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: 278934 -->
  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     </sect2>
 313
 314     <sect2 xml:id="userland-contrib">
 315       <title>Contributed Software</title>
 316
 317       <para revision="258884" contrib="sponsor"
 318         sponsor="&darpa_afrl;">&man.lldb.1; has been updated to
 319         upstream snapshot version r196259.</para>
 320
 321       <para revision="259626">Timezone data files have been updated to
 322         version 2013i.</para>
 323
 324       <para revision="260445">&man.byacc.1; has been updated to
 325         version 20140101.</para>
 326
 327       <para revision="261071">&man.jemalloc.3; has been updated to
 328         version 3.5.0.</para>
 329
 330       <para revision="261212"><application>bmake</application> has
 331         been updated to version 20140101.</para>
 332
 333       <para revision="261283"><application>libc++</application> has
 334         been updated to version 3.4.</para>
 335
 336       <para revision="261320"><application>OpenSSH</application> has
 337         been updated to 6.5p1.</para>
 338
 339       <para revision="261344"><application>mdocml</application> has
 340         been updated to version 1.12.3.</para>
 341
 342       <para revision="261991"><application>LLVM</application> and
 343         <application>Clang</application> have been updated to
 344         version 3.4.</para>
 345
 346       <para revision="266527"
 347         role="merged"><application>Sendmail</application> has been
 348         updated from 8.14.7 to 8.14.9.</para>
 349
 350       <para revision="276577"><application>file</application> has been
 351         updated to version 5.22.</para>
 352
 353       <para revision="275718">The <application>binutils</application>
 354         suite of utilities has been updated to include upstream
 355         patches that add new relocations for &arch.powerpc;
 356         support.</para>
 357
 358       <para revision="276398" contrib="sponsor" sponsor="&ff;">The
 359         <application>ELF Tool Chain</application> has been updated to
 360         upstream revision r3136.</para>
 361
 362       <para revision="276551">The <application>texinfo</application>
 363         utility and <literal>info</literal> pages were removed from
 364         the base system.  The <filename
 365           role="package">print/texinfo</filename> port should be
 366         installed on systems where <literal>info</literal> pages are
 367         needed.</para>
 368
 369       <para revision="276796" contrib="sponsor" sponsor="&ff;">The ELF
 370         object manipulation tools
 371         <application>addr2line</application>,
 372         <application>elfcopy (strip)</application>,
 373         <application>nm</application>,
 374         <application>size</application>, and
 375         <application>strings</application> were switched to the
 376         versions from the ELF Tool Chain project.</para>
 377
 378       <para revision="276881">The <literal>libedit</literal> library
 379         has been updated to include <acronym>UTF-8</acronym> support,
 380         adding <acronym>UTF-8</acronym> support to the &man.sh.1;
 381         shell.</para>
 382
 383       <para revision="277270"><application>OpenSSL</application> has
 384         been updated to version 1.0.1l.</para>
 385
 386       <para revision="278433">The &man.xz.1; utility has been udpated
 387         to version 5.2.0.</para>
 388
 389       <para revision="278433">The &man.xz.1; utility has been updated
 390         to support multi-threaded compression.</para>
 391
 392       <para revision="278970">The &man.acpi.4; subsystem has been
 393         updated to version 20150204.</para>
 394     </sect2>
 395
 396     <sect2 xml:id="userland-installer">
 397       <title>Installation and Configuration Tools</title>
 398
 399       <para revision="271539">The &man.bsdinstall.8; partition editor
 400         and &man.sade.8; utility have been updated to include native
 401         <acronym>ZFS</acronym> support.</para>
 402
 403       <para revision="272274">The &os; installation utility,
 404         &man.bsdinstall.8;, has been updated to set the
 405         <literal>canmount</literal> &man.zfs.8; property to
 406         <literal>off</literal> for the <filename
 407           class="directory">/var</filename> dataset, preventing the
 408         contents of directories within <filename
 409           class="directory">/var</filename> from conflicting when
 410         using multiple boot environments, such as that provided by
 411         <filename role="package">sysutils/beadm</filename>.</para>
 412
 413       <para revision="274394">The &man.bsdconfig.8; utility has been
 414         updated to skip the initial &man.tzsetup.8;
 415         <acronym>UTC</acronym> versus wall-clock time prompt when run
 416         in a virtual machine, determined when the
 417         <literal>kern.vm_guest</literal> &man.sysctl.8; is set to
 418         <literal>1</literal>.</para>
 419
 420       <para revision="275874">The &man.bsdinstall.8; utility has been
 421         updated to use the new &man.dpv.3; library to display progress
 422         when extracting the &os; distributions.</para>
 423     </sect2>
 424
 425     <sect2 xml:id="userland-rc">
 426       <title><filename class="directory">/etc/rc.d</filename>
 427         Scripts</title>
 428
 429       <para revision="270676">The &man.rc.8; subsystem has been
 430         updated to allow configuring services in <filename
 431           class="directory">&dollar;{LOCALBASE}/etc/rc.conf.d/</filename>.
