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     </sect2>
 344
 345     <sect2 xml:id="userland-contrib">
 346       <title>Contributed Software</title>
 347
 348       <para revision="258884" contrib="sponsor"
 349         sponsor="&darpa_afrl;">&man.lldb.1; has been updated to
 350         upstream snapshot version r196259.</para>
 351
 352       <para revision="259626">Timezone data files have been updated to
 353         version 2013i.</para>
 354
 355       <para revision="260445">&man.byacc.1; has been updated to
 356         version 20140101.</para>
 357
 358       <para revision="261071">&man.jemalloc.3; has been updated to
 359         version 3.5.0.</para>
 360
 361       <para revision="261283"><application>libc++</application> has
 362         been updated to version 3.4.</para>
 363
 364       <para revision="261320"><application>OpenSSH</application> has
 365         been updated to 6.5p1.</para>
 366
 367       <para revision="261344"><application>mdocml</application> has
 368         been updated to version 1.12.3.</para>
 369
 370       <para revision="261991"><application>LLVM</application> and
 371         <application>Clang</application> have been updated to
 372         version 3.4.</para>
 373
 374       <para revision="266527"
 375         role="merged"><application>Sendmail</application> has been
 376         updated from 8.14.7 to 8.14.9.</para>
 377
 378       <para revision="276577"><application>file</application> has been
 379         updated to version 5.22.</para>
 380
 381       <para revision="275718">The <application>binutils</application>
 382         suite of utilities has been updated to include upstream
 383         patches that add new relocations for &arch.powerpc;
 384         support.</para>
 385
 386       <para revision="276398" contrib="sponsor" sponsor="&ff;">The
 387         <application>ELF Tool Chain</application> has been updated to
 388         upstream revision r3136.</para>
 389
 390       <para revision="276551">The <application>texinfo</application>
 391         utility and <literal>info</literal> pages were removed from
 392         the base system.  The <filename
 393           role="package">print/texinfo</filename> port should be
 394         installed on systems where <literal>info</literal> pages are
 395         needed.</para>
 396
 397       <para revision="276796" contrib="sponsor" sponsor="&ff;">The ELF
 398         object manipulation tools
 399         <application>addr2line</application>,
 400         <application>elfcopy (strip)</application>,
 401         <application>nm</application>,
 402         <application>readelf</application>,
 403         <application>size</application>, and
 404         <application>strings</application> were switched to the
 405         versions from the ELF Tool Chain project.</para>
 406
 407       <para revision="276881">The <literal>libedit</literal> library
 408         has been updated to include <acronym>UTF-8</acronym> support,
 409         adding <acronym>UTF-8</acronym> support to the &man.sh.1;
 410         shell.</para>
 411
 412       <para revision="278433">The &man.xz.1; utility has been updated
 413         to support multi-threaded compression.</para>
 414
 415       <para revision="280297"><application>OpenSSL</application> has
 416         been updated to version 1.0.1m.</para>
 417
 418       <para revision="280932" contrib="sponsor" sponsor="&ff;">The
 419         <application>elftoolchain</application> utilities have been
 420         updated to version 3179.</para>
 421
 422       <para revision="281316">The &man.xz.1; utility has been updated
 423         to version 5.2.1.</para>
 424
 425       <para revision="281373">The &man.nvi.1; utility has been updated
 426         to version 2.1.3.</para>
 427
 428       <para revision="281396">The &man.acpi.4; subsystem has been
 429         updated to version 20150410.</para>
 430
 431       <para revision="281806">The &man.wpa.supplicant.8; and
 432         &man.hostapd.8; utilities have been updated to version
 433         2.4.</para>
 434
 435       <para revision="281812"><application>bmake</application> has
 436         been updated to version 20150418.</para>
 437
 438       <para revision="282089">The &man.unbound.8; utility has been
 439         updated to version 1.5.3.</para>
 440
 441       <para revision="282434" contrib="sponsor" sponsor="&ff;">The
 442         &man.resolvconf.8; utility has been updated to version
 443         3.7.0.</para>
 444     </sect2>
 445
 446     <sect2 xml:id="userland-installer">
 447       <title>Installation and Configuration Tools</title>
 448
 449       <para revision="271539">The &man.bsdinstall.8; partition editor
 450         and &man.sade.8; utility have been updated to include native
 451         <acronym>ZFS</acronym> support.</para>
 452
 453       <para revision="272274">The &os; installation utility,
 454         &man.bsdinstall.8;, has been updated to set the
 455         <literal>canmount</literal> &man.zfs.8; property to
 456         <literal>off</literal> for the <filename
 457           class="directory">/var</filename> dataset, preventing the
 458         contents of directories within <filename
 459           class="directory">/var</filename> from conflicting when
 460         using multiple boot environments, such as that provided by
 461         <filename role="package">sysutils/beadm</filename>.</para>
 462
 463       <para revision="274394">The &man.bsdconfig.8; utility has been
 464         updated to skip the initial &man.tzsetup.8;
 465         <acronym>UTC</acronym> versus wall-clock time prompt when run
 466         in a virtual machine, determined when the
 467         <literal>kern.vm_guest</literal> &man.sysctl.8; is set to
 468         <literal>1</literal>.</para>
 469
 470       <para revision="275874">The &man.bsdinstall.8; utility has been
 471         updated to use the new &man.dpv.3; library to display progress
 472         when extracting the &os; distributions.</para>
 473     </sect2>
 474
 475     <sect2 xml:id="userland-rc">
 476       <title><filename class="directory">/etc/rc.d</filename>
 477         Scripts</title>
 478
 479       <para revision="270676">The &man.rc.8; subsystem has been
 480         updated to allow configuring services in <filename
 481           class="directory">&dollar;{LOCALBASE}/etc/rc.conf.d/</filename>.
