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Document an error in the release notes regarding revision r282199.
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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>$FreeBSD$</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 has been reported that instability may be present on
103           virtual machines running on other hypervisors, such as Xen
104           or KVM.</para>
105
106         <para>It causes various errors and makes &os; quite unstable.
107           Although the cause is still unclear, disabling unmapped I/O
108           works as a workaround.  To disable it, choose
109           <literal>Escape to loader prompt</literal> in the boot menu
110           and enter the following lines from &man.loader.8; prompt,
111           after an <literal>OK</literal>:</para>
112
113         <screen>set vfs.unmapped_buf_allowed=0
114 boot</screen>
115
116         <para>Note that the following line has to be added to
117           <filename>/boot/loader.conf</filename> after a boot.  It
118           disables unmapped I/O at every boot:</para>
119
120         <programlisting>vfs.unmapped_buf_allowed=0</programlisting>
121       </listitem>
122
123       <listitem>
124         <para>&os;/&arch.i386;&nbsp;&release.prev; installed on ZFS
125           may crash during boot when the ZFS pool mount is attempted
126           while booting an unmodified <literal>GENERIC</literal>
127           kernel.</para>
128
129         <para>As described in <filename>/usr/src/UPDATING</filename>
130           entry <literal>20121223</literal>, rebuilding the kernel
131           with <literal>options KSTACK_PAGES=4</literal> has been
132           observed to resolve the boot-time crash.  This, however, is
133           not an ideal solution for inclusion in the
134           <literal>GENERIC</literal> kernel configuration, as
135           increasing <literal>KSTACK_PAGES</literal> implicitly
136           decreases available usermode threads in an environment that
137           is already resource-starved.</para>
138
139         <para>Taking into account the heavy resource requirements of
140           ZFS, in addition to the &arch.i386;-specific tuning
141           requirements for general workloads, using ZFS with the
142           &os;/&arch.i386;&nbsp;<literal>GENERIC</literal> kernel
143           is strongly discouraged.</para>
144
145         <para>If installing &os;/&arch.i386; on ZFS, it is possible to
146           configure the system after installation to increase the
147           <literal>KSTACK_PAGES</literal>.</para>
148
149         <para>When prompted by &man.bsdinstall.8; to perform
150           additional post-installation configuration to the system,
151           select <guibutton>[&nbsp;YES&nbsp;]</guibutton>.</para>
152
153         <para>This procedure requires the system sources available
154           locally.  If the <literal>System source code</literal>
155           distribution was not selected during installation, it can
156           be obtained using <application>svnlite</application>:</para>
157
158         <screen>&prompt.root; mkdir -p /usr/src
159 &prompt.root; svnlite co svn://svn.freebsd.org/base/releng/10.2 /usr/src</screen>
160
161         <para>Build the <literal>kernel-toolchain</literal> required
162           to rebuild the kernel:</para>
163
164         <screen>&prompt.root; make -C /usr/src kernel-toolchain</screen>
165
166         <para>Next, create a kernel configuration file to increase the
167           <literal>KSTACK_PAGES</literal> option:</para>
168
169         <screen>&prompt.root; printf "include GENERIC\noptions KSTACK_PAGES=4\n" &gt; <filename>/usr/src/sys/i386/conf/<replaceable>ZFS</replaceable></filename></screen>
170
171         <para>Then build and install the
172           <replaceable>ZFS</replaceable> kernel:</para>
173
174         <screen>&prompt.root; make -C /usr/src buildkernel KERNCONF=<replaceable>ZFS</replaceable>
175 &prompt.root; make -C /usr/src installkernel KERNCONF=<replaceable>ZFS</replaceable></screen>
176
177         <warning>
178           <para>It is extremely important to take note that, by
179             default, &man.freebsd-update.8; will install the
180             <literal>GENERIC</literal> kernel configuration, and
181             as such, &man.freebsd-update.8; consumers are strongly
182             encouraged to avoid &os;-provided kernel binary upgrades
183             with such configurations.</para>
184         </warning>
185       </listitem>
186
187       <listitem>
188         <para>Due to an incompatibility between &man.bsdconfig.8;
