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
 573       <para revision="282973" contrib="sponsor" sponsor="&ff;">The
 574         <literal>libgomp</literal> library is now only built when
 575         building <acronym>GCC</acronym> from the base system.  An
 576         up-to-date version is available in the Ports Collection as
 577         <filename
 578           role="package">devel/libiomp5-devel</filename>.</para>
 579     </sect2>
 580
 581     <sect2 xml:id="userland-abi">
 582       <title>ABI Compatibility</title>
 583
 584       <para revision="271982">The &linux; compatibility version has
 585         been updated to <literal>2.6.18</literal>.  The
 586         <literal>compat.linux.osrelease</literal> &man.sysctl.8; is
 587         evaluated when building the <filename
 588           role="package">emulators/linux-c6</filename> and related
 589         ports.</para>
 590     </sect2>
 591   </sect1>
 592
 593   <sect1 xml:id="kernel">
 594     <title>Kernel</title>
 595
 596     <para>This section covers changes to kernel configurations, system
 597       tuning, and system control parameters that are not otherwise
 598       categorized.</para>
 599
 600     <sect2 xml:id="kernel-bugfix">
 601       <title>Kernel Bug Fixes</title>
 602
 603       <para revision="265876">A kernel bug that inhibited proper
 604         functionality of the <literal>dev.cpu.0.freq</literal>
 605         &man.sysctl.8; on &intel; processors with Turbo
 606         Boost&nbsp;&trade; enabled has been fixed.</para>
 607
 608       <para revision="271697" arch="powerpc">Support for
 609         &man.dtrace.1; stack tracing has been fixed for
 610         &os;/&arch.powerpc;, using the <literal>trapexit()</literal>
 611         and <literal>asttrapexit()</literal> functions instead of
 612         checking within addressed kernel space.</para>
 613
 614       <para revision="272089">A bug in &man.ipfw.4; that could
 615         potentially lead to a kernel panic when using &man.dummynet.4;
 616         at layer 2 has been fixed.</para>
 617
 618       <para revision="280930" contrib="sponsor" sponsor="&mitail;">The
 619         kernel <acronym>RPC</acronym> has been updated to include
 620         several enhancements:</para>
 621
 622       <itemizedlist>
 623         <listitem>
 624           <para>The 45 MiB limit on requests queued for
 625             &man.nfsd.8; threads has been removed.</para>
 626         </listitem>
 627
 628         <listitem>
 629           <para>Avoids unnecessary throttling by not deferring
 630             accounting for completed requests.</para>
 631         </listitem>
 632
 633         <listitem>
 634           <para>Fixes an integer overflow and signedness bugs.</para>
 635         </listitem>
 636       </itemizedlist>
 637
 638       <para revision="281261" arch="powerpc">Support for
 639         &man.dtrace.1; has been added for the
 640         Book-E&nbsp;&trade;.</para>
 641     </sect2>
 642
 643     <sect2 xml:id="kernel-config">
 644       <title>Kernel Configuration</title>
 645
 646       <para revision="266531">The <literal>IMAGACT_BINMISC</literal>
 647         kernel configuration option has been enabled by default,
 648         which enables application execution through emulators, such
 649         as <application>Qemu</application>.</para>
 650
 651       <para revision="268045">The <literal>VT</literal> kernel
 652         configuration file has been removed, and the &man.vt.4;
 653         driver is included in the <literal>GENERIC</literal> kernel.
 654         To enable &man.vt.4;, enter <literal>set kern.vty=vt</literal>
 655         at the &man.loader.8; prompt during boot, or add
 656         <literal>kern.vty=vt</literal> to &man.loader.conf.5; and
 657         reboot the system.</para>
 658
 659       <para revision="277904">The &man.config.8; utility has been
 660         updated to allow using a non-standard <filename
 661           class="directory">src/</filename> tree, specified as an
 662         argument to the <literal>-s</literal> flag.</para>
 663
 664       <para revision="277990" arch="powerpc64">The
 665         &os;/&arch.powerpc64; kernel now builds as
 666         a position-independent executable, allowing the kernel to be
 667         loaded into and run from any physical or virtual
 668         address.</para>
 669
 670       <important>
 671         <para>This change requires an update to &man.loader.8;.
