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: 282146 -->
  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     </sect2>
 441
 442     <sect2 xml:id="userland-installer">
 443       <title>Installation and Configuration Tools</title>
 444
 445       <para revision="271539">The &man.bsdinstall.8; partition editor
 446         and &man.sade.8; utility have been updated to include native
 447         <acronym>ZFS</acronym> support.</para>
 448
 449       <para revision="272274">The &os; installation utility,
 450         &man.bsdinstall.8;, has been updated to set the
 451         <literal>canmount</literal> &man.zfs.8; property to
 452         <literal>off</literal> for the <filename
 453           class="directory">/var</filename> dataset, preventing the
 454         contents of directories within <filename
 455           class="directory">/var</filename> from conflicting when
 456         using multiple boot environments, such as that provided by
 457         <filename role="package">sysutils/beadm</filename>.</para>
 458
 459       <para revision="274394">The &man.bsdconfig.8; utility has been
 460         updated to skip the initial &man.tzsetup.8;
 461         <acronym>UTC</acronym> versus wall-clock time prompt when run
 462         in a virtual machine, determined when the
 463         <literal>kern.vm_guest</literal> &man.sysctl.8; is set to
 464         <literal>1</literal>.</para>
 465
 466       <para revision="275874">The &man.bsdinstall.8; utility has been
 467         updated to use the new &man.dpv.3; library to display progress
 468         when extracting the &os; distributions.</para>
 469     </sect2>
 470
 471     <sect2 xml:id="userland-rc">
 472       <title><filename class="directory">/etc/rc.d</filename>
 473         Scripts</title>
 474
 475       <para revision="270676">The &man.rc.8; subsystem has been
 476         updated to allow configuring services in <filename
 477           class="directory">&dollar;{LOCALBASE}/etc/rc.conf.d/</filename>.
 478         If <literal>LOCALBASE</literal> is unset, it defaults to
 479         <filename class="directory">/usr/local</filename>.</para>
 480
 481       <para revision="275299">The <filename>mrouted</filename>
 482         &man.rc.8; script has been removed from the base system.  An
 483         equivalent script is available from the <filename
 484           role="package">net/mrouted</filename> port.</para>
 485
 486       <para revision="279463" contrib="sponsor"
 487         sponsor="&sandvine;">A new &man.rc.8; script,
 488         <filename>iovctl</filename>, has been added, which allows
 489         automatically starting the &man.iovctl.8; utility at
 490         boot.</para>
 491     </sect2>
 492
 493     <sect2 xml:id="userland-periodic">
 494       <title><filename class="directory">/etc/periodic</filename>
 495         Scripts</title>
 496
 497       <para revision="271321">The daily &man.periodic.8; script
 498         <filename>110.clean-tmps</filename> has been updated to avoid
 499         crossing filesystem mount boundaries when cleaning files in
 500         <filename class="directory">/tmp</filename>.</para>
 501     </sect2>
 502
 503     <sect2 xml:id="userland-libraries">
 504       <title>Runtime Libraries and API</title>
 505
 506       <para revision="268461">The &man.readline.3; library is now
 507         statically linked in software within the base system, and the
 508         shared library is no longer installed, allowing the Ports
 509         Collection to use a modern version of the library.</para>
 510
 511       <para revision="272273">The &man.strptime.3; library has been
 512         updated to add support for <acronym>POSIX</acronym>-2001
 513         features <literal>%U</literal> and
 514         <literal>%W</literal>.</para>
 515
 516       <para revision="272842,272848" contrib="sponsor"
 517         sponsor="&ff;">The &man.dl.iterate.phdr.3; library has been
 518         changed to always return the path name of the
 519         <acronym>ELF</acronym> object in the
 520         <literal>dlpi_name</literal> structure member.</para>
 521
 522       <para revision="273562" contrib="sponsor"
 523         sponsor="&juniper;">The &man.libxo.3; library has been
 524         imported to the base system.</para>
 525
 526       <para revision="273806" contrib="sponsor" sponsor="&chelsio;">A
 527         userland library for Chelsio Terminator 5 based iWARP cards
 528         has been added, allowing userland <acronym>RDMA</acronym>
 529         applications to work over compatible
 530         <acronym>NIC</acronym>s.</para>
 531
 532       <para revision="274987">The &man.gpio.3; library has been added,