 482         If <literal>LOCALBASE</literal> is unset, it defaults to
 483         <filename class="directory">/usr/local</filename>.</para>
 484
 485       <para revision="275299">The <filename>mrouted</filename>
 486         &man.rc.8; script has been removed from the base system.  An
 487         equivalent script is available from the <filename
 488           role="package">net/mrouted</filename> port.</para>
 489
 490       <para revision="279463" contrib="sponsor"
 491         sponsor="&sandvine;">A new &man.rc.8; script,
 492         <filename>iovctl</filename>, has been added, which allows
 493         automatically starting the &man.iovctl.8; utility at
 494         boot.</para>
 495     </sect2>
 496
 497     <sect2 xml:id="userland-periodic">
 498       <title><filename class="directory">/etc/periodic</filename>
 499         Scripts</title>
 500
 501       <para revision="271321">The daily &man.periodic.8; script
 502         <filename>110.clean-tmps</filename> has been updated to avoid
 503         crossing filesystem mount boundaries when cleaning files in
 504         <filename class="directory">/tmp</filename>.</para>
 505     </sect2>
 506
 507     <sect2 xml:id="userland-libraries">
 508       <title>Runtime Libraries and API</title>
 509
 510       <para revision="268461">The &man.readline.3; library is now
 511         statically linked in software within the base system, and the
 512         shared library is no longer installed, allowing the Ports
 513         Collection to use a modern version of the library.</para>
 514
 515       <para revision="272273">The &man.strptime.3; library has been
 516         updated to add support for <acronym>POSIX</acronym>-2001
 517         features <literal>%U</literal> and
 518         <literal>%W</literal>.</para>
 519
 520       <para revision="272842,272848" contrib="sponsor"
 521         sponsor="&ff;">The &man.dl.iterate.phdr.3; library has been
 522         changed to always return the path name of the
 523         <acronym>ELF</acronym> object in the
 524         <literal>dlpi_name</literal> structure member.</para>
 525
 526       <para revision="273562" contrib="sponsor"
 527         sponsor="&juniper;">The &man.libxo.3; library has been
 528         imported to the base system.</para>
 529
 530       <para revision="273806" contrib="sponsor" sponsor="&chelsio;">A
 531         userland library for Chelsio Terminator 5 based iWARP cards
 532         has been added, allowing userland <acronym>RDMA</acronym>
 533         applications to work over compatible
 534         <acronym>NIC</acronym>s.</para>
 535
 536       <para revision="274987">The &man.gpio.3; library has been added,
 537         providing a wrapper around the &man.gpio.4; kernel
 538         interface.</para>
 539
 540       <para revision="277610">The <literal>futimens()</literal> and
 541         <literal>utimensat()</literal> system calls have been
 542         added.  See &man.utimensat.2; for more information.</para>
 543
 544       <para revision="278934">The &man.elf.3; compile-time dependency
 545         has been removed from <filename>dtri.o</filename>, which
 546         allows adding <application>DTrace</application> probes to
 547         userland applications and libraries without also linking
 548         against &man.elf.3;.</para>
 549
 550       <para revision="279186">The &man.setmode.3; function has been
 551         updated to consistently set <literal>errno</literal> on
 552         failure.</para>
 553
 554       <para revision="279663">The &man.qsort.3; functions have been
 555         updated to be able to handle 32-bit aligned data on 64-bit
 556         platforms, also providing a significant improvement in 32-bit
 557         workloads.</para>
 558
 559       <para revision="281130">Several standard include headers have
 560         been updated to use of <application>gcc</application>
 561         attributes, such as <literal>__result_use_check()</literal>,
 562         <literal>__alloc_size()</literal>, and
 563         <literal>__nonnull()</literal>.</para>
 564