 672           The userland and kernel must be updated before rebooting the
 673           system.</para>
 674       </important>
 675
 676       <para revision="279189" contrib="sponsor" sponsor="&ff;"
 677         arch="powerpc">Kernel support for Vector-Scalar eXtension
 678         (<acronym>VSX</acronym>) found on POWER7 and POWER8 hardware
 679         has been added.</para>
 680
 681       <para revision="279252" contrib="sponsor" sponsor="&ff;"
 682         arch="powerpc">The &man.pmap.9; implementation for 64-bit
 683         &powerpc; processors has been overhaulded to improve
 684         concurrency.</para>
 685     </sect2>
 686
 687     <sect2 xml:id="kernel-sysctl">
 688       <title>System Tuning and Controls</title>
 689
 690       <para revision="275140" contrib="sponsor" sponsor="&ff;">The
 691         &man.hwpmc.4; default and maximum callchain depths have been
 692         increased.  The default has been increased from 16 to 32, and
 693         the maximum increased from 32 to 128.</para>
 694
 695       <para revision="279361">The <literal>kern.osrelease</literal>
 696         and <literal>kern.osreldate</literal> are now configurable
 697         &man.jail.8; parameters.</para>
 698
 699       <para revision="280308,280949" contrib="sponsor"
 700         sponsor="&ix;, &ff;">The &man.devfs.5; device filesystem has
 701         been changed to update timestamps for read/write operations
 702         using seconds precision.  A new &man.sysctl.8;,
 703         <literal>vfs.devfs.dotimes</literal> has been added, which
 704         when set to a non-zero value, enables default precision
 705         timestamps for these operations.</para>
 706
 707       <para revision="282213" contrib="sponsor" sponsor="&ff;">A new
 708         &man.sysctl.8;, <literal>kern.racct.enable</literal>, has been
 709         added, which when set to a non-zero value allows using
 710         &man.rctl.8; with the <literal>GENERIC</literal> kernel.
 711         A new kernel configuration option,
 712         <literal>RACCT_DISABLED</literal> has also been added.</para>
 713
 714       <para revision="282901" contrib="sponsor" sponsor="&ff;">The
 715         <literal>GENERIC</literal> kernel configuration now includes
 716         <literal>RACCT</literal> and <literal>RCTL</literal> by
 717         default.</para>
 718
 719       <note>
 720         <para>To enable <literal>RACCT</literal> and
 721           <literal>RCTL</literal> on a system using the
 722           <literal>GENERIC</literal> kernel configuration, add
 723           <literal>kern.racct.enable=1</literal> to
 724           &man.loader.conf.5;, and reboot the system.</para>
 725       </note>
 726     </sect2>
 727   </sect1>
 728
 729   <sect1 xml:id="drivers">
 730     <title>Devices and Drivers</title>
 731
 732     <para>This section covers changes and additions to devices and
 733       device drivers since &release.prev;.</para>
 734
 735     <sect2 xml:id="drivers-device">
 736       <title>Device Drivers</title>
 737
 738       <para revision="260903">Support for GPS ports has been added to
 739         &man.uhso.4;.</para>
 740
 741       <para revision="265132">The &man.full.4; device has been added,
 742         and the <literal>lindev(4)</literal> device has been removed.
 743         Prior to this change, <literal>lindev(4)</literal> provided
 744         only the <filename>/dev/full</filename> character device,
 745         returning <literal>ENOSPC</literal> on write attempts.  As
 746         this device is not specific to &linux;, a native &os; version
 747         has been added.</para>
 748
 749       <para revision="271705">Hardware context support has been
 750         added to the <literal>drm/i915</literal> driver, adding
 751         support for <application>Mesa</application> 9.2 and
 752         later.</para>
 753
 754       <para revision="273178">The &man.vt.4; driver has been updated,
 755         replacing the bitmapped <literal>kern.vt.spclkeys</literal>
 756         &man.sysctl.8; with individual
 757         <literal>kern.vt.kbd_*</literal> variants.</para>
 758
 759       <para revision="273598">The &man.hpet.4; driver has been updated
 760         to create a
 761         <filename>/dev/hpet<replaceable>N</replaceable></filename>
 762         device, providing access to <acronym>HPET</acronym> from
 763         userspace.</para>
 764
 765       <para revision="280183">The <literal>drm</literal> code has
 766         been updated to match &linux; version 3.8.13.</para>
 767
 768       <para revision="282783" arch="powerpc">Support for the Freescale
 769         <acronym>PCI</acronym> Root Complex device has been
 770         added.</para>
 771     </sect2>
 772
 773     <sect2 xml:id="drivers-storage">
 774       <title>Storage Drivers</title>
 775
 776       <para revision="265236" contrib="sponsor"
 777         sponsor="&lsi;, &spectralogic;" sponsorurl="">The &man.mpr.4;
 778         device has been added, providing support for LSI Fusion-MPT
 779         3 12Gb SCSI/SATA controllers.</para>
 780
 781       <para revision="265555" contrib="sponsor"
 782           sponsor="&lsi;">The &man.mrsas.4; driver has been added,
 783         providing support for LSI MegaRAID SAS controllers.  The
 784         &man.mfi.4; driver will attach to the controller, by default.
