<entry>Date</entry>
<entry>Topic</entry>
</row>
</thead>
<tbody>
<row>
<entry>No advisories.</entry>
<entry> </entry>
<entry> </entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect1>
<sect1 xml:id="open-issues">
<title>Open Issues</title>
<itemizedlist>
<listitem>
<para>&os;/&arch.i386; &release.prev; running as a guest
operating system on <application>VirtualBox</application>
can have a problem with disk I/O access. It depends on some
specific hardware configuration and does not depend on a
specific version of <application>VirtualBox</application> or
host operating system.</para>
<para>It causes various errors and makes &os; quite unstable.
Although the cause is still unclear, disabling unmapped I/O
works as a workaround. To disable it, choose
<literal>Escape to loader prompt</literal> in the boot menu
and enter the following lines from &man.loader.8; prompt,
after an <literal>OK</literal>:</para>
<screen>set vfs.unmapped_buf_allowed=0
boot</screen>
<para>Note that the following line has to be added to
<filename>/boot/loader.conf</filename> after a boot. It
disables unmapped I/O at every boot:</para>
<programlisting>vfs.unmapped_buf_allowed=0</programlisting>
<para>[2014-04-03 update] It has been reported that
instability may be present on virtual machines running
on other hypervisors, such as Xen or KVM.</para>
</listitem>
</itemizedlist>
</sect1>
<sect1 xml:id="late-news">
<title>Late-Breaking News</title>
<para>No news.</para>
</sect1>
</article>
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