 565       <para revision="281845">Support for file verification in
 566         <acronym>MAC</acronym> has been added.</para>
 567     </sect2>
 568
 569     <sect2 xml:id="userland-abi">
 570       <title>ABI Compatibility</title>
 571
 572       <para revision="271982">The &linux; compatibility version has
 573         been updated to <literal>2.6.18</literal>.  The
 574         <literal>compat.linux.osrelease</literal> &man.sysctl.8; is
 575         evaluated when building the <filename
 576           role="package">emulators/linux-c6</filename> and related
 577         ports.</para>
 578     </sect2>
 579   </sect1>
 580
 581   <sect1 xml:id="kernel">
 582     <title>Kernel</title>
 583
 584     <para>This section covers changes to kernel configurations, system
 585       tuning, and system control parameters that are not otherwise
 586       categorized.</para>
 587
 588     <sect2 xml:id="kernel-bugfix">
 589       <title>Kernel Bug Fixes</title>
 590
 591       <para revision="265876">A kernel bug that inhibited proper
 592         functionality of the <literal>dev.cpu.0.freq</literal>
 593         &man.sysctl.8; on &intel; processors with Turbo
 594         Boost&nbsp;&trade; enabled has been fixed.</para>
 595
 596       <para revision="271697" arch="powerpc">Support for
 597         &man.dtrace.1; stack tracing has been fixed for
 598         &os;/&arch.powerpc;, using the <literal>trapexit()</literal>
 599         and <literal>asttrapexit()</literal> functions instead of
 600         checking within addressed kernel space.</para>
 601
 602       <para revision="272089">A bug in &man.ipfw.4; that could
 603         potentially lead to a kernel panic when using &man.dummynet.4;
 604         at layer 2 has been fixed.</para>
 605
 606       <para revision="280930" contrib="sponsor" sponsor="&mitail;">The
 607         kernel <acronym>RPC</acronym> has been updated to include
 608         several enhancements:</para>
 609
 610       <itemizedlist>
 611         <listitem>
 612           <para>The 45 MiB limit on requests queued for
 613             &man.nfsd.8; threads has been removed.</para>
 614         </listitem>
 615
 616         <listitem>
 617           <para>Avoids unnecessary throttling by not deferring
 618             accounting for completed requests.</para>
 619         </listitem>
 620
 621         <listitem>
 622           <para>Fixes an integer overflow and signedness bugs.</para>
 623         </listitem>
 624       </itemizedlist>
 625
 626       <para revision="281261" arch="powerpc">Support for
 627         &man.dtrace.1; has been added for the
 628         Book-E&nbsp;&trade;.</para>
 629     </sect2>
 630
 631     <sect2 xml:id="kernel-config">
 632       <title>Kernel Configuration</title>
 633
 634       <para revision="266531">The <literal>IMAGACT_BINMISC</literal>
 635         kernel configuration option has been enabled by default,
 636         which enables application execution through emulators, such
 637         as <application>Qemu</application>.</para>
 638
 639       <para revision="268045">The <literal>VT</literal> kernel
 640         configuration file has been removed, and the &man.vt.4;
 641         driver is included in the <literal>GENERIC</literal> kernel.
 642         To enable &man.vt.4;, enter <literal>set kern.vty=vt</literal>
 643         at the &man.loader.8; prompt during boot, or add
 644         <literal>kern.vty=vt</literal> to &man.loader.conf.5; and
 645         reboot the system.</para>
 646
 647       <para revision="277904">The &man.config.8; utility has been
 648         updated to allow using a non-standard <filename
 649           class="directory">src/</filename> tree, specified as an
 650         argument to the <literal>-s</literal> flag.</para>
 651
 652       <para revision="277990" arch="powerpc64">The
 653         &os;/&arch.powerpc64; kernel now builds as
 654         a position-independent executable, allowing the kernel to be
 655         loaded into and run from any physical or virtual
 656         address.</para>
 657
 658       <important>
 659         <para>This change requires an update to &man.loader.8;.