 533         providing a wrapper around the &man.gpio.4; kernel
 534         interface.</para>
 535
 536       <para revision="277610">The <literal>futimens()</literal> and
 537         <literal>utimensat()</literal> system calls have been
 538         added.  See &man.utimensat.2; for more information.</para>
 539
 540       <para revision="278934">The &man.elf.3; compile-time dependency
 541         has been removed from <filename>dtri.o</filename>, which
 542         allows adding <application>DTrace</application> probes to
 543         userland applications and libraries without also linking
 544         against &man.elf.3;.</para>
 545
 546       <para revision="279186">The &man.setmode.3; function has been
 547         updated to consistently set <literal>errno</literal> on
 548         failure.</para>
 549
 550       <para revision="279663">The &man.qsort.3; functions have been
 551         updated to be able to handle 32-bit aligned data on 64-bit
 552         platforms, also providing a significant improvement in 32-bit
 553         workloads.</para>
 554
 555       <para revision="281130">Several standard include headers have
 556         been updated to use of <application>gcc</application>
 557         attributes, such as <literal>__result_use_check()</literal>,
 558         <literal>__alloc_size()</literal>, and
 559         <literal>__nonnull()</literal>.</para>
 560
 561       <para revision="281845">Support for file verification in
 562         <acronym>MAC</acronym> has been added.</para>
 563     </sect2>
 564
 565     <sect2 xml:id="userland-abi">
 566       <title>ABI Compatibility</title>
 567
 568       <para revision="271982">The &linux; compatibility version has
 569         been updated to <literal>2.6.18</literal>.  The
 570         <literal>compat.linux.osrelease</literal> &man.sysctl.8; is
 571         evaluated when building the <filename
 572           role="package">emulators/linux-c6</filename> and related
 573         ports.</para>
 574     </sect2>
 575   </sect1>
 576
 577   <sect1 xml:id="kernel">
 578     <title>Kernel</title>
 579
 580     <para>This section covers changes to kernel configurations, system
 581       tuning, and system control parameters that are not otherwise
 582       categorized.</para>
 583
 584     <sect2 xml:id="kernel-bugfix">
 585       <title>Kernel Bug Fixes</title>
 586
 587       <para revision="265876">A kernel bug that inhibited proper
 588         functionality of the <literal>dev.cpu.0.freq</literal>
 589         &man.sysctl.8; on &intel; processors with Turbo
 590         Boost&nbsp;&trade; enabled has been fixed.</para>
 591
 592       <para revision="271697" arch="powerpc">Support for
 593         &man.dtrace.1; stack tracing has been fixed for
 594         &os;/&arch.powerpc;, using the <literal>trapexit()</literal>
 595         and <literal>asttrapexit()</literal> functions instead of
 596         checking within addressed kernel space.</para>
 597
 598       <para revision="272089">A bug in &man.ipfw.4; that could
 599         potentially lead to a kernel panic when using &man.dummynet.4;
 600         at layer 2 has been fixed.</para>
 601
 602       <para revision="280930" contrib="sponsor" sponsor="&mitail;">The
 603         kernel <acronym>RPC</acronym> has been updated to include
 604         several enhancements:</para>
 605
 606       <itemizedlist>
 607         <listitem>
 608           <para>The 45 MiB limit on requests queued for
 609             &man.nfsd.8; threads has been removed.</para>
 610         </listitem>
 611
 612         <listitem>
 613           <para>Avoids unnecessary throttling by not deferring
 614             accounting for completed requests.</para>
 615         </listitem>
 616
 617         <listitem>
 618           <para>Fixes an integer overflow and signedness bugs.</para>
 619         </listitem>
 620       </itemizedlist>
 621
 622       <para revision="281261" arch="powerpc">Support for
 623         &man.dtrace.1; has been added for the
 624         Book-E&nbsp;&trade;.</para>
 625     </sect2>
 626
 627     <sect2 xml:id="kernel-config">
 628       <title>Kernel Configuration</title>
 629
 630       <para revision="266531">The <literal>IMAGACT_BINMISC</literal>
 631         kernel configuration option has been enabled by default,
 632         which enables application execution through emulators, such
 633         as <application>Qemu</application>.</para>
 634
 635       <para revision="268045">The <literal>VT</literal> kernel
 636         configuration file has been removed, and the &man.vt.4;
 637         driver is included in the <literal>GENERIC</literal> kernel.