189           and &man.pkg.8;, packages included on the &os;&nbsp;dvd
190           installer will not be recognized by
191           &man.bsdconfig.8;.</para>
192
193         <para>To install packages from the <literal>dvd1.iso</literal>
194           installer, create the <filename
195             class="directory">/dist</filename> target directory, and
196           manually mount the <literal>dvd1.iso</literal>
197           <acronym>ISO</acronym>:</para>
198
199         <screen>&prompt.root; mkdir -p /dist
200 &prompt.root; mount -t cd9660 /dev/<replaceable>cd0</replaceable> /dist</screen>
201
202         <note>
203           <para>Be sure to use the correct <filename
204               class="directory">/dev</filename> device path for the
205             <literal>dvd1.iso</literal> <acronym>ISO</acronym>
206             installer.</para>
207         </note>
208
209         <para>Next, set <envar>REPOS_DIR</envar> to the path of the
210           <filename class="directory">repos/</filename> directory
211           within the installer so &man.pkg.8; will use the correct
212           repository metadata.</para>
213
214         <para>If using &man.sh.1;:</para>
215
216         <screen>&prompt.root; export REPOS_DIR=/dist/packages/repos</screen>
217
218         <para>If using &man.csh.1;:</para>
219
220         <screen>&prompt.root; setenv REPOS_DIR /dist/packages/repos</screen>
221
222         <note>
223           <para>Keep in mind that <envar>REPOS_DIR</envar> will need
224             to be set again after the current shell session is
225             terminated, if continuing to use the packages provided on
226             the <literal>dvd1.iso</literal> installer.</para>
227         </note>
228
229         <para>Finally, bootstrap &man.pkg.8; from the
230           <acronym>ISO</acronym>, and install required
231           packages:</para>
232
233         <screen>&prompt.root; pkg bootstrap
234 &prompt.root; pkg install <replaceable>xorg-server</replaceable> <replaceable>xorg</replaceable> <replaceable>gnome3</replaceable> [...]</screen>
235       </listitem>
236
237       <listitem>
238         <para>An issue was discovered where the &man.netstat.1;
239           <literal>-s</literal> option will cause a segmentation fault
240           on systems with <literal>IPSEC</literal> compiled into the
241           kernel.  The issue was resolved in the
242           <literal>stable/10</literal> branch, and an Errata Notice is
243           planned after &release.prev; is released.</para>
244       </listitem>
245
246       <listitem>
247         <para>An issue was discovered that causes &man.make.1; to
248           generate noisy output when doing source-based upgrades from
249           &os; 9.3 and earlier.  The issue was reported in PR 202277,
250           and after investigation and determining the issue does not
251           cause source-based upgrades to fail, a post-release Errata
252           Notice is planned.</para>
253       </listitem>
254
255       <listitem>
256         <para>An issue with &os; virtual machines with
257           <application>vagrant</application> was discovered that
258           affects the <application>VirtualBox</application> where the
259           virtual machine will not start on the initial boot invoked
260           with <literal>vagrant up</literal>.</para>
261
262         <para>The issue is due to the virtual machine
263           <acronym>MAC</acronym> being unset, as &os; does not provide
264           a default <filename>Vagrantfile</filename>.</para>
265
266         <para>It has been observed, however, that a subsequent
267           invocation of <literal>vagrant up</literal> will allow the
268           virtual machine to successfully boot, allowing access via
269           <literal>vagrant ssh</literal>.</para>
270       </listitem>
271
272       <listitem>
273         <para>[2015-08-16] An error was discovered in the release
274           notes for &os; &release.prev; regarding the
275           <literal>drm</literal> device driver.  The entry for r282199
276           states the driver was updated to match the version &linux;
277           3.8.13 version, however the entry should have noted the
278           change affects device-independent code, and does not bring
279           the <literal>drm</literal> driver fully in line with the
280           stated &linux; version.</para>
281       </listitem>
282     </itemizedlist>
283   </sect1>
284
285   <sect1 xml:id="late-news">
286     <title>Late-Breaking News</title>
287
288     <para>No news.</para>
289   </sect1>
290 </article>