 660           The userland and kernel must be updated before rebooting the
 661           system.</para>
 662       </important>
 663
 664       <para revision="279189" contrib="sponsor" sponsor="&ff;"
 665         arch="powerpc">Kernel support for Vector-Scalar eXtension
 666         (<acronym>VSX</acronym>) found on POWER7 and POWER8 hardware
 667         has been added.</para>
 668
 669       <para revision="279252" contrib="sponsor" sponsor="&ff;"
 670         arch="powerpc">The &man.pmap.9; implementation for 64-bit
 671         &powerpc; processors has been overhaulded to improve
 672         concurrency.</para>
 673     </sect2>
 674
 675     <sect2 xml:id="kernel-sysctl">
 676       <title>System Tuning and Controls</title>
 677
 678       <para revision="275140" contrib="sponsor" sponsor="&ff;">The
 679         &man.hwpmc.4; default and maximum callchain depths have been
 680         increased.  The default has been increased from 16 to 32, and
 681         the maximum increased from 32 to 128.</para>
 682
 683       <para revision="279361">The <literal>kern.osrelease</literal>
 684         and <literal>kern.osreldate</literal> are now configurable
 685         &man.jail.8; parameters.</para>
 686
 687       <para revision="280308,280949" contrib="sponsor"
 688         sponsor="&ix;, &ff;">The &man.devfs.5; device filesystem has
 689         been changed to update timestamps for read/write operations
 690         using seconds precision.  A new &man.sysctl.8;,
 691         <literal>vfs.devfs.dotimes</literal> has been added, which
 692         when set to a non-zero value, enables default precision
 693         timestamps for these operations.</para>
 694
 695       <para revision="282213" contrib="sponsor" sponsor="&ff;">A new
 696         &man.sysctl.8;, <literal>kern.racct.enable</literal>, has been
 697         added, which when set to a non-zero value allows using
 698         &man.rctl.8; with the <literal>GENERIC</literal> kernel.
 699         A new kernel configuration option,
 700         <literal>RACCT_DISABLED</literal> has also been added.</para>
 701     </sect2>
 702   </sect1>
 703
 704   <sect1 xml:id="drivers">
 705     <title>Devices and Drivers</title>
 706
 707     <para>This section covers changes and additions to devices and
 708       device drivers since &release.prev;.</para>
 709
 710     <sect2 xml:id="drivers-device">
 711       <title>Device Drivers</title>
 712
 713       <para revision="260903">Support for GPS ports has been added to
 714         &man.uhso.4;.</para>
 715
 716       <para revision="265132">The &man.full.4; device has been added,
 717         and the <literal>lindev(4)</literal> device has been removed.
 718         Prior to this change, <literal>lindev(4)</literal> provided
 719         only the <filename>/dev/full</filename> character device,
 720         returning <literal>ENOSPC</literal> on write attempts.  As
 721         this device is not specific to &linux;, a native &os; version
 722         has been added.</para>
 723
 724       <para revision="271705">Hardware context support has been
 725         added to the <literal>drm/i915</literal> driver, adding
 726         support for <application>Mesa</application> 9.2 and
 727         later.</para>
 728
 729       <para revision="273178">The &man.vt.4; driver has been updated,
 730         replacing the bitmapped <literal>kern.vt.spclkeys</literal>
 731         &man.sysctl.8; with individual
 732         <literal>kern.vt.kbd_*</literal> variants.</para>
 733
 734       <para revision="273598">The &man.hpet.4; driver has been updated
 735         to create a
 736         <filename>/dev/hpet<replaceable>N</replaceable></filename>
 737         device, providing access to <acronym>HPET</acronym> from
 738         userspace.</para>
 739
 740       <para revision="280183">The <literal>drm</literal> code has
 741         been updated to match &linux; version 3.8.13.</para>
 742     </sect2>
 743
 744     <sect2 xml:id="drivers-storage">
 745       <title>Storage Drivers</title>
 746
 747       <para revision="265236" contrib="sponsor"
 748         sponsor="&lsi;, &spectralogic;" sponsorurl="">The &man.mpr.4;
 749         device has been added, providing support for LSI Fusion-MPT
 750         3 12Gb SCSI/SATA controllers.</para>
 751
 752       <para revision="265555" contrib="sponsor"
 753           sponsor="&lsi;">The &man.mrsas.4; driver has been added,
 754         providing support for LSI MegaRAID SAS controllers.  The
 755         &man.mfi.4; driver will attach to the controller, by default.
