release/doc/en_US.ISO8859-1/relnotes/article.xml

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   4 <!ENTITY % release PUBLIC "-//FreeBSD//ENTITIES Release Specification//EN" "release.ent">
   5  %release;
   6 <!ENTITY % sponsor PUBLIC "-//FreeBSD//ENTITIES Sponsor Specification//EN" "sponsor.ent">
   7  %sponsor;
   8 <!ENTITY % vendor PUBLIC "-//FreeBSD//ENTITIES Vendor Specification//EN" "vendor.ent">
   9  %vendor;
  10 <!ENTITY security SYSTEM "../../share/xml/security.xml">
  11 <!ENTITY errata SYSTEM "../../share/xml/errata.xml">
  12 ]>
  13 <article xmlns="http://docbook.org/ns/docbook"
  14   xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0">
  15
  16   <info>
  17     <title>&os; &release.current; Release Notes</title>
  18
  19     <author>
  20       <orgname>The &os; Project</orgname>
  21     </author>
  22
  23     <pubdate>$FreeBSD$</pubdate>
  24
  25     <!-- Last rev: 282482 -->
  26
  27     <copyright>
  28       <year>2015</year>
  29       <holder role="mailto:doc@FreeBSD.org">The &os; Documentation
  30         Project</holder>
  31     </copyright>
  32
  33     <legalnotice xml:id="trademarks" role="trademarks">
  34       &tm-attrib.freebsd;
  35       &tm-attrib.ibm;
  36       &tm-attrib.ieee;
  37       &tm-attrib.intel;
  38       &tm-attrib.sparc;
  39       &tm-attrib.general;
  40     </legalnotice>
  41
  42     <abstract>
  43       <para>The release notes for &os; &release.current; contain
  44         a summary of the changes made to the &os; base system on the
  45         &release.branch; development line.  This document lists
  46         applicable security advisories that were issued since the last
  47         release, as well as significant changes to the &os; kernel and
  48         userland.  Some brief remarks on upgrading are also
  49         presented.</para>
  50     </abstract>
  51   </info>
  52
  53   <sect1 xml:id="intro">
  54     <title>Introduction</title>
  55
  56     <para>This document contains the release notes for &os;
  57       &release.current;.  It describes recently added, changed, or
  58       deleted features of &os;.  It also provides some notes on
  59       upgrading from previous versions of &os;.</para>
  60
  61     <para releasetype="current">The &release.type; distribution to
  62       which these release notes apply represents the latest point
  63       along the &release.branch; development branch since
  64       &release.branch; was created.  Information regarding pre-built,
  65       binary &release.type; distributions along this branch can be
  66       found at <uri
  67         xlink:href="&release.url;">&release.url;</uri>.</para>
  68
  69     <para releasetype="snapshot">The &release.type; distribution to
  70       which these release notes apply represents a point along the
  71       &release.branch; development branch between &release.prev; and
  72       the future &release.next;.  Information regarding pre-built,
  73       binary &release.type; distributions along this branch can be
  74       found at <uri
  75         xlink:href="&release.url;">&release.url;</uri>.</para>
  76
  77     <para releasetype="release">This distribution of &os;
  78       &release.current; is a &release.type; distribution.  It can be
  79       found at <uri xlink:href="&release.url;">&release.url;</uri> or
  80       any of its mirrors.  More information on obtaining this (or
  81       other) &release.type; distributions of &os; can be found in the
  82       <link
  83         xlink:href="&url.books.handbook;/mirrors.html"><quote>Obtaining
  84           &os;</quote> appendix</link> to the <link
  85         xlink:href="&url.books.handbook;/">&os;
  86         Handbook</link>.</para>
  87
  88     <para>All users are encouraged to consult the release errata
  89       before installing &os;.  The errata document is updated with
  90       <quote>late-breaking</quote> information discovered late in the
  91       release cycle or after the release.  Typically, it contains
  92       information on known bugs, security advisories, and corrections
  93       to documentation.  An up-to-date copy of the errata for &os;
  94       &release.current; can be found on the &os; Web site.</para>
  95
  96     <para>This document describes the most user-visible new or changed
  97       features in &os; since &release.prev;.  In general, changes
  98       described here are unique to the &release.branch; branch unless
  99       specifically marked as &merged; features.</para>
 100
 101     <para>Typical release note items document recent security
 102       advisories issued after &release.prev;, new drivers or hardware
 103       support, new commands or options, major bug fixes, or
 104       contributed software upgrades.  They may also list changes to
 105       major ports/packages or release engineering practices.  Clearly
 106       the release notes cannot list every single change made to &os;
 107       between releases; this document focuses primarily on security
 108       advisories, user-visible changes, and major architectural
 109       improvements.</para>
 110   </sect1>
 111
 112   <sect1 xml:id="upgrade">
 113     <title>Upgrading from Previous Releases of &os;</title>
 114
 115     <para arch="amd64,i386">Binary upgrades between RELEASE versions
 116       (and snapshots of the various security branches) are supported
 117       using the &man.freebsd-update.8; utility.  The binary upgrade
 118       procedure will update unmodified userland utilities, as well as
 119       unmodified GENERIC kernels distributed as a part of an official
 120       &os; release.  The &man.freebsd-update.8; utility requires that
 121       the host being upgraded have Internet connectivity.</para>
 122
 123     <para>Source-based upgrades (those based on recompiling the &os;
 124       base system from source code) from previous versions are
 125       supported, according to the instructions in
 126       <filename>/usr/src/UPDATING</filename>.</para>
 127
 128     <important>
 129       <para>Upgrading &os; should only be attempted after backing up
 130         <emphasis>all</emphasis> data and configuration files.</para>
 131     </important>
 132   </sect1>
 133
 134   <sect1 xml:id="security-errata">
 135     <title>Security and Errata</title>
 136
 137     <para>This section lists the various Security Advisories and
 138       Errata Notices since &release.prev;.</para>
 139
 140     <sect2 xml:id="security">
 141       <title>Security Advisories</title>
 142
 143       &security;
 144     </sect2>
 145
 146     <sect2 xml:id="errata">
 147       <title>Errata Notices</title>
 148
 149       &errata;
 150     </sect2>
 151   </sect1>
 152
 153   <sect1 xml:id="userland">
 154     <title>Userland</title>
 155
 156     <para>This section covers changes and additions to userland
 157       applications, contributed software, and system utilities.</para>
 158
 159     <sect2 xml:id="userland-config">
 160       <title>Userland Configuration Changes</title>
 161
 162       <para revision="266463">The default &man.newsyslog.conf.5; now
 163         includes files in the
 164         <filename>/etc/newsyslog.conf.d/</filename> and
 165         <filename>/usr/local/etc/newsyslog.conf.d/</filename>
 166         directories by default for &man.newsyslog.8;.</para>
 167
 168       <para revision="270675">The &man.mailwrapper.8; utility has been