 638         To enable &man.vt.4;, enter <literal>set kern.vty=vt</literal>
 639         at the &man.loader.8; prompt during boot, or add
 640         <literal>kern.vty=vt</literal> to &man.loader.conf.5; and
 641         reboot the system.</para>
 642
 643       <para revision="277904">The &man.config.8; utility has been
 644         updated to allow using a non-standard <filename
 645           class="directory">src/</filename> tree, specified as an
 646         argument to the <literal>-s</literal> flag.</para>
 647
 648       <para revision="277990" arch="powerpc64">The
 649         &os;/&arch.powerpc64; kernel now builds as
 650         a position-independent executable, allowing the kernel to be
 651         loaded into and run from any physical or virtual
 652         address.</para>
 653
 654       <important>
 655         <para>This change requires an update to &man.loader.8;.
 656           The userland and kernel must be updated before rebooting the
 657           system.</para>
 658       </important>
 659
 660       <para revision="279189" contrib="sponsor" sponsor="&ff;"
 661         arch="powerpc">Kernel support for Vector-Scalar eXtension
 662         (<acronym>VSX</acronym>) found on POWER7 and POWER8 hardware
 663         has been added.</para>
 664
 665       <para revision="279252" contrib="sponsor" sponsor="&ff;"
 666         arch="powerpc">The &man.pmap.9; implementation for 64-bit
 667         &powerpc; processors has been overhaulded to improve
 668         concurrency.</para>
 669     </sect2>
 670
 671     <sect2 xml:id="kernel-sysctl">
 672       <title>System Tuning and Controls</title>
 673
 674       <para revision="275140" contrib="sponsor" sponsor="&ff;">The
 675         &man.hwpmc.4; default and maximum callchain depths have been
 676         increased.  The default has been increased from 16 to 32, and
 677         the maximum increased from 32 to 128.</para>
 678
 679       <para revision="279361">The <literal>kern.osrelease</literal>
 680         and <literal>kern.osreldate</literal> are now configurable
 681         &man.jail.8; parameters.</para>
 682
 683       <para revision="280308,280949" contrib="sponsor"
 684         sponsor="&ix;, &ff;">The &man.devfs.5; device filesystem has
 685         been changed to update timestamps for read/write operations
 686         using seconds precision.  A new &man.sysctl.8;,
 687         <literal>vfs.devfs.dotimes</literal> has been added, which
 688         when set to a non-zero value, enables default precision
 689         timestamps for these operations.</para>
 690
 691       <para revision="282213" contrib="sponsor" sponsor="&ff;">A new
 692         &man.sysctl.8;, <literal>kern.racct.enable</literal>, has been
 693         added, which when set to a non-zero value allows using
 694         &man.rctl.8; with the <literal>GENERIC</literal> kernel. A new
 695         kernel configuration option, <literal>RACCT_DISABLED</literal>
 696         has also been added.</para>
 697     </sect2>
 698   </sect1>
 699
 700   <sect1 xml:id="drivers">
 701     <title>Devices and Drivers</title>
 702
 703     <para>This section covers changes and additions to devices and
 704       device drivers since &release.prev;.</para>
 705
 706     <sect2 xml:id="drivers-device">
 707       <title>Device Drivers</title>
 708
 709       <para revision="260903">Support for GPS ports has been added to
 710         &man.uhso.4;.</para>
 711
 712       <para revision="265132">The &man.full.4; device has been added,
 713         and the <literal>lindev(4)</literal> device has been removed.