 756         To enable &man.mrsas.4; add
 757         <literal>hw.mfi.mrsas_enable=1</literal> to
 758         <filename>/boot/loader.conf</filename>, which turns off
 759         &man.mfi.4; device probing.</para>
 760
 761       <note>
 762         <para>At this time, the &man.mfiutil.8; utility and the &os;
 763           version of <application>MegaCLI</application> and
 764           <application>StorCli</application> do not work with
 765           &man.mrsas.4;.</para>
 766       </note>
 767
 768       <para revision="275461" contrib="sponsor" sponsor="&ix;">The
 769         &man.ctl.4; subsystem has been updated, increasing the ports
 770         limit from <literal>128</literal> to <literal>256</literal>,
 771         and <acronym>LUN</acronym> limit from <literal>256</literal>
 772         to <literal>1024</literal>.</para>
 773
 774       <para revision="276526">The <literal>asr(4)</literal> driver has
 775         been removed, and is no longer supported.</para>
 776
 777       <para revision="281387">The &man.hptnr.4; driver has been
 778         updated to version 1.1.1.</para>
 779     </sect2>
 780
 781     <sect2 xml:id="drivers-network">
 782       <title>Network Drivers</title>
 783
 784       <para revision="258830">Support for Broadcom chipsets BCM57764,
 785         BCM57767, BCM57782, BCM57786 and BCM57787 has been added to
 786         &man.bge.4;.</para>
 787
 788       <para revision="260448">Support for the &intel; Centrino&trade;
 789         Wireless-N 135 chipset has been added.</para>
 790
 791       <para revision="260552">Firmware for &intel; Centrino&trade;
 792         Wireless-N 105 devices has been added to the base
 793         system.</para>
 794
 795       <para revision="261975">The deprecated nve(4) driver has been
 796         removed.  Users of NVIDIA nForce MCP network adapters are
 797         advised to use the &man.nfe.4; driver instead, which has been
 798         the default driver for this hardware since
 799         &os;&nbsp;7.0.</para>
 800
 801       <para revision="264601" contrib="sponsor"
 802         sponsor="&darpa_afrl;">The <literal>if_nf10bmac(4)</literal>
 803         device has been added, providing support for NetFPGA-10G
 804         Embedded CPU Ethernet Core.</para>
 805
 806       <note>
 807         <para>The <literal>if_nf10bmac(4)</literal> driver operates on
 808           the FPGA, and is not suited for the PCI host
 809           interface.</para>
 810       </note>
 811
 812       <para revision="265348" contrib="sponsor"
 813         sponsor="&netgate;">The &man.ath.hal.4; driver has been
 814         updated to support the Atheros AR1111 chipset.</para>
 815
 816       <para revision="266770">Support for the &intel; Centrino&trade;
 817         Wireless-N 105 chipset has been added.</para>
 818
 819       <para revision="266757" contrib="sponsor"
 820         sponsor="&chelsio;">Support for the &man.cxgbe.4; Terminator
 821         5 (T5) 10G/40G cards has been added to &man.netmap.4;.</para>
 822
 823       <para revision="272730">The &man.alc.4; driver has been updated
 824         to support AR816x and AR817x ethernet controllers.</para>
 825
 826       <para revision="273331">The &man.vxlan.4; driver has been added,
 827         which creates a virtual Layer 2 (Ethernet) network overlaid in
 828         a Layer 3 (IP/UDP) network.  The &man.vxlan.4; driver is
 829         analogous to &man.vlan.4;, but is designed to be better suited
 830         for large, multiple-tenant datacenter environments.</para>
 831
 832       <para revision="274246" contrib="sponsor" sponsor="&yandex;">The
 833         &man.gre.4; driver has been significantly overhauled, and has
 834         been split into two separate modules, &man.gre.4; and
 835         &man.me.4;.</para>
 836     </sect2>
 837   </sect1>
 838
 839   <sect1 xml:id="hardware">
 840     <title>Hardware Support</title>
 841
 842     <para>This section covers general hardware support for physical
 843       machines, hypervisors, and virtualization environments, as well
 844       as hardware changes and updates that do not otherwise fit in
 845       other sections of this document.</para>
 846
 847     <sect2 xml:id="hardware-support">
 848       <title>Hardware Support</title>
 849
 850       <para revision="268303">The &man.asmc.4; driver has been
 851         updated to support the &apple;&nbsp;MacMini 3,1.</para>
 852
 853       <para revision="268351">Support for &os;/ia64 has been dropped
 854         as of &os;&nbsp;11.</para>
 855
 856       <para revision="274386">An issue that could cause a system to
 857         hang when entering <acronym>ACPI</acronym>
 858         <literal>S3</literal> state (suspend to
 859         <acronym>RAM</acronym>) has been corrected in the &man.acpi.4;
 860         and &man.pci.4; drivers.</para>
 861
 862       <para revision="274733" arch="powerpc">The power management unit
 863         subsystem has been updated to support power button events on
 864         certain &arch.powerpc; hardware, such as aluminum
 865         PowerBook&nbsp;&reg;.</para>
 866
 867       <para revision="275171,275190" arch="powerpc">The &man.hwpmc.4;
 868         driver has been updated to correct performance counter
 869         sampling on G4 (MPC74xxx) and G5 class processors.</para>
 870
 871       <para revision="281713" arch="powerpc">The &man.hwpmc.4;
 872         driver has been updated to support the Freescale e500
 873         core.</para>
 874
 875       <para revision="275732" contrib="sponsor"
 876         sponsor="&ff;,&netgate;">The
 877         <application>OpenCrypto</application> framework has been
 878         updated to include <literal>AES-ICM</literal> and
 879         <literal>AES-GCM</literal> modes, both of which have also been
 880         added to the &man.aesni.4; driver.</para>
 881     </sect2>
 882
 883     <sect2 xml:id="hardware-virtualization">
 884       <title>Virtualization Support</title>
 885
 886       <para revision="260410">Support for the <quote>Virtual Interrupt
 887           Delivery</quote> feature of &intel;&nbsp;VT-x is enabled if
 888         supported by the CPU.  This feature can be disabled by running
 889         <literal>sysctl hw.vmm.vmx.use_apic_vid=0</literal>.