 169         updated to use &man.mailer.conf.5; from the
 170         <literal>LOCALBASE</literal> environment variable, which
 171         defaults to <filename class="directory">/usr/local</filename>
 172         if unset.</para>
 173
 174       <para revision="272350">The <literal>MK_ARM_EABI</literal>
 175         &man.src.conf.5; option has been removed.</para>
 176     </sect2>
 177
 178     <sect2 xml:id="userland-programs">
 179       <title>Userland Application Changes</title>
 180
 181       <para revision="258838" contrib="sponsor" sponsor="&ff;,
 182         &google;" sponsorurl="">The &man.casperd.8; daemon has been
 183         added, which provides access to functionality that is not
 184         available in the <quote>capability mode</quote>
 185         sandbox.</para>
 186
 187       <para revision="260594">When unable to load a kernel module with
 188         &man.kldload.8;, a message informing to view output of
 189         &man.dmesg.8; is now printed, opposed to the previous output
 190         <quote>Exec format error.</quote>.</para>
 191
 192       <para revision="260910">Allow &man.pciconf.8; to identify PCI
 193         devices that are attached to a driver to be identified by
 194         their device name instead of just the selector.  Additionally,
 195         an optional device argument to the <literal>-l</literal> flag
 196         to restrict the output to only listing details about a single
 197         device.</para>
 198
 199       <para revision="260913">A new flag, <quote>onifconsole</quote>
 200         has been added to <filename>/etc/ttys</filename>.  This allows
 201         the system to provide a login prompt via serial console if the
 202         device is an active kernel console, otherwise it is equivalent
 203         to <literal>off</literal>.</para>
 204
 205       <para revision="260926">Support for displaying VPD for PCI
 206         devices via &man.pciconf.8; has been added.</para>
 207
 208       <para revision="261498">&man.ping.8; protects against malicious
 209         network packets using the Capsicum framework to drop
 210         privileges.</para>
 211
 212       <para revision="265229">The &man.ps.1; utility has been
 213         updated to include the <literal>-J</literal> flag, used to
 214         filter output by matching &man.jail.8; IDs and names.
 215         Additionally, argument <literal>0</literal> can be used to
 216         <literal>-J</literal> to only list processes running on the
 217         host system.</para>
 218
 219       <para revision="265249">The &man.top.1; utility has been updated
 220         to filter by &man.jail.8; ID or name, in followup to the
 221         &man.ps.1; change in <literal>r265229</literal>.</para>
 222
 223       <para revision="265995">The Blowfish &man.crypt.3; default
 224         format has been changed to
 225         <literal>&dollar;2b&dollar;</literal>.</para>
 226
 227       <para revision="266209">The &man.pmcstat.8; utility has been
 228         updated to include a new flag, <literal>-l</literal>, which
 229         ends event collection after the specified number of
 230         seconds.</para>
 231
 232       <para revision="270745">The &man.ps.1; utility has been updated
 233         to include a new keyword, <quote>tracer</quote>, which
 234         displays the <acronym>PID</acronym> of the tracing
 235         process.</para>
 236
 237       <para revision="271482">Support for adding empty partitions has
 238         been added to the &man.mkimg.1; utility.</para>
 239
 240       <para revision="272166">The &man.primes.6; utility has been
 241         updated to correctly enumerate prime numbers between
 242         <literal>4295098369</literal> and
 243         <literal>3825123056546413050</literal>, which prior to this
 244         change, it would be possible for returned values to be
 245         incorrectly identified as prime numbers.</para>
 246
 247       <para revision="272198">The &man.mkimg.1; utility has been
 248         updated to include three options used to print information
 249         about &man.mkimg.1; itself:</para>
 250
 251       <informaltable frame="none" pgwide="0">
 252         <tgroup cols="2">
 253           <colspec colwidth="1*"/>
 254           <colspec colwidth="1*"/>
 255           <thead>
 256             <row>
 257               <entry>Option</entry>
 258               <entry>Output</entry>
 259             </row>
 260           </thead>
 261
 262           <tbody>
 263             <row>
 264               <entry><literal>--version</literal></entry>
 265               <entry>The current version of the &man.mkimg.1;
 266                 utility</entry>
 267             </row>
 268
 269             <row>
 270               <entry><literal>--formats</literal></entry>
 271               <entry>The disk image file formats supported by
 272                 &man.mkimg.1;</entry>
 273             </row>
 274
 275             <row>
 276               <entry><literal>--schemes</literal></entry>
 277               <entry>The partition schemes supported by
 278                 &man.mkimg.1;</entry>
 279             </row>
 280           </tbody>
 281         </tgroup>
 282       </informaltable>
 283
 284       <para revision="272488">Userland &man.ctf.5; support in
 285         &man.dtrace.1; has been added.  With this change,
 286         &man.dtrace.1; is able to resolve type info for function and
 287         <acronym>USDT</acronym> probe arguments, and function return
 288         values.</para>
 289
 290       <para revision="274960">The &man.elfdump.1; utility has been
 291         updated to support capability mode provided by
 292         &man.capsicum.4;.</para>
 293
 294       <para revision="275680" contrib="sponsor" sponsor="&ff;">The
 295         &man.fstyp.8; utility has been added, which is used to
 296         determine the filesystem on a specified device.</para>
 297
 298       <para revision="276881">The <literal>libedit</literal> library
 299         has been updated to support <acronym>UTF</acronym>-8, which
 300         additionally provides unicode support to &man.sh.1;.</para>
 301
 302       <para revision="277166" arch="powerpc">The &man.ptrace.2; system
 303         call has been updated include support for Altivec registers on
 304         &os;/&arch.powerpc;.</para>
 305
 306       <para revision="278320">A new device control utility,
 307         &man.devctl.8; has been added, which allows making
 308         administrative changes to individual devices, such as
 309         attaching and detaching drivers, and enabling and disabling
 310         devices.  The &man.devctl.8; utility uses the new
 311         &man.devctl.3; library.</para>
 312
 313       <para revision="279315" contrib="sponsor" sponsor="&ff;">The
 314         &man.uefisign.8; utility has been added.</para>
 315
 316       <para revision="279571" contrib="sponsor"
 317         sponsor="&scaleengine;">The &man.freebsd-update.8; utility has
 318         been updated to prevent fetching updated binary patches when
 319         a previous upgrade has not been thoroughly completed.</para>
 320
 321       <para revision="279122" contrib="sponsor"
 322         sponsor="&juniper;">The &man.netstat.1; utility has been
 323         updated to link against the &man.libxo.3; shared
 324         library.</para>
 325
 326       <para revision="280870">A regression in the &man.libarchive.3;