 785         To enable &man.mrsas.4; add
 786         <literal>hw.mfi.mrsas_enable=1</literal> to
 787         <filename>/boot/loader.conf</filename>, which turns off
 788         &man.mfi.4; device probing.</para>
 789
 790       <note>
 791         <para>At this time, the &man.mfiutil.8; utility and the &os;
 792           version of <application>MegaCLI</application> and
 793           <application>StorCli</application> do not work with
 794           &man.mrsas.4;.</para>
 795       </note>
 796
 797       <para revision="275461" contrib="sponsor" sponsor="&ix;">The
 798         &man.ctl.4; subsystem has been updated, increasing the ports
 799         limit from <literal>128</literal> to <literal>256</literal>,
 800         and <acronym>LUN</acronym> limit from <literal>256</literal>
 801         to <literal>1024</literal>.</para>
 802
 803       <para revision="276526">The <literal>asr(4)</literal> driver has
 804         been removed, and is no longer supported.</para>
 805
 806       <para revision="281387">The &man.hptnr.4; driver has been
 807         updated to version 1.1.1.</para>
 808     </sect2>
 809
 810     <sect2 xml:id="drivers-network">
 811       <title>Network Drivers</title>
 812
 813       <para revision="258830">Support for Broadcom chipsets BCM57764,
 814         BCM57767, BCM57782, BCM57786 and BCM57787 has been added to
 815         &man.bge.4;.</para>
 816
 817       <para revision="260448">Support for the &intel; Centrino&trade;
 818         Wireless-N 135 chipset has been added.</para>
 819
 820       <para revision="260552">Firmware for &intel; Centrino&trade;
 821         Wireless-N 105 devices has been added to the base
 822         system.</para>
 823
 824       <para revision="261975">The deprecated nve(4) driver has been
 825         removed.  Users of NVIDIA nForce MCP network adapters are
 826         advised to use the &man.nfe.4; driver instead, which has been
 827         the default driver for this hardware since
 828         &os;&nbsp;7.0.</para>
 829
 830       <para revision="264601" contrib="sponsor"
 831         sponsor="&darpa_afrl;">The <literal>if_nf10bmac(4)</literal>
 832         device has been added, providing support for NetFPGA-10G
 833         Embedded CPU Ethernet Core.</para>
 834
 835       <note>
 836         <para>The <literal>if_nf10bmac(4)</literal> driver operates on
 837           the FPGA, and is not suited for the PCI host
 838           interface.</para>
 839       </note>
 840
 841       <para revision="265348" contrib="sponsor"
 842         sponsor="&netgate;">The &man.ath.hal.4; driver has been
 843         updated to support the Atheros AR1111 chipset.</para>
 844
 845       <para revision="266770">Support for the &intel; Centrino&trade;
 846         Wireless-N 105 chipset has been added.</para>
 847
 848       <para revision="266757" contrib="sponsor"
 849         sponsor="&chelsio;">Support for the &man.cxgbe.4; Terminator
 850         5 (T5) 10G/40G cards has been added to &man.netmap.4;.</para>
 851
 852       <para revision="272730">The &man.alc.4; driver has been updated
 853         to support AR816x and AR817x ethernet controllers.</para>
 854
 855       <para revision="273331">The &man.vxlan.4; driver has been added,
 856         which creates a virtual Layer 2 (Ethernet) network overlaid in
 857         a Layer 3 (IP/UDP) network.  The &man.vxlan.4; driver is
 858         analogous to &man.vlan.4;, but is designed to be better suited
 859         for large, multiple-tenant datacenter environments.</para>
 860
 861       <para revision="274246" contrib="sponsor" sponsor="&yandex;">The
 862         &man.gre.4; driver has been significantly overhauled, and has
 863         been split into two separate modules, &man.gre.4; and
 864         &man.me.4;.</para>
 865     </sect2>
 866   </sect1>