 432         If <literal>LOCALBASE</literal> is unset, it defaults to
 433         <filename class="directory">/usr/local</filename>.</para>
 434
 435       <para revision="275299">The <filename>mrouted</filename>
 436         &man.rc.8; script has been removed from the base system.  An
 437         equivalent script is available from the <filename
 438           role="package">net/mrouted</filename> port.</para>
 439     </sect2>
 440
 441     <sect2 xml:id="userland-periodic">
 442       <title><filename class="directory">/etc/periodic</filename>
 443         Scripts</title>
 444
 445       <para revision="271321">The daily &man.periodic.8; script
 446         <filename>110.clean-tmps</filename> has been updated to avoid
 447         crossing filesystem mount boundaries when cleaning files in
 448         <filename class="directory">/tmp</filename>.</para>
 449     </sect2>
 450
 451     <sect2 xml:id="userland-libraries">
 452       <title>Runtime Libraries and API</title>
 453
 454       <para revision="268461">The &man.readline.3; library is now
 455         statically linked in software within the base system, and the
 456         shared library is no longer installed, allowing the Ports
 457         Collection to use a modern version of the library.</para>
 458
 459       <para revision="272273">The &man.strptime.3; library has been
 460         updated to add support for <acronym>POSIX</acronym>-2001
 461         features <literal>%U</literal> and
 462         <literal>%W</literal>.</para>
 463
 464       <para revision="272842,272848" contrib="sponsor"
 465         sponsor="&ff;">The &man.dl.iterate.phdr.3; library has been
 466         changed to always return the path name of the
 467         <acronym>ELF</acronym> object in the
 468         <literal>dlpi_name</literal> structure member.</para>
 469
 470       <para revision="273806" contrib="sponsor" sponsor="&chelsio;">A
 471         userland library for Chelsio Terminator 5 based iWARP cards
 472         has been added, allowing userland <acronym>RDMA</acronym>
 473         applications to work over compatible
 474         <acronym>NIC</acronym>s.</para>
 475
 476       <para revision="274987">The &man.gpio.3; library has been added,
 477         providing a wrapper around the &man.gpio.4; kernel
 478         interface.</para>
 479
 480       <para revision="277610">The <literal>futimens()</literal> and
 481         <literal>utimensat()</literal> system calls have been
 482         added.  See &man.utimensat.2; for more information.</para>
 483
 484       <para revision="278934">The &man.elf.3; compile-time dependency
 485         has been removed from <filename>dtri.o</filename>, which
 486         allows adding <application>DTrace</application> probes to
 487         userland applications and libraries without also linking
 488         against &man.elf.3;.</para>
 489
 490       <para revision="279186">The &man.setmode.3; function has been
 491         updated to consistently set <literal>errno</literal> on
 492         failure.</para>
 493     </sect2>
 494
 495     <sect2 xml:id="userland-abi">
 496       <title>ABI Compatibility</title>
 497
 498       <para revision="271982">The &linux; compatibility version has
 499         been updated to <literal>2.6.18</literal>.  The
 500         <literal>compat.linux.osrelease</literal> &man.sysctl.8; is
 501         evaluated when building the <filename
 502           role="package">emulators/linux-c6</filename> and related
 503         ports.</para>
 504     </sect2>
 505   </sect1>
 506
 507   <sect1 xml:id="kernel">
 508     <title>Kernel</title>
 509
 510     <para>This section covers changes to kernel configurations, system
 511       tuning, and system control parameters that are not otherwise
 512       categorized.</para>
 513
 514     <sect2 xml:id="kernel-bugfix">
 515       <title>Kernel Bug Fixes</title>
 516
 517       <para revision="265876">A kernel bug that inhibited proper
 518         functionality of the <literal>dev.cpu.0.freq</literal>
 519         &man.sysctl.8; on &intel; processors with Turbo
 520         Boost&nbsp;&trade; enabled has been fixed.</para>
 521
 522       <para revision="271697" arch="powerpc">Support for
 523         &man.dtrace.1; stack tracing has been fixed for
 524         &os;/&arch.powerpc;, using the <literal>trapexit()</literal>
 525         and <literal>asttrapexit()</literal> functions instead of
 526         checking within addressed kernel space.</para>
 527
 528       <para revision="272089">A bug in &man.ipfw.4; that could
 529         potentially lead to a kernel panic when using &man.dummynet.4;
 530         at layer 2 has been fixed.</para>
 531     </sect2>
 532
 533     <sect2 xml:id="kernel-config">
 534       <title>Kernel Configuration</title>
 535
 536       <para revision="266531">The <literal>IMAGACT_BINMISC</literal>
 537         kernel configuration option has been enabled by default,
 538         which enables application execution through emulators, such
 539         as <application>Qemu</application>.</para>
 540
 541       <para revision="268045">The <literal>VT</literal> kernel
 542         configuration file has been removed, and the &man.vt.4;
 543         driver is included in the <literal>GENERIC</literal> kernel.