 327         library that would prevent a directory from being included in
 328         the archive when <literal>--one-file-system</literal> is used
 329         has been fixed.</para>
 330
 331       <para revision="281311" contrib="sponsor" sponsor="&ff;">The
 332         &man.ar.1; utility has been updated to set
 333         <literal>ARCHIVE_EXTRACT_SECURE_SYMLINKS</literal> and
 334         <literal>ARCHIVE_EXTRACT_SECURE_NODOTDOT</literal> to disallow
 335         directory traversal when extracting an archive, similar to
 336         &man.tar.1;.</para>
 337
 338       <para revision="282208" contrib="sponsor"
 339         sponsor="&multiplay;">The &man.chflags.1;, &man.chgrp.1;,
 340         &man.chmod.1;, and &man.chown.8; utilities now affect symbolic
 341         links when the <literal>-R</literal> flag is specified, as
 342         documented in &man.symlink.7;.</para>
 343
 344       <para revision="281617">A race condition in &man.wc.1; that
 345         would cause final results to be sent to &man.stderr.4; when
 346         receiving the <literal>SIGINFO</literal> signal has been
 347         fixed.</para>
 348     </sect2>
 349
 350     <sect2 xml:id="userland-contrib">
 351       <title>Contributed Software</title>
 352
 353       <para revision="258884" contrib="sponsor"
 354         sponsor="&darpa_afrl;">&man.lldb.1; has been updated to
 355         upstream snapshot version r196259.</para>
 356
 357       <para revision="259626">Timezone data files have been updated to
 358         version 2013i.</para>
 359
 360       <para revision="260445">&man.byacc.1; has been updated to
 361         version 20140101.</para>
 362
 363       <para revision="261071">&man.jemalloc.3; has been updated to
 364         version 3.5.0.</para>
 365
 366       <para revision="261283"><application>libc++</application> has
 367         been updated to version 3.4.</para>
 368
 369       <para revision="261320"><application>OpenSSH</application> has
 370         been updated to 6.5p1.</para>
 371
 372       <para revision="261344"><application>mdocml</application> has
 373         been updated to version 1.12.3.</para>
 374
 375       <para revision="261991"><application>LLVM</application> and
 376         <application>Clang</application> have been updated to
 377         version 3.4.</para>
 378
 379       <para revision="266527"
 380         role="merged"><application>Sendmail</application> has been
 381         updated from 8.14.7 to 8.14.9.</para>
 382
 383       <para revision="276577"><application>file</application> has been
 384         updated to version 5.22.</para>
 385
 386       <para revision="275718">The <application>binutils</application>
 387         suite of utilities has been updated to include upstream
 388         patches that add new relocations for &arch.powerpc;
 389         support.</para>
 390
 391       <para revision="276398" contrib="sponsor" sponsor="&ff;">The
 392         <application>ELF Tool Chain</application> has been updated to
 393         upstream revision r3136.</para>
 394
 395       <para revision="276551">The <application>texinfo</application>
 396         utility and <literal>info</literal> pages were removed from
 397         the base system.  The <filename
 398           role="package">print/texinfo</filename> port should be
 399         installed on systems where <literal>info</literal> pages are
 400         needed.</para>
 401
 402       <para revision="276796" contrib="sponsor" sponsor="&ff;">The ELF
 403         object manipulation tools
 404         <application>addr2line</application>,
 405         <application>elfcopy (strip)</application>,
 406         <application>nm</application>,
 407         <application>readelf</application>,
 408         <application>size</application>, and
 409         <application>strings</application> were switched to the
 410         versions from the ELF Tool Chain project.</para>
 411
 412       <para revision="276881">The <literal>libedit</literal> library
 413         has been updated to include <acronym>UTF-8</acronym> support,
 414         adding <acronym>UTF-8</acronym> support to the &man.sh.1;
 415         shell.</para>
 416
 417       <para revision="278433">The &man.xz.1; utility has been updated
 418         to support multi-threaded compression.</para>
 419
 420       <para revision="280297"><application>OpenSSL</application> has
 421         been updated to version 1.0.1m.</para>
 422
 423       <para revision="280932" contrib="sponsor" sponsor="&ff;">The
 424         <application>elftoolchain</application> utilities have been
 425         updated to version 3179.</para>
 426
 427       <para revision="281316">The &man.xz.1; utility has been updated
 428         to version 5.2.1.</para>
 429
 430       <para revision="281373">The &man.nvi.1; utility has been updated
 431         to version 2.1.3.</para>
 432
 433       <para revision="281396">The &man.acpi.4; subsystem has been
 434         updated to version 20150410.</para>
 435
 436       <para revision="281806">The &man.wpa.supplicant.8; and
 437         &man.hostapd.8; utilities have been updated to version
 438         2.4.</para>
 439
 440       <para revision="281812"><application>bmake</application> has
 441         been updated to version 20150418.</para>
 442
 443       <para revision="282089">The &man.unbound.8; utility has been
 444         updated to version 1.5.3.</para>
 445
 446       <para revision="282434" contrib="sponsor" sponsor="&ff;">The
 447         &man.resolvconf.8; utility has been updated to version
 448         3.7.0.</para>
 449     </sect2>
 450
 451     <sect2 xml:id="userland-installer">
 452       <title>Installation and Configuration Tools</title>
 453
 454       <para revision="271539">The &man.bsdinstall.8; partition editor
 455         and &man.sade.8; utility have been updated to include native
 456         <acronym>ZFS</acronym> support.</para>
 457
 458       <para revision="272274">The &os; installation utility,
 459         &man.bsdinstall.8;, has been updated to set the
 460         <literal>canmount</literal> &man.zfs.8; property to
 461         <literal>off</literal> for the <filename
 462           class="directory">/var</filename> dataset, preventing the
 463         contents of directories within <filename
 464           class="directory">/var</filename> from conflicting when
 465         using multiple boot environments, such as that provided by
 466         <filename role="package">sysutils/beadm</filename>.</para>
 467
 468       <para revision="274394">The &man.bsdconfig.8; utility has been
 469         updated to skip the initial &man.tzsetup.8;
 470         <acronym>UTC</acronym> versus wall-clock time prompt when run
 471         in a virtual machine, determined when the
 472         <literal>kern.vm_guest</literal> &man.sysctl.8; is set to
 473         <literal>1</literal>.</para>
 474
 475       <para revision="275874">The &man.bsdinstall.8; utility has been
 476         updated to use the new &man.dpv.3; library to display progress
 477         when extracting the &os; distributions.</para>
 478     </sect2>
 479
 480     <sect2 xml:id="userland-rc">
 481       <title><filename class="directory">/etc/rc.d</filename>
 482         Scripts</title>
 483
 484       <para revision="270676">The &man.rc.8; subsystem has been
 485         updated to allow configuring services in <filename
 486           class="directory">&dollar;{LOCALBASE}/etc/rc.conf.d/</filename>.