 867
 868   <sect1 xml:id="hardware">
 869     <title>Hardware Support</title>
 870
 871     <para>This section covers general hardware support for physical
 872       machines, hypervisors, and virtualization environments, as well
 873       as hardware changes and updates that do not otherwise fit in
 874       other sections of this document.</para>
 875
 876     <sect2 xml:id="hardware-support">
 877       <title>Hardware Support</title>
 878
 879       <para revision="268303">The &man.asmc.4; driver has been
 880         updated to support the &apple;&nbsp;MacMini 3,1.</para>
 881
 882       <para revision="268351">Support for &os;/ia64 has been dropped
 883         as of &os;&nbsp;11.</para>
 884
 885       <para revision="274386">An issue that could cause a system to
 886         hang when entering <acronym>ACPI</acronym>
 887         <literal>S3</literal> state (suspend to
 888         <acronym>RAM</acronym>) has been corrected in the &man.acpi.4;
 889         and &man.pci.4; drivers.</para>
 890
 891       <para revision="274733" arch="powerpc">The power management unit
 892         subsystem has been updated to support power button events on
 893         certain &arch.powerpc; hardware, such as aluminum
 894         PowerBook&nbsp;&reg;.</para>
 895
 896       <para revision="275171,275190" arch="powerpc">The &man.hwpmc.4;
 897         driver has been updated to correct performance counter
 898         sampling on G4 (MPC74xxx) and G5 class processors.</para>
 899
 900       <para revision="281713" arch="powerpc">The &man.hwpmc.4;
 901         driver has been updated to support the Freescale e500
 902         core.</para>
 903
 904       <para revision="275732" contrib="sponsor"
 905         sponsor="&ff;,&netgate;">The
 906         <application>OpenCrypto</application> framework has been
 907         updated to include <literal>AES-ICM</literal> and
 908         <literal>AES-GCM</literal> modes, both of which have also been
 909         added to the &man.aesni.4; driver.</para>
 910     </sect2>
 911
 912     <sect2 xml:id="hardware-virtualization">
 913       <title>Virtualization Support</title>
 914
 915       <para revision="260410">Support for the <quote>Virtual Interrupt
 916           Delivery</quote> feature of &intel;&nbsp;VT-x is enabled if
 917         supported by the CPU.  This feature can be disabled by running
 918         <literal>sysctl hw.vmm.vmx.use_apic_vid=0</literal>.
 919         Additionally, to persist this setting across reboots, add
 920         <literal>hw.vmm.vmx.use_apic_vid=0</literal> to
 921         <filename>/etc/sysctl.conf</filename>.</para>
 922
 923       <para revision="260532">Support for <quote>Posted Interrupt
 924           Processing</quote> is enabled if supported by the CPU.  This
 925         feature can be disabled by running <literal>sysctl
 926           hw.vmm.vmx.use_apic_pir=0</literal>.  Additionally, to
 927         persist this setting across reboots, add
 928         <literal>hw.vmm.vmx.use_apic_pir=0</literal> to
 929         <filename>/etc/sysctl.conf</filename>.</para>
 930
 931       <para revision="260582">Unmapped IO support has been added to
 932         &man.virtio_blk.4;.</para>
 933
 934       <para revision="260583">Unmapped IO support has been added to
 935         &man.virtio_scsi.4;.</para>
 936
 937       <para revision="260847">The &man.virtio_random.4; driver has
 938         been added to harvest entropy from the host system.</para>
 939
 940       <para revision="261504">&os;/&arch.i386; guests can be run under
 941         bhyve.</para>
 942
 943       <para revision="267536" contrib="sponsor"
 944         sponsor="&citrix.rd;">Support for running a &os;/&arch.amd64;
 945         <application>Xen</application> guest instance as
 946         <acronym>PVH</acronym> guest has been added.