 544         To enable &man.vt.4;, enter <literal>set kern.vty=vt</literal>
 545         at the &man.loader.8; prompt during boot, or add
 546         <literal>kern.vty=vt</literal> to &man.loader.conf.5; and
 547         reboot the system.</para>
 548
 549       <para revision="277904">The &man.config.8; utility has been
 550         updated to allow using a non-standard <filename
 551           class="directory">src/</filename> tree, specified as an
 552         argument to the <literal>-s</literal> flag.</para>
 553
 554       <para revision="277990" arch="powerpc64">The
 555         &os;/&arch.powerpc64; kernel now builds as
 556         a position-independent executable, allowing the kernel to be
 557         loaded into and run from any physical or virtual
 558         address.</para>
 559
 560       <important>
 561         <para>This change requires an update to &man.loader.8;.
 562           The userland and kernel must be updated before rebooting the
 563           system.</para>
 564       </important>
 565
 566       <para revision="279189" contrib="sponsor" sponsor="&ff;"
 567         arch="powerpc">Kernel support for Vector-Scalar eXtension
 568         (<acronym>VSX</acronym>) found on POWER7 and POWER8 hardware
 569         has been added.</para>
 570
 571       <para revision="279252" contrib="sponsor" sponsor="&ff;"
 572         arch="powerpc">The &man.pmap.9; implementation for 64-bit
 573         &powerpc; processors has been overhaulded to improve
 574         concurrency.</para>
 575     </sect2>
 576
 577     <sect2 xml:id="kernel-sysctl">
 578       <title>System Tuning and Controls</title>
 579
 580       <para revision="275140" contrib="sponsor" sponsor="&ff;">The
 581         &man.hwpmc.4; default and maximum callchain depths have been
 582         increased.  The default has been increased from 16 to 32, and
 583         the maximum increased from 32 to 128.</para>
 584     </sect2>
 585   </sect1>
 586
 587   <sect1 xml:id="drivers">
 588     <title>Devices and Drivers</title>
 589
 590     <para>This section covers changes and additions to devices and
 591       device drivers since &release.prev;.</para>
 592
 593     <sect2 xml:id="drivers-device">
 594       <title>Device Drivers</title>
 595
 596       <para revision="260903">Support for GPS ports has been added to
 597         &man.uhso.4;.</para>
 598
 599       <para revision="265132">The &man.full.4; device has been added,
 600         and the <literal>lindev(4)</literal> device has been removed.