 487         If <literal>LOCALBASE</literal> is unset, it defaults to
 488         <filename class="directory">/usr/local</filename>.</para>
 489
 490       <para revision="275299">The <filename>mrouted</filename>
 491         &man.rc.8; script has been removed from the base system.  An
 492         equivalent script is available from the <filename
 493           role="package">net/mrouted</filename> port.</para>
 494
 495       <para revision="279463" contrib="sponsor"
 496         sponsor="&sandvine;">A new &man.rc.8; script,
 497         <filename>iovctl</filename>, has been added, which allows
 498         automatically starting the &man.iovctl.8; utility at
 499         boot.</para>
 500     </sect2>
 501
 502     <sect2 xml:id="userland-periodic">
 503       <title><filename class="directory">/etc/periodic</filename>
 504         Scripts</title>
 505
 506       <para revision="271321">The daily &man.periodic.8; script
 507         <filename>110.clean-tmps</filename> has been updated to avoid
 508         crossing filesystem mount boundaries when cleaning files in
 509         <filename class="directory">/tmp</filename>.</para>
 510     </sect2>
 511
 512     <sect2 xml:id="userland-libraries">
 513       <title>Runtime Libraries and API</title>
 514
 515       <para revision="268461">The &man.readline.3; library is now
 516         statically linked in software within the base system, and the
 517         shared library is no longer installed, allowing the Ports
 518         Collection to use a modern version of the library.</para>
 519
 520       <para revision="272273">The &man.strptime.3; library has been
 521         updated to add support for <acronym>POSIX</acronym>-2001
 522         features <literal>%U</literal> and
 523         <literal>%W</literal>.</para>
 524
 525       <para revision="272842,272848" contrib="sponsor"
 526         sponsor="&ff;">The &man.dl.iterate.phdr.3; library has been
 527         changed to always return the path name of the
 528         <acronym>ELF</acronym> object in the
 529         <literal>dlpi_name</literal> structure member.</para>
 530
 531       <para revision="273562" contrib="sponsor"
 532         sponsor="&juniper;">The &man.libxo.3; library has been
 533         imported to the base system.</para>
 534
 535       <para revision="273806" contrib="sponsor" sponsor="&chelsio;">A
 536         userland library for Chelsio Terminator 5 based iWARP cards
 537         has been added, allowing userland <acronym>RDMA</acronym>
 538         applications to work over compatible
 539         <acronym>NIC</acronym>s.</para>
 540
 541       <para revision="274987">The &man.gpio.3; library has been added,
 542         providing a wrapper around the &man.gpio.4; kernel
 543         interface.</para>
 544
 545       <para revision="277610">The <literal>futimens()</literal> and
 546         <literal>utimensat()</literal> system calls have been
 547         added.  See &man.utimensat.2; for more information.</para>
 548
 549       <para revision="278934">The &man.elf.3; compile-time dependency
 550         has been removed from <filename>dtri.o</filename>, which
 551         allows adding <application>DTrace</application> probes to
 552         userland applications and libraries without also linking
 553         against &man.elf.3;.</para>
 554
 555       <para revision="279186">The &man.setmode.3; function has been
 556         updated to consistently set <literal>errno</literal> on
 557         failure.</para>
 558
 559       <para revision="279663">The &man.qsort.3; functions have been
 560         updated to be able to handle 32-bit aligned data on 64-bit
 561         platforms, also providing a significant improvement in 32-bit
 562         workloads.</para>
 563
 564       <para revision="281130">Several standard include headers have
 565         been updated to use of <application>gcc</application>
 566         attributes, such as <literal>__result_use_check()</literal>,
 567         <literal>__alloc_size()</literal>, and
 568         <literal>__nonnull()</literal>.</para>
 569
 570       <para revision="281845">Support for file verification in
 571         <acronym>MAC</acronym> has been added.</para>
 572     </sect2>
 573
 574     <sect2 xml:id="userland-abi">
 575       <title>ABI Compatibility</title>
 576
 577       <para revision="271982">The &linux; compatibility version has
 578         been updated to <literal>2.6.18</literal>.  The
 579         <literal>compat.linux.osrelease</literal> &man.sysctl.8; is
 580         evaluated when building the <filename
 581           role="package">emulators/linux-c6</filename> and related
 582         ports.</para>
 583     </sect2>
 584   </sect1>
 585
 586   <sect1 xml:id="kernel">
 587     <title>Kernel</title>
 588
 589     <para>This section covers changes to kernel configurations, system
 590       tuning, and system control parameters that are not otherwise
 591       categorized.</para>
 592
 593     <sect2 xml:id="kernel-bugfix">
 594       <title>Kernel Bug Fixes</title>
 595
 596       <para revision="265876">A kernel bug that inhibited proper
 597         functionality of the <literal>dev.cpu.0.freq</literal>
 598         &man.sysctl.8; on &intel; processors with Turbo
 599         Boost&nbsp;&trade; enabled has been fixed.</para>
 600
 601       <para revision="271697" arch="powerpc">Support for
 602         &man.dtrace.1; stack tracing has been fixed for
 603         &os;/&arch.powerpc;, using the <literal>trapexit()</literal>
 604         and <literal>asttrapexit()</literal> functions instead of
 605         checking within addressed kernel space.</para>
 606
 607       <para revision="272089">A bug in &man.ipfw.4; that could
 608         potentially lead to a kernel panic when using &man.dummynet.4;
 609         at layer 2 has been fixed.</para>
 610
 611       <para revision="280930" contrib="sponsor" sponsor="&mitail;">The
 612         kernel <acronym>RPC</acronym> has been updated to include
 613         several enhancements:</para>
 614
 615       <itemizedlist>
 616         <listitem>
 617           <para>The 45 MiB limit on requests queued for
 618             &man.nfsd.8; threads has been removed.</para>
 619         </listitem>
 620
 621         <listitem>
 622           <para>Avoids unnecessary throttling by not deferring
 623             accounting for completed requests.</para>
 624         </listitem>
 625
 626         <listitem>
 627           <para>Fixes an integer overflow and signedness bugs.</para>
 628         </listitem>
 629       </itemizedlist>
 630
 631       <para revision="281261" arch="powerpc">Support for
 632         &man.dtrace.1; has been added for the
 633         Book-E&nbsp;&trade;.</para>
 634     </sect2>
 635
 636     <sect2 xml:id="kernel-config">
 637       <title>Kernel Configuration</title>
 638
 639       <para revision="266531">The <literal>IMAGACT_BINMISC</literal>
 640         kernel configuration option has been enabled by default,
 641         which enables application execution through emulators, such
 642         as <application>Qemu</application>.</para>
 643
 644       <para revision="268045">The <literal>VT</literal> kernel
 645         configuration file has been removed, and the &man.vt.4;
 646         driver is included in the <literal>GENERIC</literal> kernel.