 890         Additionally, to persist this setting across reboots, add
 891         <literal>hw.vmm.vmx.use_apic_vid=0</literal> to
 892         <filename>/etc/sysctl.conf</filename>.</para>
 893
 894       <para revision="260532">Support for <quote>Posted Interrupt
 895           Processing</quote> is enabled if supported by the CPU.  This
 896         feature can be disabled by running <literal>sysctl
 897           hw.vmm.vmx.use_apic_pir=0</literal>.  Additionally, to
 898         persist this setting across reboots, add
 899         <literal>hw.vmm.vmx.use_apic_pir=0</literal> to
 900         <filename>/etc/sysctl.conf</filename>.</para>
 901
 902       <para revision="260582">Unmapped IO support has been added to
 903         &man.virtio_blk.4;.</para>
 904
 905       <para revision="260583">Unmapped IO support has been added to
 906         &man.virtio_scsi.4;.</para>
 907
 908       <para revision="260847">The &man.virtio_random.4; driver has
 909         been added to harvest entropy from the host system.</para>
 910
 911       <para revision="261504">&os;/&arch.i386; guests can be run under
 912         bhyve.</para>
 913
 914       <para revision="267536" contrib="sponsor"
 915         sponsor="&citrix.rd;">Support for running a &os;/&arch.amd64;
 916         <application>Xen</application> guest instance as
 917         <acronym>PVH</acronym> guest has been added.
 918         <acronym>PVH</acronym> mode, short for <quote>Para-Virtualized
 919           Hardware</quote>, uses para-virtualized drivers for boot and
 920         I/O, and uses hardware virtualization extensions for all other
 921         tasks, without the need for emulation.</para>
 922
 923       <para revision="273515">The &man.virtio.console.4; driver has
 924         been added, which provides an interface to VirtIO console
 925         devices through a &man.tty.4; device.</para>
 926
 927       <para revision="279957">The &man.bhyve.8; hypervisor has been
 928         updated to support <literal>DSM TRIM</literal> commands for
 929         virtual <acronym>AHCI</acronym> disks.</para>
 930
 931       <para revision="281439" arch="arm">Support for the
 932         <application>QEMU</application> <literal>virt</literal> system
 933         has been added.</para>
 934
 935       <para revision="282212" contrib="sponsor" sponsor="&msostc;">The
 936         HyperV&trade; drivers have been updated with several
 937         enhancements:</para>
 938
 939       <itemizedlist>
 940         <listitem>
 941           <para>The &man.hv.vmbus.4; driver now has multi-channel
 942             support.</para>
 943         </listitem>
 944
 945         <listitem>
 946           <para>The &man.hv.storvsc.4; driver now has scatter/gather
 947             support, in addition to performance improvements.</para>
 948         </listitem>
 949
 950         <listitem>
 951           <para>The &man.hv.kvp.4; driver has received several bug
 952             fixes.</para>
 953         </listitem>
 954       </itemizedlist>
 955
 956       <para revision="282274">Support for &man.xen.4; para-virtualized
 957         <literal>domU</literal> kernels has been removed.</para>
 958     </sect2>
 959
 960     <sect2 xml:id="hardware-arm">
 961       <title>ARM Support</title>
 962
 963       <para revision="260921">The &man.nand.4; device is enabled for
 964         ARM devices by default.</para>
 965
 966       <para revision="273264" arch="armv6">An issue that could cause
 967         instability when detecting <acronym>SD</acronym> cards on the
 968         Raspberry Pi <acronym>SOC</acronym> has been fixed.</para>
 969
 970       <para revision="275963">The <literal>bcm2835_cpufreq</literal>
 971         driver has been added, which supports <acronym>CPU</acronym>
 972         frequency and voltage control on the Raspberry Pi
 973         <acronym>SOC</acronym>.</para>
 974
 975       <para revision="280259" contrib="sponsor" sponsor="&ff;">Initial
 976         support for the ARM AArch64 architecture has been
 977         added.</para>
 978     </sect2>
 979   </sect1>
 980
 981   <sect1 xml:id="storage">
 982     <title>Storage</title>
 983
 984     <para>This section covers changes and additions to file systems
 985       and other storage subsystems, both local and networked.</para>
 986
 987     <sect2 xml:id="storage-general">
 988       <title>General Storage</title>
 989
 990       <para revision="278037" contrib="sponsor" sponsor="&ix;">The
 991         &man.ctl.4; <acronym>LUN</acronym> mapping has been rewritten,
 992         replacing <acronym>iSCSI</acronym>-specific mapping mechanisms
 993         with a new mechanism that works for any port.</para>
 994
 995       <para revision="278354" contrib="sponsor" sponsor="&ix;">The
 996         &man.ctld.8; utility has been updated to allow controlling
 997         non-<acronym>iSCSI</acronym> &man.ctl.4; ports.</para>
 998     </sect2>
 999
1000     <sect2 xml:id="storage-net">
1001       <title>Networked Storage</title>
1002
1003       <para revision="270096" contrib="sponsor" sponsor="&ff;">The new
1004         filesystem automount facility, &man.autofs.5;, has been added.