 714         Prior to this change, <literal>lindev(4)</literal> provided
 715         only the <filename>/dev/full</filename> character device,
 716         returning <literal>ENOSPC</literal> on write attempts.  As
 717         this device is not specific to &linux;, a native &os; version
 718         has been added.</para>
 719
 720       <para revision="271705">Hardware context support has been
 721         added to the <literal>drm/i915</literal> driver, adding
 722         support for <application>Mesa</application> 9.2 and
 723         later.</para>
 724
 725       <para revision="273178">The &man.vt.4; driver has been updated,
 726         replacing the bitmapped <literal>kern.vt.spclkeys</literal>
 727         &man.sysctl.8; with individual
 728         <literal>kern.vt.kbd_*</literal> variants.</para>
 729
 730       <para revision="273598">The &man.hpet.4; driver has been updated
 731         to create a
 732         <filename>/dev/hpet<replaceable>N</replaceable></filename>
 733         device, providing access to <acronym>HPET</acronym> from
 734         userspace.</para>
 735
 736       <para revision="280183">The <literal>drm</literal> code has
 737         been updated to match &linux; version 3.8.13.</para>
 738     </sect2>
 739
 740     <sect2 xml:id="drivers-storage">
 741       <title>Storage Drivers</title>
 742
 743       <para revision="265236" contrib="sponsor"
 744         sponsor="&lsi;, &spectralogic;" sponsorurl="">The &man.mpr.4;
 745         device has been added, providing support for LSI Fusion-MPT
 746         3 12Gb SCSI/SATA controllers.</para>
 747
 748       <para revision="265555" contrib="sponsor"
 749           sponsor="&lsi;">The &man.mrsas.4; driver has been added,
 750         providing support for LSI MegaRAID SAS controllers.  The
 751         &man.mfi.4; driver will attach to the controller, by default.
 752         To enable &man.mrsas.4; add
 753         <literal>hw.mfi.mrsas_enable=1</literal> to
 754         <filename>/boot/loader.conf</filename>, which turns off
 755         &man.mfi.4; device probing.</para>
 756
 757       <note>
 758         <para>At this time, the &man.mfiutil.8; utility and the &os;
 759           version of <application>MegaCLI</application> and
 760           <application>StorCli</application> do not work with
 761           &man.mrsas.4;.</para>
 762       </note>
 763
 764       <para revision="275461" contrib="sponsor" sponsor="&ix;">The
 765         &man.ctl.4; subsystem has been updated, increasing the ports
 766         limit from <literal>128</literal> to <literal>256</literal>,
 767         and <acronym>LUN</acronym> limit from <literal>256</literal>
 768         to <literal>1024</literal>.</para>
 769
 770       <para revision="276526">The <literal>asr(4)</literal> driver has
 771         been removed, and is no longer supported.</para>
 772
 773       <para revision="281387">The &man.hptnr.4; driver has been
 774         updated to version 1.1.1.</para>
 775     </sect2>
 776
 777     <sect2 xml:id="drivers-network">
 778       <title>Network Drivers</title>
 779
 780       <para revision="258830">Support for Broadcom chipsets BCM57764,
 781         BCM57767, BCM57782, BCM57786 and BCM57787 has been added to
 782         &man.bge.4;.</para>
 783
 784       <para revision="260448">Support for the &intel; Centrino&trade;
 785         Wireless-N 135 chipset has been added.</para>
 786
 787       <para revision="260552">Firmware for &intel; Centrino&trade;
 788         Wireless-N 105 devices has been added to the base
 789         system.</para>
 790
 791       <para revision="261975">The deprecated nve(4) driver has been
 792         removed.  Users of NVIDIA nForce MCP network adapters are
 793         advised to use the &man.nfe.4; driver instead, which has been
 794         the default driver for this hardware since
 795         &os;&nbsp;7.0.</para>
 796
 797       <para revision="264601" contrib="sponsor"
 798         sponsor="&darpa_afrl;">The <literal>if_nf10bmac(4)</literal>
 799         device has been added, providing support for NetFPGA-10G
 800         Embedded CPU Ethernet Core.</para>
 801
 802       <note>
 803         <para>The <literal>if_nf10bmac(4)</literal> driver operates on
 804           the FPGA, and is not suited for the PCI host
 805           interface.</para>
 806       </note>
 807
 808       <para revision="265348" contrib="sponsor"
 809         sponsor="&netgate;">The &man.ath.hal.4; driver has been
 810         updated to support the Atheros AR1111 chipset.</para>
 811
 812       <para revision="266770">Support for the &intel; Centrino&trade;
 813         Wireless-N 105 chipset has been added.</para>
 814
 815       <para revision="266757" contrib="sponsor"