 647         To enable &man.vt.4;, enter <literal>set kern.vty=vt</literal>
 648         at the &man.loader.8; prompt during boot, or add
 649         <literal>kern.vty=vt</literal> to &man.loader.conf.5; and
 650         reboot the system.</para>
 651
 652       <para revision="277904">The &man.config.8; utility has been
 653         updated to allow using a non-standard <filename
 654           class="directory">src/</filename> tree, specified as an
 655         argument to the <literal>-s</literal> flag.</para>
 656
 657       <para revision="277990" arch="powerpc64">The
 658         &os;/&arch.powerpc64; kernel now builds as
 659         a position-independent executable, allowing the kernel to be
 660         loaded into and run from any physical or virtual
 661         address.</para>
 662
 663       <important>
 664         <para>This change requires an update to &man.loader.8;.
 665           The userland and kernel must be updated before rebooting the
 666           system.</para>
 667       </important>
 668
 669       <para revision="279189" contrib="sponsor" sponsor="&ff;"
 670         arch="powerpc">Kernel support for Vector-Scalar eXtension
 671         (<acronym>VSX</acronym>) found on POWER7 and POWER8 hardware
 672         has been added.</para>
 673
 674       <para revision="279252" contrib="sponsor" sponsor="&ff;"
 675         arch="powerpc">The &man.pmap.9; implementation for 64-bit
 676         &powerpc; processors has been overhaulded to improve
 677         concurrency.</para>
 678     </sect2>
 679
 680     <sect2 xml:id="kernel-sysctl">
 681       <title>System Tuning and Controls</title>
 682
 683       <para revision="275140" contrib="sponsor" sponsor="&ff;">The
 684         &man.hwpmc.4; default and maximum callchain depths have been
 685         increased.  The default has been increased from 16 to 32, and
 686         the maximum increased from 32 to 128.</para>
 687
 688       <para revision="279361">The <literal>kern.osrelease</literal>
 689         and <literal>kern.osreldate</literal> are now configurable
 690         &man.jail.8; parameters.</para>
 691
 692       <para revision="280308,280949" contrib="sponsor"
 693         sponsor="&ix;, &ff;">The &man.devfs.5; device filesystem has
 694         been changed to update timestamps for read/write operations
 695         using seconds precision.  A new &man.sysctl.8;,
 696         <literal>vfs.devfs.dotimes</literal> has been added, which
 697         when set to a non-zero value, enables default precision
 698         timestamps for these operations.</para>
 699
 700       <para revision="282213" contrib="sponsor" sponsor="&ff;">A new
 701         &man.sysctl.8;, <literal>kern.racct.enable</literal>, has been
 702         added, which when set to a non-zero value allows using
 703         &man.rctl.8; with the <literal>GENERIC</literal> kernel.
 704         A new kernel configuration option,
 705         <literal>RACCT_DISABLED</literal> has also been added.</para>
 706     </sect2>
 707   </sect1>
 708
 709   <sect1 xml:id="drivers">
 710     <title>Devices and Drivers</title>
 711
 712     <para>This section covers changes and additions to devices and
 713       device drivers since &release.prev;.</para>
 714
 715     <sect2 xml:id="drivers-device">
 716       <title>Device Drivers</title>
 717
 718       <para revision="260903">Support for GPS ports has been added to
 719         &man.uhso.4;.</para>
 720
 721       <para revision="265132">The &man.full.4; device has been added,
 722         and the <literal>lindev(4)</literal> device has been removed.
 723         Prior to this change, <literal>lindev(4)</literal> provided
 724         only the <filename>/dev/full</filename> character device,
 725         returning <literal>ENOSPC</literal> on write attempts.  As
 726         this device is not specific to &linux;, a native &os; version
 727         has been added.</para>
 728
 729       <para revision="271705">Hardware context support has been
 730         added to the <literal>drm/i915</literal> driver, adding
 731         support for <application>Mesa</application> 9.2 and
 732         later.</para>
 733
 734       <para revision="273178">The &man.vt.4; driver has been updated,
 735         replacing the bitmapped <literal>kern.vt.spclkeys</literal>
 736         &man.sysctl.8; with individual
 737         <literal>kern.vt.kbd_*</literal> variants.</para>
 738
 739       <para revision="273598">The &man.hpet.4; driver has been updated
 740         to create a
 741         <filename>/dev/hpet<replaceable>N</replaceable></filename>
 742         device, providing access to <acronym>HPET</acronym> from
 743         userspace.</para>
 744
 745       <para revision="280183">The <literal>drm</literal> code has
 746         been updated to match &linux; version 3.8.13.</para>
 747
 748       <para revision="282783" arch="powerpc">Support for the Freescale
 749         <acronym>PCI</acronym> Root Complex device has been
 750         added.</para>
 751     </sect2>
 752
 753     <sect2 xml:id="drivers-storage">
 754       <title>Storage Drivers</title>
 755
 756       <para revision="265236" contrib="sponsor"
 757         sponsor="&lsi;, &spectralogic;" sponsorurl="">The &man.mpr.4;
 758         device has been added, providing support for LSI Fusion-MPT
 759         3 12Gb SCSI/SATA controllers.</para>
 760
 761       <para revision="265555" contrib="sponsor"
 762           sponsor="&lsi;">The &man.mrsas.4; driver has been added,
 763         providing support for LSI MegaRAID SAS controllers.  The
 764         &man.mfi.4; driver will attach to the controller, by default.