1005         The new &man.autofs.5; facility is similar to that found in
1006         other &unix;-like operating systems, such as OS&nbsp;X&trade;
1007         and Solaris&trade;.  The &man.autofs.5; facility uses
1008         a &sun;-compatible &man.auto.master.5; configuration file, and
1009         is administered with the &man.automount.8; userland utility,
1010         and the &man.automountd.8; and &man.autounmountd.8;
1011         daemons.</para>
1012     </sect2>
1013
1014     <sect2 xml:id="storage-zfs">
1015       <title>ZFS</title>
1016
1017       <para revision="275748">The <literal>arc_meta_limit</literal>
1018         statistics are now visible through the
1019         <literal>kstat</literal> &man.sysctl.8;.  As a result of this
1020         change, the <literal>vfs.zfs.arc_meta_used</literal>
1021         &man.sysctl.8; has been removed, and replaced with the
1022         <literal>kstat.zfs.misc.arcstats.arc_meta_used</literal>
1023         &man.sysctl.8;.</para>
1024     </sect2>
1025
1026     <sect2 xml:id="storage-geom">
1027       <title>&man.geom.4;</title>
1028
1029       <para revision="267359">Support for the
1030         <literal>disklabel64</literal> partitioning scheme has been
1031         added to &man.gpart.8;.</para>
1032     </sect2>
1033   </sect1>
1034
1035   <sect1 xml:id="boot">
1036     <title>Boot Loader Changes</title>
1037
1038     <para>This section covers the boot loader, boot menu, and other
1039       boot-related changes.</para>
1040
1041     <sect2 xml:id="boot-loader">
1042       <title>Boot Loader Changes</title>
1043
1044       <para revision="274085">The &man.vt.4; driver has been made the
1045         default system console driver.  The &man.syscons.4; driver is
1046         still available, and can be enabled by adding
1047         <literal>kern.vty=sc</literal> in &man.loader.conf.5;.
1048         Alternatively, &man.syscons.4; can be enabled at boot time by
1049         entering <literal>set kern.vty=sc</literal> at the
1050         &man.loader.8; prompt.</para>
1051
1052       <para revision="281616">The boot loader has been updated to
1053         support entering the <acronym>GELI</acronym> passphrase before
1054         loading the kernel.  To enable this behavior, add
1055         <literal>geom_eli_passphrase_prompt="YES"</literal> to
1056         &man.loader.conf.5;.</para>
1057     </sect2>
1058
1059     <sect2 xml:id="boot-menu">
1060       <title>Boot Menu Changes</title>
1061
1062       <para>&nbsp;</para>
1063     </sect2>
1064   </sect1>
1065
1066   <sect1 xml:id="network">
1067     <title>Networking</title>
1068
1069     <para>This section describes changes that affect networking in
1070       &os;.</para>
1071
1072     <sect2 xml:id="network-protocols">
1073       <title>Network Procols</title>
1074
1075       <para revision="263140">Support for the IPX network transport
1076         protocol has been removed, and will not be supported in
1077         &os;&nbsp;11 and later releases.</para>
1078
1079       <para revision="272720" contrib="sponsor"
1080         sponsor="&limelight;">Support for <acronym>PLPMTUD</acronym>
1081         blackhole detection (<acronym>RFC</acronym> 4821) has been
1082         added to the &man.tcp.4; stack, disabled by default.  New
1083         control tunables have been added:</para>
1084
1085       <informaltable frame="none" pgwide="0">
1086         <tgroup cols="2">
1087           <colspec colwidth="1*"/>
1088           <colspec colwidth="1*"/>
1089           <thead>
1090             <row>
1091               <entry>Tunable</entry>
1092               <entry>Description</entry>
1093             </row>
1094           </thead>
1095
1096           <tbody>
1097             <row>
1098               <entry><literal>net.inet.tcp.pmtud_blackhole_detection</literal></entry>
1099               <entry>Enables or disables <acronym>PLPMTUD</acronym>
1100                 blackhole detection</entry>
1101             </row>
1102
1103             <row>
1104               <entry><literal>net.inet.tcp.pmtud_blackhole_mss</literal></entry>
1105               <entry><acronym>MSS</acronym> to try for IPv4</entry>
1106             </row>
1107
1108             <row>
1109               <entry><literal>net.inet.tcp.v6pmtud_blackhole_mss</literal></entry>