 816         sponsor="&chelsio;">Support for the &man.cxgbe.4; Terminator
 817         5 (T5) 10G/40G cards has been added to &man.netmap.4;.</para>
 818
 819       <para revision="272730">The &man.alc.4; driver has been updated
 820         to support AR816x and AR817x ethernet controllers.</para>
 821
 822       <para revision="273331">The &man.vxlan.4; driver has been added,
 823         which creates a virtual Layer 2 (Ethernet) network overlaid in
 824         a Layer 3 (IP/UDP) network.  The &man.vxlan.4; driver is
 825         analogous to &man.vlan.4;, but is designed to be better suited
 826         for large, multiple-tenant datacenter environments.</para>
 827
 828       <para revision="274246" contrib="sponsor" sponsor="&yandex;">The
 829         &man.gre.4; driver has been significantly overhauled, and has
 830         been split into two separate modules, &man.gre.4; and
 831         &man.me.4;.</para>
 832     </sect2>
 833   </sect1>
 834
 835   <sect1 xml:id="hardware">
 836     <title>Hardware Support</title>
 837
 838     <para>This section covers general hardware support for physical
 839       machines, hypervisors, and virtualization environments, as well
 840       as hardware changes and updates that do not otherwise fit in
 841       other sections of this document.</para>
 842
 843     <sect2 xml:id="hardware-support">
 844       <title>Hardware Support</title>
 845
 846       <para revision="268303">The &man.asmc.4; driver has been
 847         updated to support the &apple;&nbsp;MacMini 3,1.</para>
 848
 849       <para revision="268351">Support for &os;/ia64 has been dropped
 850         as of &os;&nbsp;11.</para>
 851
 852       <para revision="274386">An issue that could cause a system to
 853         hang when entering <acronym>ACPI</acronym>
 854         <literal>S3</literal> state (suspend to
 855         <acronym>RAM</acronym>) has been corrected in the &man.acpi.4;
 856         and &man.pci.4; drivers.</para>
 857
 858       <para revision="274733" arch="powerpc">The power management unit
 859         subsystem has been updated to support power button events on
 860         certain &arch.powerpc; hardware, such as aluminum
 861         PowerBook&nbsp;&reg;.</para>
 862
 863       <para revision="275171,275190" arch="powerpc">The &man.hwpmc.4;
 864         driver has been updated to correct performance counter
 865         sampling on G4 (MPC74xxx) and G5 class processors.</para>
 866
 867       <para revision="281713" arch="powerpc">The &man.hwpmc.4;
 868         driver has been updated to support the Freescale e500
 869         core.</para>
 870
 871       <para revision="275732" contrib="sponsor"
 872         sponsor="&ff;,&netgate;">The
 873         <application>OpenCrypto</application> framework has been
 874         updated to include <literal>AES-ICM</literal> and
 875         <literal>AES-GCM</literal> modes, both of which have also been
 876         added to the &man.aesni.4; driver.</para>
 877     </sect2>
 878
 879     <sect2 xml:id="hardware-virtualization">
 880       <title>Virtualization Support</title>
 881
 882       <para revision="260410">Support for the <quote>Virtual Interrupt
 883           Delivery</quote> feature of &intel;&nbsp;VT-x is enabled if
 884         supported by the CPU.  This feature can be disabled by running
 885         <literal>sysctl hw.vmm.vmx.use_apic_vid=0</literal>.
 886         Additionally, to persist this setting across reboots, add
 887         <literal>hw.vmm.vmx.use_apic_vid=0</literal> to
 888         <filename>/etc/sysctl.conf</filename>.</para>
 889
 890       <para revision="260532">Support for <quote>Posted Interrupt
 891           Processing</quote> is enabled if supported by the CPU.  This
 892         feature can be disabled by running <literal>sysctl
 893           hw.vmm.vmx.use_apic_pir=0</literal>.  Additionally, to
 894         persist this setting across reboots, add
 895         <literal>hw.vmm.vmx.use_apic_pir=0</literal> to
 896         <filename>/etc/sysctl.conf</filename>.</para>
 897
 898       <para revision="260582">Unmapped IO support has been added to
 899         &man.virtio_blk.4;.</para>
 900
 901       <para revision="260583">Unmapped IO support has been added to
 902         &man.virtio_scsi.4;.</para>
 903
 904       <para revision="260847">The &man.virtio_random.4; driver has
 905         been added to harvest entropy from the host system.</para>
 906
 907       <para revision="261504">&os;/&arch.i386; guests can be run under
 908         bhyve.</para>
 909
 910       <para revision="267536" contrib="sponsor"
 911         sponsor="&citrix.rd;">Support for running a &os;/&arch.amd64;
 912         <application>Xen</application> guest instance as
 913         <acronym>PVH</acronym> guest has been added.