 765         To enable &man.mrsas.4; add
 766         <literal>hw.mfi.mrsas_enable=1</literal> to
 767         <filename>/boot/loader.conf</filename>, which turns off
 768         &man.mfi.4; device probing.</para>
 769
 770       <note>
 771         <para>At this time, the &man.mfiutil.8; utility and the &os;
 772           version of <application>MegaCLI</application> and
 773           <application>StorCli</application> do not work with
 774           &man.mrsas.4;.</para>
 775       </note>
 776
 777       <para revision="275461" contrib="sponsor" sponsor="&ix;">The
 778         &man.ctl.4; subsystem has been updated, increasing the ports
 779         limit from <literal>128</literal> to <literal>256</literal>,
 780         and <acronym>LUN</acronym> limit from <literal>256</literal>
 781         to <literal>1024</literal>.</para>
 782
 783       <para revision="276526">The <literal>asr(4)</literal> driver has
 784         been removed, and is no longer supported.</para>
 785
 786       <para revision="281387">The &man.hptnr.4; driver has been
 787         updated to version 1.1.1.</para>
 788     </sect2>
 789
 790     <sect2 xml:id="drivers-network">
 791       <title>Network Drivers</title>
 792
 793       <para revision="258830">Support for Broadcom chipsets BCM57764,
 794         BCM57767, BCM57782, BCM57786 and BCM57787 has been added to
 795         &man.bge.4;.</para>
 796
 797       <para revision="260448">Support for the &intel; Centrino&trade;
 798         Wireless-N 135 chipset has been added.</para>
 799
 800       <para revision="260552">Firmware for &intel; Centrino&trade;
 801         Wireless-N 105 devices has been added to the base
 802         system.</para>
 803
 804       <para revision="261975">The deprecated nve(4) driver has been
 805         removed.  Users of NVIDIA nForce MCP network adapters are
 806         advised to use the &man.nfe.4; driver instead, which has been
 807         the default driver for this hardware since
 808         &os;&nbsp;7.0.</para>
 809
 810       <para revision="264601" contrib="sponsor"
 811         sponsor="&darpa_afrl;">The <literal>if_nf10bmac(4)</literal>
 812         device has been added, providing support for NetFPGA-10G
 813         Embedded CPU Ethernet Core.</para>
 814
 815       <note>
 816         <para>The <literal>if_nf10bmac(4)</literal> driver operates on
 817           the FPGA, and is not suited for the PCI host
 818           interface.</para>
 819       </note>
 820
 821       <para revision="265348" contrib="sponsor"
 822         sponsor="&netgate;">The &man.ath.hal.4; driver has been
 823         updated to support the Atheros AR1111 chipset.</para>
 824
 825       <para revision="266770">Support for the &intel; Centrino&trade;
 826         Wireless-N 105 chipset has been added.</para>
 827
 828       <para revision="266757" contrib="sponsor"
 829         sponsor="&chelsio;">Support for the &man.cxgbe.4; Terminator
 830         5 (T5) 10G/40G cards has been added to &man.netmap.4;.</para>
 831
 832       <para revision="272730">The &man.alc.4; driver has been updated
 833         to support AR816x and AR817x ethernet controllers.</para>
 834
 835       <para revision="273331">The &man.vxlan.4; driver has been added,
 836         which creates a virtual Layer 2 (Ethernet) network overlaid in
 837         a Layer 3 (IP/UDP) network.  The &man.vxlan.4; driver is
 838         analogous to &man.vlan.4;, but is designed to be better suited
 839         for large, multiple-tenant datacenter environments.</para>
 840
 841       <para revision="274246" contrib="sponsor" sponsor="&yandex;">The
 842         &man.gre.4; driver has been significantly overhauled, and has
 843         been split into two separate modules, &man.gre.4; and
 844         &man.me.4;.</para>
 845     </sect2>
 846   </sect1>
 847
 848   <sect1 xml:id="hardware">
 849     <title>Hardware Support</title>
 850
 851     <para>This section covers general hardware support for physical
 852       machines, hypervisors, and virtualization environments, as well
 853       as hardware changes and updates that do not otherwise fit in
 854       other sections of this document.</para>
 855
 856     <sect2 xml:id="hardware-support">
 857       <title>Hardware Support</title>
 858
 859       <para revision="268303">The &man.asmc.4; driver has been
 860         updated to support the &apple;&nbsp;MacMini 3,1.</para>
 861
 862       <para revision="268351">Support for &os;/ia64 has been dropped
 863         as of &os;&nbsp;11.</para>
 864
 865       <para revision="274386">An issue that could cause a system to
 866         hang when entering <acronym>ACPI</acronym>
 867         <literal>S3</literal> state (suspend to
 868         <acronym>RAM</acronym>) has been corrected in the &man.acpi.4;
 869         and &man.pci.4; drivers.</para>
 870
 871       <para revision="274733" arch="powerpc">The power management unit
 872         subsystem has been updated to support power button events on
 873         certain &arch.powerpc; hardware, such as aluminum
 874         PowerBook&nbsp;&reg;.</para>
 875
 876       <para revision="275171,275190" arch="powerpc">The &man.hwpmc.4;
 877         driver has been updated to correct performance counter
 878         sampling on G4 (MPC74xxx) and G5 class processors.</para>
 879
 880       <para revision="281713" arch="powerpc">The &man.hwpmc.4;
 881         driver has been updated to support the Freescale e500
 882         core.</para>
 883
 884       <para revision="275732" contrib="sponsor"
 885         sponsor="&ff;,&netgate;">The
 886         <application>OpenCrypto</application> framework has been
 887         updated to include <literal>AES-ICM</literal> and
 888         <literal>AES-GCM</literal> modes, both of which have also been
 889         added to the &man.aesni.4; driver.</para>
 890     </sect2>
 891
 892     <sect2 xml:id="hardware-virtualization">
 893       <title>Virtualization Support</title>
 894
 895       <para revision="260410">Support for the <quote>Virtual Interrupt
 896           Delivery</quote> feature of &intel;&nbsp;VT-x is enabled if
 897         supported by the CPU.  This feature can be disabled by running
 898         <literal>sysctl hw.vmm.vmx.use_apic_vid=0</literal>.
