article.xml revision 278267 
1<?xml version="1.0" encoding="iso-8859-1"?>
2<!DOCTYPE article PUBLIC "-//FreeBSD//DTD DocBook XML V5.0-Based Extension//EN"
3  "http://www.FreeBSD.org/XML/share/xml/freebsd50.dtd" [
4<!ENTITY % release PUBLIC "-//FreeBSD//ENTITIES Release Specification//EN"
5  "http://www.FreeBSD.org/release/XML/release.ent">
6%release;
7<!ENTITY security SYSTEM "../../share/xml/security.xml">
8<!ENTITY errata SYSTEM "../../share/xml/errata.xml">
9]>
10
11<article xmlns="http://docbook.org/ns/docbook"
12  xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0">
13
14  <info>
15    <title>&os; &release.prev; Errata </title>
16
17    <author><orgname>The &os; Project</orgname></author>
18
19    <pubdate>$FreeBSD: stable/10/release/doc/en_US.ISO8859-1/errata/article.xml 278267 2015-02-05 16:28:18Z gjb $</pubdate>
20
21    <copyright>
22      <year>2015</year>
23
24      <holder role="mailto:doc@FreeBSD.org">The &os; Documentation
25	Project</holder>
26    </copyright>
27
28    <legalnotice xml:id="trademarks" role="trademarks">
29      &tm-attrib.freebsd;
30      &tm-attrib.intel;
31      &tm-attrib.sparc;
32      &tm-attrib.general;
33    </legalnotice>
34
35    <abstract>
36      <para>This document lists errata items for &os; &release.prev;,
37	containing significant information discovered after the
38	release or too late in the release cycle to be otherwise
39	included in the release documentation.  This information
40	includes security advisories, as well as news relating to the
41	software or documentation that could affect its operation or
42	usability.  An up-to-date version of this document should
43	always be consulted before installing this version of
44	&os;.</para>
45
46      <para>This errata document for &os; &release.prev; will be
47	maintained until the release of &os; &release.next;.</para>
48    </abstract>
49  </info>
50
51  <sect1 xml:id="intro">
52    <title>Introduction</title>
53
54    <para>This errata document contains <quote>late-breaking
55	news</quote> about &os; &release.prev; Before installing this
56      version, it is important to consult this document to learn about
57      any post-release discoveries or problems that may already have
58      been found and fixed.</para>
59
60    <para>Any version of this errata document actually distributed
61      with the release (for example, on a CDROM distribution) will be
62      out of date by definition, but other copies are kept updated on
63      the Internet and should be consulted as the <quote>current
64	errata</quote> for this release.  These other copies of the
65      errata are located at <link
66	xlink:href="http://www.FreeBSD.org/releases/" />, plus any
67      sites which keep up-to-date mirrors of this location.</para>
68
69    <para>Source and binary snapshots of &os; &release.branch; also
70      contain up-to-date copies of this document (as of the time of
71      the snapshot).</para>
72
73    <para>For a list of all &os; CERT security advisories, see <link
74	xlink:href="http://www.FreeBSD.org/security/"/> or <link
75      xlink:href="ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/"/>.</para>
76  </sect1>
77
78  <sect1 xml:id="security">
79    <title>Security Advisories</title>
80
81    &security;
82  </sect1>
83
84  <sect1 xml:id="errata">
85    <title>Errata Notices</title>
86
87    &errata;
88  </sect1>
89
90  <sect1 xml:id="open-issues">
91    <title>Open Issues</title>
92
93    <itemizedlist>
94      <listitem>
95	<para>&os;/&arch.i386; &release.prev; running as a guest
96	  operating system on <application>VirtualBox</application>
97	  can have a problem with disk I/O access.  It depends on some
98	  specific hardware configuration and does not depend on a
99	  specific version of <application>VirtualBox</application> or
100	  host operating system.</para>
101
102	<para>It causes various errors and makes &os; quite unstable.
103	  Although the cause is still unclear, disabling unmapped I/O
104	  works as a workaround.  To disable it, choose
105	  <literal>Escape to loader prompt</literal> in the boot menu
106	  and enter the following lines from &man.loader.8; prompt,
107	  after an <literal>OK</literal>:</para>
108
109	<screen>set vfs.unmapped_buf_allowed=0
110boot</screen>
111
112	<para>Note that the following line has to be added to
113	  <filename>/boot/loader.conf</filename> after a boot.  It
114	  disables unmapped I/O at every boot:</para>
115
116	<programlisting>vfs.unmapped_buf_allowed=0</programlisting>
117
118	<para>[2014-04-03 update]  It has been reported that
119	  instability may be present on virtual machines running
120	  on other hypervisors, such as Xen or KVM.</para>
121      </listitem>
122    </itemizedlist>
123  </sect1>
124
125  <sect1 xml:id="late-news">
126    <title>Late-Breaking News</title>
127
128    <para>No news.</para>
129  </sect1>
130</article>
131