1110               <entry><acronym>MSS to try for IPv6</acronym></entry>
1111             </row>
1112           </tbody>
1113         </tgroup>
1114       </informaltable>
1115
1116       <para>New monitoring &man.sysctl.8;s haven been added:</para>
1117
1118       <informaltable frame="none" pgwide="0">
1119         <tgroup cols="2">
1120           <colspec colwidth="1*"/>
1121           <colspec colwidth="1*"/>
1122           <thead>
1123             <row>
1124               <entry>Tunable</entry>
1125               <entry>Description</entry>
1126             </row>
1127           </thead>
1128
1129           <tbody>
1130             <row>
1131               <entry><literal>net.inet.tcp.pmtud_blackhole_activated</literal></entry>
1132               <entry>Number of times the code was activated to attempt
1133                 downshifting the <acronym>MSS</acronym></entry>
1134             </row>
1135
1136             <row>
1137               <entry><literal>net.inet.tcp.pmtud_blackhole_min_activated</literal></entry>
1138               <entry>Number of times the blackhole
1139                 <acronym>MSS</acronym> was used in an attempt to
1140                 downshift</entry>
1141             </row>
1142
1143             <row>
1144               <entry><literal>net.inet.tcp.pmtud_blackhole_failed</literal></entry>
1145               <entry>Number of times that the blackhole failed to
1146                 connect after downshifting the
1147                 <acronym>MSS</acronym></entry>
1148             </row>
1149           </tbody>
1150         </tgroup>
1151       </informaltable>
1152
1153       <para revision="280971" contrib="sponsor"
1154         sponsor="&netflix;, &nginx;">Support for <acronym>IP</acronym>
1155         identification for atomic datagrams (<acronym>RFC</acronym>
1156         6864) has been added.  Support for this feature can be toggled
1157         with the <literal>net.inet.ip.rfc6864</literal>
1158         &man.sysctl.8;, which is enabled by default.</para>
1159     </sect2>
1160   </sect1>
1161
1162   <sect1 xml:id="ports">
1163     <title>Ports Collection and Package Infrastructure</title>
1164
1165     <para>This section covers changes to the &os;&nbsp;Ports
1166       Collection, package infrastructure, and package maintenance and
1167       installation tools.</para>
1168
1169     <sect2 xml:id="ports-infrastructure">
1170       <title>Infrastructure Changes</title>
1171
1172       <para>&nbsp;</para>
1173     </sect2>
1174
1175     <sect2 xml:id="ports-packages ">
1176       <title>Packaging Changes</title>
1177
1178       <para>&nbsp;</para>
1179     </sect2>
1180   </sect1>
1181
1182   <sect1 xml:id="doc">
1183     <title>Documentation</title>
1184
1185     <para>This section covers changes to the &os;&nbsp;Documentation
1186       Project sources and toolchain.</para>
1187
1188     <sect2 xml:id="doc-sources">
1189       <title>Documentation Source Changes</title>
1190
1191       <para>&nbsp;</para>
1192     </sect2>
1193
1194     <sect2 xml:id="doc-toolchain">
1195       <title>Documentation Toolchain Changes</title>
1196
1197       <para>&nbsp;</para>
1198     </sect2>
1199   </sect1>
1200
1201   <sect1 xml:id="releng">
1202     <title>Release Engineering and Integration</title>
1203
1204     <para>This section convers changes that are specific to the
1205       &os;&nbsp;Release Engineering processes.</para>
1206
1207     <sect2 xml:id="releng-changes">
1208       <title>Integration Changes</title>
1209
1210       <para revision="277458" contrib="sponsor" sponsor="&ff;">The
1211         Release Engineering build tools have been updated to include
1212         support for producing virtual machine disk images for various
1213         cloud hosting providers.</para>
1214
1215       <para revision="278926">The Release Engineering build tools have
1216         been updated to use multi-threaded &man.xz.1;.  By default,
1217         the number of &man.xz.1; threads is set to the number of cores
1218         available.</para>
1219
1220       <para revision="281802" contrib="sponsor" sponsor="&ff;">The
1221         Release Engineering build tools have been updated to include
1222         support for building &os;/&arch.arm64; virtual machine and
1223         memory stick installation images.</para>
1224     </sect2>
1225   </sect1>
1226 </article>