 601         Prior to this change, <literal>lindev(4)</literal> provided
 602         only the <filename>/dev/full</filename> character device,
 603         returning <literal>ENOSPC</literal> on write attempts.  As
 604         this device is not specific to &linux;, a native &os; version
 605         has been added.</para>
 606
 607       <para revision="271705">Hardware context support has been
 608         added to the <literal>drm/i915</literal> driver, adding
 609         support for <application>Mesa</application> 9.2 and
 610         later.</para>
 611
 612       <para revision="273178">The &man.vt.4; driver has been updated,
 613         replacing the bitmapped <literal>kern.vt.spclkeys</literal>
 614         &man.sysctl.8; with individual
 615         <literal>kern.vt.kbd_*</literal> variants.</para>
 616
 617       <para revision="273598">The &man.hpet.4; driver has been updated
 618         to create a
 619         <filename>/dev/hpet<replaceable>N</replaceable></filename>
 620         device, providing access to <acronym>HPET</acronym> from
 621         userspace.</para>
 622     </sect2>
 623
 624     <sect2 xml:id="drivers-storage">
 625       <title>Storage Drivers</title>
 626
 627       <para revision="265236" contrib="sponsor"
 628         sponsor="&lsi;, &spectralogic;" sponsorurl="">The &man.mpr.4;
 629         device has been added, providing support for LSI Fusion-MPT
 630         3 12Gb SCSI/SATA controllers.</para>
 631
 632       <para revision="265555" contrib="sponsor"
 633           sponsor="&lsi;">The &man.mrsas.4; driver has been added,
 634         providing support for LSI MegaRAID SAS controllers.  The
 635         &man.mfi.4; driver will attach to the controller, by default.
 636         To enable &man.mrsas.4; add
 637         <literal>hw.mfi.mrsas_enable=1</literal> to
 638         <filename>/boot/loader.conf</filename>, which turns off
 639         &man.mfi.4; device probing.</para>
 640
 641       <note>
 642         <para>At this time, the &man.mfiutil.8; utility and the &os;
 643           version of <application>MegaCLI</application> and
 644           <application>StorCli</application> do not work with
 645           &man.mrsas.4;.</para>
 646       </note>
 647
 648       <para revision="275461" contrib="sponsor" sponsor="&ix;">The
 649         &man.ctl.4; subsystem has been updated, increasing the ports
 650         limit from <literal>128</literal> to <literal>256</literal>,
 651         and <acronym>LUN</acronym> limit from <literal>256</literal>
 652         to <literal>1024</literal>.</para>
 653
 654       <para revision="276526">The <literal>asr(4)</literal> driver has
 655         been removed, and is no longer supported.</para>
 656     </sect2>
 657
 658     <sect2 xml:id="drivers-network">
 659       <title>Network Drivers</title>
 660
 661       <para revision="258830">Support for Broadcom chipsets BCM57764,
 662         BCM57767, BCM57782, BCM57786 and BCM57787 has been added to
 663         &man.bge.4;.</para>
 664
 665       <para revision="260448">Support for the &intel; Centrino&trade;
 666         Wireless-N 135 chipset has been added.</para>
 667
 668       <para revision="260552">Firmware for &intel; Centrino&trade;
 669         Wireless-N 105 devices has been added to the base
 670         system.</para>
 671
 672       <para revision="261975">The deprecated nve(4) driver has been
 673         removed.  Users of NVIDIA nForce MCP network adapters are
 674         advised to use the &man.nfe.4; driver instead, which has been
 675         the default driver for this hardware since
 676         &os;&nbsp;7.0.</para>
 677
 678       <para revision="264601" contrib="sponsor"
 679         sponsor="&darpa_afrl;">The <literal>if_nf10bmac(4)</literal>
 680         device has been added, providing support for NetFPGA-10G
 681         Embedded CPU Ethernet Core.</para>
 682
 683       <note>
 684         <para>The <literal>if_nf10bmac(4)</literal> driver operates on
 685           the FPGA, and is not suited for the PCI host
 686           interface.</para>
 687       </note>
 688
 689       <para revision="265348" contrib="sponsor"
 690         sponsor="&netgate;">The &man.ath.hal.4; driver has been
 691         updated to support the Atheros AR1111 chipset.</para>
 692
 693       <para revision="266770">Support for the &intel; Centrino&trade;
 694         Wireless-N 105 chipset has been added.</para>
 695
 696       <para revision="266757" contrib="sponsor"
 697         sponsor="&chelsio;">Support for the &man.cxgbe.4; Terminator