 947         <acronym>PVH</acronym> mode, short for <quote>Para-Virtualized
 948           Hardware</quote>, uses para-virtualized drivers for boot and
 949         I/O, and uses hardware virtualization extensions for all other
 950         tasks, without the need for emulation.</para>
 951
 952       <para revision="273515">The &man.virtio.console.4; driver has
 953         been added, which provides an interface to VirtIO console
 954         devices through a &man.tty.4; device.</para>
 955
 956       <para revision="279957">The &man.bhyve.8; hypervisor has been
 957         updated to support <literal>DSM TRIM</literal> commands for
 958         virtual <acronym>AHCI</acronym> disks.</para>
 959
 960       <para revision="281439" arch="arm">Support for the
 961         <application>QEMU</application> <literal>virt</literal> system
 962         has been added.</para>
 963
 964       <para revision="282212" contrib="sponsor" sponsor="&msostc;">The
 965         HyperV&trade; drivers have been updated with several
 966         enhancements:</para>
 967
 968       <itemizedlist>
 969         <listitem>
 970           <para>The &man.hv.vmbus.4; driver now has multi-channel
 971             support.</para>
 972         </listitem>
 973
 974         <listitem>
 975           <para>The &man.hv.storvsc.4; driver now has scatter/gather
 976             support, in addition to performance improvements.</para>
 977         </listitem>
 978
 979         <listitem>
 980           <para>The &man.hv.kvp.4; driver has received several bug
 981             fixes.</para>
 982         </listitem>
 983       </itemizedlist>
 984
 985       <para revision="282274">Support for &man.xen.4; para-virtualized
 986         <literal>domU</literal> kernels has been removed.</para>
 987     </sect2>
 988
 989     <sect2 xml:id="hardware-arm">
 990       <title>ARM Support</title>
 991
 992       <para revision="260921">The &man.nand.4; device is enabled for
 993         ARM devices by default.</para>
 994
 995       <para revision="273264" arch="armv6">An issue that could cause
 996         instability when detecting <acronym>SD</acronym> cards on the
 997         Raspberry Pi <acronym>SOC</acronym> has been fixed.</para>
 998
 999       <para revision="275963">The <literal>bcm2835_cpufreq</literal>
1000         driver has been added, which supports <acronym>CPU</acronym>
1001         frequency and voltage control on the Raspberry Pi
1002         <acronym>SOC</acronym>.</para>
1003
1004       <para revision="280259" contrib="sponsor" sponsor="&ff;">Initial
1005         support for the ARM AArch64 architecture has been
1006         added.</para>
1007
1008       <para revision="282779" arch="arm">Kernel support for Thumb-2
1009         has been added.</para>
1010
1011       <para revision="282827">Support for the hardware power button
1012         on the BeagleBone Black system has been added.</para>
1013     </sect2>
1014   </sect1>
1015
1016   <sect1 xml:id="storage">
1017     <title>Storage</title>
1018
1019     <para>This section covers changes and additions to file systems
1020       and other storage subsystems, both local and networked.</para>
1021
1022     <sect2 xml:id="storage-general">
1023       <title>General Storage</title>
1024
1025       <para revision="278037" contrib="sponsor" sponsor="&ix;">The
1026         &man.ctl.4; <acronym>LUN</acronym> mapping has been rewritten,
1027         replacing <acronym>iSCSI</acronym>-specific mapping mechanisms
1028         with a new mechanism that works for any port.</para>
1029
1030       <para revision="278354" contrib="sponsor" sponsor="&ix;">The
1031         &man.ctld.8; utility has been updated to allow controlling
1032         non-<acronym>iSCSI</acronym> &man.ctl.4; ports.</para>
1033     </sect2>
1034
1035     <sect2 xml:id="storage-net">
1036       <title>Networked Storage</title>
1037
1038       <para revision="270096" contrib="sponsor" sponsor="&ff;">The new
1039         filesystem automount facility, &man.autofs.5;, has been added.