 899         Additionally, to persist this setting across reboots, add
 900         <literal>hw.vmm.vmx.use_apic_vid=0</literal> to
 901         <filename>/etc/sysctl.conf</filename>.</para>
 902
 903       <para revision="260532">Support for <quote>Posted Interrupt
 904           Processing</quote> is enabled if supported by the CPU.  This
 905         feature can be disabled by running <literal>sysctl
 906           hw.vmm.vmx.use_apic_pir=0</literal>.  Additionally, to
 907         persist this setting across reboots, add
 908         <literal>hw.vmm.vmx.use_apic_pir=0</literal> to
 909         <filename>/etc/sysctl.conf</filename>.</para>
 910
 911       <para revision="260582">Unmapped IO support has been added to
 912         &man.virtio_blk.4;.</para>
 913
 914       <para revision="260583">Unmapped IO support has been added to
 915         &man.virtio_scsi.4;.</para>
 916
 917       <para revision="260847">The &man.virtio_random.4; driver has
 918         been added to harvest entropy from the host system.</para>
 919
 920       <para revision="261504">&os;/&arch.i386; guests can be run under
 921         bhyve.</para>
 922
 923       <para revision="267536" contrib="sponsor"
 924         sponsor="&citrix.rd;">Support for running a &os;/&arch.amd64;
 925         <application>Xen</application> guest instance as
 926         <acronym>PVH</acronym> guest has been added.
 927         <acronym>PVH</acronym> mode, short for <quote>Para-Virtualized
 928           Hardware</quote>, uses para-virtualized drivers for boot and
 929         I/O, and uses hardware virtualization extensions for all other
 930         tasks, without the need for emulation.</para>
 931
 932       <para revision="273515">The &man.virtio.console.4; driver has
 933         been added, which provides an interface to VirtIO console
 934         devices through a &man.tty.4; device.</para>
 935
 936       <para revision="279957">The &man.bhyve.8; hypervisor has been
 937         updated to support <literal>DSM TRIM</literal> commands for
 938         virtual <acronym>AHCI</acronym> disks.</para>
 939
 940       <para revision="281439" arch="arm">Support for the
 941         <application>QEMU</application> <literal>virt</literal> system
 942         has been added.</para>
 943
 944       <para revision="282212" contrib="sponsor" sponsor="&msostc;">The
 945         HyperV&trade; drivers have been updated with several
 946         enhancements:</para>
 947
 948       <itemizedlist>
 949         <listitem>
 950           <para>The &man.hv.vmbus.4; driver now has multi-channel
 951             support.</para>
 952         </listitem>
 953
 954         <listitem>
 955           <para>The &man.hv.storvsc.4; driver now has scatter/gather
 956             support, in addition to performance improvements.</para>
 957         </listitem>
 958
 959         <listitem>
 960           <para>The &man.hv.kvp.4; driver has received several bug
 961             fixes.</para>
 962         </listitem>
 963       </itemizedlist>
 964
 965       <para revision="282274">Support for &man.xen.4; para-virtualized
 966         <literal>domU</literal> kernels has been removed.</para>
 967     </sect2>
 968
 969     <sect2 xml:id="hardware-arm">
 970       <title>ARM Support</title>
 971
 972       <para revision="260921">The &man.nand.4; device is enabled for
 973         ARM devices by default.</para>
 974
 975       <para revision="273264" arch="armv6">An issue that could cause
 976         instability when detecting <acronym>SD</acronym> cards on the
 977         Raspberry Pi <acronym>SOC</acronym> has been fixed.</para>
 978
 979       <para revision="275963">The <literal>bcm2835_cpufreq</literal>
 980         driver has been added, which supports <acronym>CPU</acronym>
 981         frequency and voltage control on the Raspberry Pi
 982         <acronym>SOC</acronym>.</para>
 983
 984       <para revision="280259" contrib="sponsor" sponsor="&ff;">Initial
 985         support for the ARM AArch64 architecture has been
 986         added.</para>
 987
 988       <para revision="282779" arch="arm">Kernel support for Thumb-2
 989         has been added.</para>
 990     </sect2>
 991   </sect1>
 992
 993   <sect1 xml:id="storage">
 994     <title>Storage</title>
 995
 996     <para>This section covers changes and additions to file systems
 997       and other storage subsystems, both local and networked.</para>
 998
 999     <sect2 xml:id="storage-general">
1000       <title>General Storage</title>
1001
1002       <para revision="278037" contrib="sponsor" sponsor="&ix;">The
1003         &man.ctl.4; <acronym>LUN</acronym> mapping has been rewritten,
1004         replacing <acronym>iSCSI</acronym>-specific mapping mechanisms
1005         with a new mechanism that works for any port.</para>
1006
1007       <para revision="278354" contrib="sponsor" sponsor="&ix;">The
1008         &man.ctld.8; utility has been updated to allow controlling
1009         non-<acronym>iSCSI</acronym> &man.ctl.4; ports.</para>
1010     </sect2>
1011
1012     <sect2 xml:id="storage-net">
1013       <title>Networked Storage</title>
1014
1015       <para revision="270096" contrib="sponsor" sponsor="&ff;">The new
1016         filesystem automount facility, &man.autofs.5;, has been added.
1017         The new &man.autofs.5; facility is similar to that found in
1018         other &unix;-like operating systems, such as OS&nbsp;X&trade;
1019         and Solaris&trade;.  The &man.autofs.5; facility uses
1020         a &sun;-compatible &man.auto.master.5; configuration file, and
1021         is administered with the &man.automount.8; userland utility,
1022         and the &man.automountd.8; and &man.autounmountd.8;
1023         daemons.</para>
1024     </sect2>
1025
1026     <sect2 xml:id="storage-zfs">
1027       <title>ZFS</title>
1028
1029       <para revision="275748">The <literal>arc_meta_limit</literal>
1030         statistics are now visible through the
1031         <literal>kstat</literal> &man.sysctl.8;.  As a result of this
1032         change, the <literal>vfs.zfs.arc_meta_used</literal>
1033         &man.sysctl.8; has been removed, and replaced with the
1034         <literal>kstat.zfs.misc.arcstats.arc_meta_used</literal>
1035         &man.sysctl.8;.</para>
1036     </sect2>
1037
1038     <sect2 xml:id="storage-geom">
1039       <title>&man.geom.4;</title>
1040
1041       <para revision="267359">Support for the
1042         <literal>disklabel64</literal> partitioning scheme has been
1043         added to &man.gpart.8;.</para>
1044     </sect2>
1045   </sect1>
1046
1047   <sect1 xml:id="boot">
1048     <title>Boot Loader Changes</title>
1049
1050     <para>This section covers the boot loader, boot menu, and other
1051       boot-related changes.</para>
1052
1053     <sect2 xml:id="boot-loader">
1054       <title>Boot Loader Changes</title>
1055
1056       <para revision="274085">The &man.vt.4; driver has been made the
1057         default system console driver.  The &man.syscons.4; driver is
1058         still available, and can be enabled by adding
1059         <literal>kern.vty=sc</literal> in &man.loader.conf.5;.