 698         5 (T5) 10G/40G cards has been added to &man.netmap.4;.</para>
 699
 700       <para revision="272730">The &man.alc.4; driver has been updated
 701         to support AR816x and AR817x ethernet controllers.</para>
 702
 703       <para revision="273331">The &man.vxlan.4; driver has been added,
 704         which creates a virtual Layer 2 (Ethernet) network overlaid in
 705         a Layer 3 (IP/UDP) network.  The &man.vxlan.4; driver is
 706         analogous to &man.vlan.4;, but is designed to be better suited
 707         for large, multiple-tenant datacenter environments.</para>
 708
 709       <para revision="274246" contrib="sponsor" sponsor="&yandex;">The
 710         &man.gre.4; driver has been significantly overhauled, and has
 711         been split into two separate modules, &man.gre.4; and
 712         &man.me.4;.</para>
 713     </sect2>
 714   </sect1>
 715
 716   <sect1 xml:id="hardware">
 717     <title>Hardware Support</title>
 718
 719     <para>This section covers general hardware support for physical
 720       machines, hypervisors, and virtualization environments, as well
 721       as hardware changes and updates that do not otherwise fit in
 722       other sections of this document.</para>
 723
 724     <sect2 xml:id="hardware-support">
 725       <title>Hardware Support</title>
 726
 727       <para revision="268303">The &man.asmc.4; driver has been
 728         updated to support the &apple;&nbsp;MacMini 3,1.</para>
 729
 730       <para revision="268351">Support for &os;/ia64 has been dropped
 731         as of &os;&nbsp;11.</para>
 732
 733       <para revision="274386">An issue that could cause a system to
 734         hang when entering <acronym>ACPI</acronym>
 735         <literal>S3</literal> state (suspend to
 736         <acronym>RAM</acronym>) has been corrected in the &man.acpi.4;
 737         and &man.pci.4; drivers.</para>
 738
 739       <para revision="274733" arch="powerpc">The power management unit
 740         subsystem has been updated to support power button events on
 741         certain &arch.powerpc; hardware, such as aluminum
 742         PowerBook&nbsp;&reg;.</para>
 743
 744       <para revision="275171,275190" arch="powerpc">The &man.hwpmc.4;
 745         driver has been updated to correct performance counter
 746         sampling on G4 (MPC74xxx) and G5 class processors.</para>
 747
 748       <para revision="275732" contrib="sponsor"
 749         sponsor="&ff;,&netgate;">The
 750         <application>OpenCrypto</application> framework has been
 751         updated to include <literal>AES-ICM</literal> and
 752         <literal>AES-GCM</literal> modes, both of which have also been
 753         added to the &man.aesni.4; driver.</para>
 754     </sect2>
 755
 756     <sect2 xml:id="hardware-virtualization">
 757       <title>Virtualization Support</title>
 758
 759       <para revision="260410">Support for the <quote>Virtual Interrupt
 760           Delivery</quote> feature of &intel;&nbsp;VT-x is enabled if
 761         supported by the CPU.  This feature can be disabled by running
 762         <literal>sysctl hw.vmm.vmx.use_apic_vid=0</literal>.
 763         Additionally, to persist this setting across reboots, add
 764         <literal>hw.vmm.vmx.use_apic_vid=0</literal> to
 765         <filename>/etc/sysctl.conf</filename>.</para>
 766
 767       <para revision="260532">Support for <quote>Posted Interrupt
 768           Processing</quote> is enabled if supported by the CPU.  This
 769         feature can be disabled by running <literal>sysctl
 770           hw.vmm.vmx.use_apic_pir=0</literal>.  Additionally, to
 771         persist this setting across reboots, add
 772         <literal>hw.vmm.vmx.use_apic_pir=0</literal> to
 773         <filename>/etc/sysctl.conf</filename>.</para>
 774
 775       <para revision="260582">Unmapped IO support has been added to
 776         &man.virtio_blk.4;.</para>
 777
 778       <para revision="260583">Unmapped IO support has been added to
 779         &man.virtio_scsi.4;.</para>
 780
 781       <para revision="260847">The &man.virtio_random.4; driver has
 782         been added to harvest entropy from the host system.</para>
 783
 784       <para revision="261504">&os;/&arch.i386; guests can be run under
 785         bhyve.</para>
 786
 787       <para revision="267536" contrib="sponsor"
 788         sponsor="&citrix.rd;">Support for running a &os;/&arch.amd64;
 789         <application>Xen</application> guest instance as
 790         <acronym>PVH</acronym> guest has been added.