1040         The new &man.autofs.5; facility is similar to that found in
1041         other &unix;-like operating systems, such as OS&nbsp;X&trade;
1042         and Solaris&trade;.  The &man.autofs.5; facility uses
1043         a &sun;-compatible &man.auto.master.5; configuration file, and
1044         is administered with the &man.automount.8; userland utility,
1045         and the &man.automountd.8; and &man.autounmountd.8;
1046         daemons.</para>
1047     </sect2>
1048
1049     <sect2 xml:id="storage-zfs">
1050       <title>ZFS</title>
1051
1052       <para revision="275748">The <literal>arc_meta_limit</literal>
1053         statistics are now visible through the
1054         <literal>kstat</literal> &man.sysctl.8;.  As a result of this
1055         change, the <literal>vfs.zfs.arc_meta_used</literal>
1056         &man.sysctl.8; has been removed, and replaced with the
1057         <literal>kstat.zfs.misc.arcstats.arc_meta_used</literal>
1058         &man.sysctl.8;.</para>
1059     </sect2>
1060
1061     <sect2 xml:id="storage-geom">
1062       <title>&man.geom.4;</title>
1063
1064       <para revision="267359">Support for the
1065         <literal>disklabel64</literal> partitioning scheme has been
1066         added to &man.gpart.8;.</para>
1067     </sect2>
1068   </sect1>
1069
1070   <sect1 xml:id="boot">
1071     <title>Boot Loader Changes</title>
1072
1073     <para>This section covers the boot loader, boot menu, and other
1074       boot-related changes.</para>
1075
1076     <sect2 xml:id="boot-loader">
1077       <title>Boot Loader Changes</title>
1078
1079       <para revision="274085">The &man.vt.4; driver has been made the
1080         default system console driver.  The &man.syscons.4; driver is
1081         still available, and can be enabled by adding
1082         <literal>kern.vty=sc</literal> in &man.loader.conf.5;.
1083         Alternatively, &man.syscons.4; can be enabled at boot time by
1084         entering <literal>set kern.vty=sc</literal> at the
1085         &man.loader.8; prompt.</para>
1086
1087       <para revision="281616">The boot loader has been updated to
1088         support entering the <acronym>GELI</acronym> passphrase before
1089         loading the kernel.  To enable this behavior, add
1090         <literal>geom_eli_passphrase_prompt="YES"</literal> to
1091         &man.loader.conf.5;.</para>
1092     </sect2>
1093
1094     <sect2 xml:id="boot-menu">
1095       <title>Boot Menu Changes</title>
1096
1097       <para>&nbsp;</para>
1098     </sect2>
1099   </sect1>
1100
1101   <sect1 xml:id="network">
1102     <title>Networking</title>
1103
1104     <para>This section describes changes that affect networking in
1105       &os;.</para>
1106
1107     <sect2 xml:id="network-protocols">
1108       <title>Network Procols</title>
1109
1110       <para revision="263140">Support for the IPX network transport
1111         protocol has been removed, and will not be supported in
1112         &os;&nbsp;11 and later releases.</para>
1113
1114       <para revision="272720" contrib="sponsor"
1115         sponsor="&limelight;">Support for <acronym>PLPMTUD</acronym>
1116         blackhole detection (<acronym>RFC</acronym> 4821) has been
1117         added to the &man.tcp.4; stack, disabled by default.  New
1118         control tunables have been added:</para>
1119
1120       <informaltable frame="none" pgwide="0">
1121         <tgroup cols="2">
1122           <colspec colwidth="1*"/>
1123           <colspec colwidth="1*"/>
1124           <thead>
1125             <row>
1126               <entry>Tunable</entry>
1127               <entry>Description</entry>
1128             </row>
1129           </thead>
1130
1131           <tbody>
1132             <row>
1133               <entry><literal>net.inet.tcp.pmtud_blackhole_detection</literal></entry>
1134               <entry>Enables or disables <acronym>PLPMTUD</acronym>
1135                 blackhole detection</entry>
1136             </row>
1137
1138             <row>
1139               <entry><literal>net.inet.tcp.pmtud_blackhole_mss</literal></entry>
1140               <entry><acronym>MSS</acronym> to try for IPv4</entry>
1141             </row>
1142
1143             <row>
1144               <entry><literal>net.inet.tcp.v6pmtud_blackhole_mss</literal></entry>