1060         Alternatively, &man.syscons.4; can be enabled at boot time by
1061         entering <literal>set kern.vty=sc</literal> at the
1062         &man.loader.8; prompt.</para>
1063
1064       <para revision="281616">The boot loader has been updated to
1065         support entering the <acronym>GELI</acronym> passphrase before
1066         loading the kernel.  To enable this behavior, add
1067         <literal>geom_eli_passphrase_prompt="YES"</literal> to
1068         &man.loader.conf.5;.</para>
1069     </sect2>
1070
1071     <sect2 xml:id="boot-menu">
1072       <title>Boot Menu Changes</title>
1073
1074       <para>&nbsp;</para>
1075     </sect2>
1076   </sect1>
1077
1078   <sect1 xml:id="network">
1079     <title>Networking</title>
1080
1081     <para>This section describes changes that affect networking in
1082       &os;.</para>
1083
1084     <sect2 xml:id="network-protocols">
1085       <title>Network Procols</title>
1086
1087       <para revision="263140">Support for the IPX network transport
1088         protocol has been removed, and will not be supported in
1089         &os;&nbsp;11 and later releases.</para>
1090
1091       <para revision="272720" contrib="sponsor"
1092         sponsor="&limelight;">Support for <acronym>PLPMTUD</acronym>
1093         blackhole detection (<acronym>RFC</acronym> 4821) has been
1094         added to the &man.tcp.4; stack, disabled by default.  New
1095         control tunables have been added:</para>
1096
1097       <informaltable frame="none" pgwide="0">
1098         <tgroup cols="2">
1099           <colspec colwidth="1*"/>
1100           <colspec colwidth="1*"/>
1101           <thead>
1102             <row>
1103               <entry>Tunable</entry>
1104               <entry>Description</entry>
1105             </row>
1106           </thead>
1107
1108           <tbody>
1109             <row>
1110               <entry><literal>net.inet.tcp.pmtud_blackhole_detection</literal></entry>
1111               <entry>Enables or disables <acronym>PLPMTUD</acronym>
1112                 blackhole detection</entry>
1113             </row>
1114
1115             <row>
1116               <entry><literal>net.inet.tcp.pmtud_blackhole_mss</literal></entry>
1117               <entry><acronym>MSS</acronym> to try for IPv4</entry>
1118             </row>
1119
1120             <row>
1121               <entry><literal>net.inet.tcp.v6pmtud_blackhole_mss</literal></entry>
1122               <entry><acronym>MSS to try for IPv6</acronym></entry>
1123             </row>
1124           </tbody>
1125         </tgroup>
1126       </informaltable>
1127
1128       <para>New monitoring &man.sysctl.8;s haven been added:</para>
1129
1130       <informaltable frame="none" pgwide="0">
1131         <tgroup cols="2">
1132           <colspec colwidth="1*"/>
1133           <colspec colwidth="1*"/>
1134           <thead>
1135             <row>
1136               <entry>Tunable</entry>
1137               <entry>Description</entry>
1138             </row>
1139           </thead>
1140
1141           <tbody>
1142             <row>
1143               <entry><literal>net.inet.tcp.pmtud_blackhole_activated</literal></entry>
1144               <entry>Number of times the code was activated to attempt
1145                 downshifting the <acronym>MSS</acronym></entry>
1146             </row>
1147
1148             <row>
1149               <entry><literal>net.inet.tcp.pmtud_blackhole_min_activated</literal></entry>
1150               <entry>Number of times the blackhole
1151                 <acronym>MSS</acronym> was used in an attempt to
1152                 downshift</entry>
1153             </row>
1154
1155             <row>
1156               <entry><literal>net.inet.tcp.pmtud_blackhole_failed</literal></entry>
1157               <entry>Number of times that the blackhole failed to
1158                 connect after downshifting the
1159                 <acronym>MSS</acronym></entry>
1160             </row>
1161           </tbody>
1162         </tgroup>
1163       </informaltable>
1164
1165       <para revision="280971" contrib="sponsor"
1166         sponsor="&netflix;, &nginx;">Support for <acronym>IP</acronym>
1167         identification for atomic datagrams (<acronym>RFC</acronym>
1168         6864) has been added.  Support for this feature can be toggled
1169         with the <literal>net.inet.ip.rfc6864</literal>
1170         &man.sysctl.8;, which is enabled by default.</para>
1171     </sect2>
1172   </sect1>
1173
1174   <sect1 xml:id="ports">
1175     <title>Ports Collection and Package Infrastructure</title>
1176
1177     <para>This section covers changes to the &os;&nbsp;Ports
1178       Collection, package infrastructure, and package maintenance and
1179       installation tools.</para>
1180
1181     <sect2 xml:id="ports-infrastructure">
1182       <title>Infrastructure Changes</title>
1183
1184       <para>&nbsp;</para>
1185     </sect2>
1186
1187     <sect2 xml:id="ports-packages ">
1188       <title>Packaging Changes</title>
1189
1190       <para>&nbsp;</para>
1191     </sect2>
1192   </sect1>
1193
1194   <sect1 xml:id="doc">
1195     <title>Documentation</title>
1196
1197     <para>This section covers changes to the &os;&nbsp;Documentation
1198       Project sources and toolchain.</para>
1199
1200     <sect2 xml:id="doc-sources">
1201       <title>Documentation Source Changes</title>
1202
1203       <para>&nbsp;</para>
1204     </sect2>
1205
1206     <sect2 xml:id="doc-toolchain">
1207       <title>Documentation Toolchain Changes</title>
1208
1209       <para>&nbsp;</para>
1210     </sect2>
1211   </sect1>
1212
1213   <sect1 xml:id="releng">
1214     <title>Release Engineering and Integration</title>
1215
1216     <para>This section convers changes that are specific to the
1217       &os;&nbsp;Release Engineering processes.</para>
1218
1219     <sect2 xml:id="releng-changes">
1220       <title>Integration Changes</title>
1221
1222       <para revision="277458" contrib="sponsor" sponsor="&ff;">The
1223         Release Engineering build tools have been updated to include
1224         support for producing virtual machine disk images for various
1225         cloud hosting providers.</para>
1226
1227       <para revision="278926">The Release Engineering build tools have
1228         been updated to use multi-threaded &man.xz.1;.  By default,
1229         the number of &man.xz.1; threads is set to the number of cores
1230         available.</para>
1231
1232       <para revision="281802" contrib="sponsor" sponsor="&ff;">The
1233         Release Engineering build tools have been updated to include
1234         support for building &os;/&arch.arm64; virtual machine and
1235         memory stick installation images.</para>
1236     </sect2>
1237   </sect1>
1238 </article>