 914         <acronym>PVH</acronym> mode, short for <quote>Para-Virtualized
 915           Hardware</quote>, uses para-virtualized drivers for boot and
 916         I/O, and uses hardware virtualization extensions for all other
 917         tasks, without the need for emulation.</para>
 918
 919       <para revision="273515">The &man.virtio.console.4; driver has
 920         been added, which provides an interface to VirtIO console
 921         devices through a &man.tty.4; device.</para>
 922
 923       <para revision="279957">The &man.bhyve.8; hypervisor has been
 924         updated to support <literal>DSM TRIM</literal> commands for
 925         virtual <acronym>AHCI</acronym> disks.</para>
 926
 927       <para revision="281439" arch="arm">Support for the
 928         <application>QEMU</application> <literal>virt</literal> system
 929         has been added.</para>
 930
 931       <para revision="282212" contrib="sponsor" sponsor="&msostc;">The
 932         HyperV&trade; drivers have been updated with several
 933         enhancements:</para>
 934
 935       <itemizedlist>
 936         <listitem>
 937           <para>The &man.hv.vmbus.4; driver now has multi-channel
 938             support.</para>
 939         </listitem>
 940
 941         <listitem>
 942           <para>The &man.hv.storvsc.4; driver now has scatter/gather
 943             support, in addition to performance improvements.</para>
 944         </listitem>
 945
 946         <listitem>
 947           <para>The &man.hv.kvp.4; driver has received several bug
 948             fixes.</para>
 949         </listitem>
 950       </itemizedlist>
 951     </sect2>
 952
 953     <sect2 xml:id="hardware-arm">
 954       <title>ARM Support</title>
 955
 956       <para revision="260921">The &man.nand.4; device is enabled for
 957         ARM devices by default.</para>
 958
 959       <para revision="273264" arch="armv6">An issue that could cause
 960         instability when detecting <acronym>SD</acronym> cards on the
 961         Raspberry Pi <acronym>SOC</acronym> has been fixed.</para>
 962
 963       <para revision="275963">The <literal>bcm2835_cpufreq</literal>
 964         driver has been added, which supports <acronym>CPU</acronym>
 965         frequency and voltage control on the Raspberry Pi
 966         <acronym>SOC</acronym>.</para>
 967
 968       <para revision="280259" contrib="sponsor" sponsor="&ff;">Initial
 969         support for the ARM AArch64 architecture has been
 970         added.</para>
 971     </sect2>
 972   </sect1>
 973
 974   <sect1 xml:id="storage">
 975     <title>Storage</title>
 976
 977     <para>This section covers changes and additions to file systems
 978       and other storage subsystems, both local and networked.</para>
 979
 980     <sect2 xml:id="storage-general">
 981       <title>General Storage</title>
 982
 983       <para revision="278037" contrib="sponsor" sponsor="&ix;">The
 984         &man.ctl.4; <acronym>LUN</acronym> mapping has been rewritten,
 985         replacing <acronym>iSCSI</acronym>-specific mapping mechanisms
 986         with a new mechanism that works for any port.</para>
 987
 988       <para revision="278354" contrib="sponsor" sponsor="&ix;">The
 989         &man.ctld.8; utility has been updated to allow controlling
 990         non-<acronym>iSCSI</acronym> &man.ctl.4; ports.</para>
 991     </sect2>
 992
 993     <sect2 xml:id="storage-net">
 994       <title>Networked Storage</title>
 995
 996       <para revision="270096" contrib="sponsor" sponsor="&ff;">The new
 997         filesystem automount facility, &man.autofs.5;, has been added.