1145               <entry><acronym>MSS to try for IPv6</acronym></entry>
1146             </row>
1147           </tbody>
1148         </tgroup>
1149       </informaltable>
1150
1151       <para>New monitoring &man.sysctl.8;s haven been added:</para>
1152
1153       <informaltable frame="none" pgwide="0">
1154         <tgroup cols="2">
1155           <colspec colwidth="1*"/>
1156           <colspec colwidth="1*"/>
1157           <thead>
1158             <row>
1159               <entry>Tunable</entry>
1160               <entry>Description</entry>
1161             </row>
1162           </thead>
1163
1164           <tbody>
1165             <row>
1166               <entry><literal>net.inet.tcp.pmtud_blackhole_activated</literal></entry>
1167               <entry>Number of times the code was activated to attempt
1168                 downshifting the <acronym>MSS</acronym></entry>
1169             </row>
1170
1171             <row>
1172               <entry><literal>net.inet.tcp.pmtud_blackhole_min_activated</literal></entry>
1173               <entry>Number of times the blackhole
1174                 <acronym>MSS</acronym> was used in an attempt to
1175                 downshift</entry>
1176             </row>
1177
1178             <row>
1179               <entry><literal>net.inet.tcp.pmtud_blackhole_failed</literal></entry>
1180               <entry>Number of times that the blackhole failed to
1181                 connect after downshifting the
1182                 <acronym>MSS</acronym></entry>
1183             </row>
1184           </tbody>
1185         </tgroup>
1186       </informaltable>
1187
1188       <para revision="280971" contrib="sponsor"
1189         sponsor="&netflix;, &nginx;">Support for <acronym>IP</acronym>
1190         identification for atomic datagrams (<acronym>RFC</acronym>
1191         6864) has been added.  Support for this feature can be toggled
1192         with the <literal>net.inet.ip.rfc6864</literal>
1193         &man.sysctl.8;, which is enabled by default.</para>
1194     </sect2>
1195   </sect1>
1196
1197   <sect1 xml:id="ports">
1198     <title>Ports Collection and Package Infrastructure</title>
1199
1200     <para>This section covers changes to the &os;&nbsp;Ports
1201       Collection, package infrastructure, and package maintenance and
1202       installation tools.</para>
1203
1204     <sect2 xml:id="ports-infrastructure">
1205       <title>Infrastructure Changes</title>
1206
1207       <para>&nbsp;</para>
1208     </sect2>
1209
1210     <sect2 xml:id="ports-packages ">
1211       <title>Packaging Changes</title>
1212
1213       <para>&nbsp;</para>
1214     </sect2>
1215   </sect1>
1216
1217   <sect1 xml:id="doc">
1218     <title>Documentation</title>
1219
1220     <para>This section covers changes to the &os;&nbsp;Documentation
1221       Project sources and toolchain.</para>
1222
1223     <sect2 xml:id="doc-sources">
1224       <title>Documentation Source Changes</title>
1225
1226       <para>&nbsp;</para>
1227     </sect2>
1228
1229     <sect2 xml:id="doc-toolchain">
1230       <title>Documentation Toolchain Changes</title>
1231
1232       <para>&nbsp;</para>
1233     </sect2>
1234   </sect1>
1235
1236   <sect1 xml:id="releng">
1237     <title>Release Engineering and Integration</title>
1238
1239     <para>This section convers changes that are specific to the
1240       &os;&nbsp;Release Engineering processes.</para>
1241
1242     <sect2 xml:id="releng-changes">
1243       <title>Integration Changes</title>
1244
1245       <para revision="277458" contrib="sponsor" sponsor="&ff;">The
1246         Release Engineering build tools have been updated to include
1247         support for producing virtual machine disk images for various
1248         cloud hosting providers.</para>
1249
1250       <para revision="278926">The Release Engineering build tools have
1251         been updated to use multi-threaded &man.xz.1;.  By default,
1252         the number of &man.xz.1; threads is set to the number of cores
1253         available.</para>
1254
1255       <para revision="281802" contrib="sponsor" sponsor="&ff;">The
1256         Release Engineering build tools have been updated to include
1257         support for building &os;/&arch.arm64; virtual machine and
1258         memory stick installation images.</para>
1259     </sect2>
1260   </sect1>
1261 </article>