 998         The new &man.autofs.5; facility is similar to that found in
 999         other &unix;-like operating systems, such as OS&nbsp;X&trade;
1000         and Solaris&trade;.  The &man.autofs.5; facility uses
1001         a &sun;-compatible &man.auto.master.5; configuration file, and
1002         is administered with the &man.automount.8; userland utility,
1003         and the &man.automountd.8; and &man.autounmountd.8;
1004         daemons.</para>
1005     </sect2>
1006
1007     <sect2 xml:id="storage-zfs">
1008       <title>ZFS</title>
1009
1010       <para revision="275748">The <literal>arc_meta_limit</literal>
1011         statistics are now visible through the
1012         <literal>kstat</literal> &man.sysctl.8;.  As a result of this
1013         change, the <literal>vfs.zfs.arc_meta_used</literal>
1014         &man.sysctl.8; has been removed, and replaced with the
1015         <literal>kstat.zfs.misc.arcstats.arc_meta_used</literal>
1016         &man.sysctl.8;.</para>
1017     </sect2>
1018
1019     <sect2 xml:id="storage-geom">
1020       <title>&man.geom.4;</title>
1021
1022       <para revision="267359">Support for the
1023         <literal>disklabel64</literal> partitioning scheme has been
1024         added to &man.gpart.8;.</para>
1025     </sect2>
1026   </sect1>
1027
1028   <sect1 xml:id="boot">
1029     <title>Boot Loader Changes</title>
1030
1031     <para>This section covers the boot loader, boot menu, and other
1032       boot-related changes.</para>
1033
1034     <sect2 xml:id="boot-loader">
1035       <title>Boot Loader Changes</title>
1036
1037       <para revision="274085">The &man.vt.4; driver has been made the
1038         default system console driver.  The &man.syscons.4; driver is
1039         still available, and can be enabled by adding
1040         <literal>kern.vty=sc</literal> in &man.loader.conf.5;.
1041         Alternatively, &man.syscons.4; can be enabled at boot time by
1042         entering <literal>set kern.vty=sc</literal> at the
1043         &man.loader.8; prompt.</para>
1044
1045       <para revision="281616">The boot loader has been updated to
1046         support entering the <acronym>GELI</acronym> passphrase before
1047         loading the kernel.  To enable this behavior, add
1048         <literal>geom_eli_passphrase_prompt="YES"</literal> to
1049         &man.loader.conf.5;.</para>
1050     </sect2>
1051
1052     <sect2 xml:id="boot-menu">
1053       <title>Boot Menu Changes</title>
1054
1055       <para>&nbsp;</para>
1056     </sect2>
1057   </sect1>
1058
1059   <sect1 xml:id="network">
1060     <title>Networking</title>
1061
1062     <para>This section describes changes that affect networking in
1063       &os;.</para>
1064
1065     <sect2 xml:id="network-protocols">
1066       <title>Network Procols</title>
1067
1068       <para revision="263140">Support for the IPX network transport
1069         protocol has been removed, and will not be supported in
1070         &os;&nbsp;11 and later releases.</para>
1071
1072       <para revision="272720" contrib="sponsor"
1073         sponsor="&limelight;">Support for <acronym>PLPMTUD</acronym>
1074         blackhole detection (<acronym>RFC</acronym> 4821) has been
1075         added to the &man.tcp.4; stack, disabled by default.  New
1076         control tunables have been added:</para>
1077
1078       <informaltable frame="none" pgwide="0">
1079         <tgroup cols="2">
1080           <colspec colwidth="1*"/>
1081           <colspec colwidth="1*"/>
1082           <thead>
1083             <row>
1084               <entry>Tunable</entry>
1085               <entry>Description</entry>
1086             </row>
1087           </thead>
1088
1089           <tbody>
1090             <row>
1091               <entry><literal>net.inet.tcp.pmtud_blackhole_detection</literal></entry>
1092               <entry>Enables or disables <acronym>PLPMTUD</acronym>
1093                 blackhole detection</entry>
1094             </row>
1095
1096             <row>
1097               <entry><literal>net.inet.tcp.pmtud_blackhole_mss</literal></entry>
1098               <entry><acronym>MSS</acronym> to try for IPv4</entry>
1099             </row>
1100
1101             <row>
1102               <entry><literal>net.inet.tcp.v6pmtud_blackhole_mss</literal></entry>
1103               <entry><acronym>MSS to try for IPv6</acronym></entry>
1104             </row>
1105           </tbody>
1106         </tgroup>
1107       </informaltable>
1108
1109       <para>New monitoring &man.sysctl.8;s haven been added:</para>
1110
1111       <informaltable frame="none" pgwide="0">
1112         <tgroup cols="2">
1113           <colspec colwidth="1*"/>
1114           <colspec colwidth="1*"/>
1115           <thead>
1116             <row>
1117               <entry>Tunable</entry>
1118               <entry>Description</entry>
1119             </row>
1120           </thead>
1121
1122           <tbody>
1123             <row>
1124               <entry><literal>net.inet.tcp.pmtud_blackhole_activated</literal></entry>
1125               <entry>Number of times the code was activated to attempt
1126                 downshifting the <acronym>MSS</acronym></entry>
1127             </row>
1128
1129             <row>
1130               <entry><literal>net.inet.tcp.pmtud_blackhole_min_activated</literal></entry>
1131               <entry>Number of times the blackhole
1132                 <acronym>MSS</acronym> was used in an attempt to
1133                 downshift</entry>
1134             </row>
1135
1136             <row>
1137               <entry><literal>net.inet.tcp.pmtud_blackhole_failed</literal></entry>
1138               <entry>Number of times that the blackhole failed to
1139                 connect after downshifting the
1140                 <acronym>MSS</acronym></entry>
1141             </row>
1142           </tbody>
1143         </tgroup>
1144       </informaltable>
1145
1146       <para revision="280971" contrib="sponsor"
1147         sponsor="&netflix;, &nginx;">Support for <acronym>IP</acronym>
1148         identification for atomic datagrams (<acronym>RFC</acronym>
1149         6864) has been added.  Support for this feature can be toggled
1150         with the <literal>net.inet.ip.rfc6864</literal>
1151         &man.sysctl.8;, which is enabled by default.</para>
1152     </sect2>
1153   </sect1>
1154
1155   <sect1 xml:id="ports">
1156     <title>Ports Collection and Package Infrastructure</title>
1157
1158     <para>This section covers changes to the &os;&nbsp;Ports
1159       Collection, package infrastructure, and package maintenance and
1160       installation tools.</para>
1161
1162     <sect2 xml:id="ports-infrastructure">
1163       <title>Infrastructure Changes</title>
1164
1165       <para>&nbsp;</para>
1166     </sect2>
1167
1168     <sect2 xml:id="ports-packages ">
1169       <title>Packaging Changes</title>
1170
1171       <para>&nbsp;</para>
1172     </sect2>
1173   </sect1>
1174
1175   <sect1 xml:id="doc">
1176     <title>Documentation</title>
1177
1178     <para>This section covers changes to the &os;&nbsp;Documentation
1179       Project sources and toolchain.</para>
1180
1181     <sect2 xml:id="doc-sources">
1182       <title>Documentation Source Changes</title>
1183
1184       <para>&nbsp;</para>
1185     </sect2>
1186
1187     <sect2 xml:id="doc-toolchain">
1188       <title>Documentation Toolchain Changes</title>
1189
1190       <para>&nbsp;</para>
1191     </sect2>
1192   </sect1>
1193
1194   <sect1 xml:id="releng">
1195     <title>Release Engineering and Integration</title>
1196
1197     <para>This section convers changes that are specific to the
1198       &os;&nbsp;Release Engineering processes.</para>
1199
1200     <sect2 xml:id="releng-changes">
1201       <title>Integration Changes</title>
1202
1203       <para revision="277458" contrib="sponsor" sponsor="&ff;">The
1204         Release Engineering build tools have been updated to include
1205         support for producing virtual machine disk images for various
1206         cloud hosting providers.</para>
1207
1208       <para revision="278926">The Release Engineering build tools have
1209         been updated to use multi-threaded &man.xz.1;.  By default,
1210         the number of &man.xz.1; threads is set to the number of cores
1211         available.</para>
1212     </sect2>
1213   </sect1>
1214 </article>