 791         <acronym>PVH</acronym> mode, short for <quote>Para-Virtualized
 792           Hardware</quote>, uses para-virtualized drivers for boot and
 793         I/O, and uses hardware virtualization extensions for all other
 794         tasks, without the need for emulation.</para>
 795
 796       <para revision="273515">The &man.virtio.console.4; driver has
 797         been added, which provides an interface to VirtIO console
 798         devices through a &man.tty.4; device.</para>
 799     </sect2>
 800
 801     <sect2 xml:id="hardware-arm">
 802       <title>ARM Support</title>
 803
 804       <para revision="260921">The &man.nand.4; device is enabled for
 805         ARM devices by default.</para>
 806
 807       <para revision="273264" arch="armv6">An issue that could cause
 808         instability when detecting <acronym>SD</acronym> cards on the
 809         Raspberry Pi <acronym>SOC</acronym> has been fixed.</para>
 810
 811       <para revision="275963">The <literal>bcm2835_cpufreq</literal>
 812         driver has been added, which supports <acronym>CPU</acronym>
 813         frequency and voltage control on the Raspberry Pi
 814         <acronym>SOC</acronym>.</para>
 815     </sect2>
 816   </sect1>
 817
 818   <sect1 xml:id="storage">
 819     <title>Storage</title>
 820
 821     <para>This section covers changes and additions to file systems
 822       and other storage subsystems, both local and networked.</para>
 823
 824     <sect2 xml:id="storage-general">
 825       <title>General Storage</title>
 826       <para revision="278037" contrib="sponsor" sponsor="&ix;">The
 827         &man.ctl.4; <acronym>LUN</acronym> mapping has been rewritten,
 828         replacing <acronym>iSCSI</acronym>-specific mapping mechanisms
 829         with a new mechanism that works for any port.</para>
 830
 831       <para revision="278354" contrib="sponsor" sponsor="&ix;">The
 832         &man.ctld.8; utility has been updated to allow controlling
 833         non-<acronym>iSCSI</acronym> &man.ctl.4; ports.</para>
 834     </sect2>
 835
 836     <sect2 xml:id="storage-net">
 837       <title>Networked Storage</title>
 838
 839       <para revision="270096" contrib="sponsor" sponsor="&ff;">The new
 840         filesystem automount facility, &man.autofs.5;, has been added.
 841         The new &man.autofs.5; facility is similar to that found in
 842         other &unix;-like operating systems, such as OS&nbsp;X&trade;
 843         and Solaris&trade;.  The &man.autofs.5; facility uses
 844         a &sun;-compatible &man.auto.master.5; configuration file, and
 845         is administered with the &man.automount.8; userland utility,
 846         and the &man.automountd.8; and &man.autounmountd.8;
 847         daemons.</para>
 848     </sect2>
 849
 850     <sect2 xml:id="storage-zfs">
 851       <title>ZFS</title>
 852
 853       <para revision="275748">The <literal>arc_meta_limit</literal>
 854         statistics are now visible through the
 855         <literal>kstat</literal> &man.sysctl.8;.  As a result of this
 856         change, the <literal>vfs.zfs.arc_meta_used</literal>
 857         &man.sysctl.8; has been removed, and replaced with the
 858         <literal>kstat.zfs.misc.arcstats.arc_meta_used</literal>
 859         &man.sysctl.8;.</para>
 860     </sect2>
 861
 862     <sect2 xml:id="storage-geom">
 863       <title>&man.geom.4;</title>
 864
 865       <para revision="267359">Support for the
 866         <literal>disklabel64</literal> partitioning scheme has been
 867         added to &man.gpart.8;.</para>
 868     </sect2>
 869   </sect1>
 870
 871   <sect1 xml:id="boot">
 872     <title>Boot Loader Changes</title>
 873
 874     <para>This section covers the boot loader, boot menu, and other
 875       boot-related changes.</para>
 876
 877     <sect2 xml:id="boot-loader">
 878       <title>Boot Loader Changes</title>
 879
 880       <para revision="274085">The &man.vt.4; driver has been made the
 881         default system console driver.  The &man.syscons.4; driver is
 882         still available, and can be enabled by adding
 883         <literal>kern.vty=sc</literal> in &man.loader.conf.5;.
 884         Alternatively, &man.syscons.4; can be enabled at boot time by
 885         entering <literal>set kern.vty=sc</literal> at the
 886         &man.loader.8; prompt.</para>
 887     </sect2>
 888
 889     <sect2 xml:id="boot-menu">
 890       <title>Boot Menu Changes</title>
 891
 892       <para>&nbsp;</para>
 893     </sect2>
 894   </sect1>
 895
 896   <sect1 xml:id="network">
 897     <title>Networking</title>
 898
 899     <para>This section describes changes that affect networking in
 900       &os;.</para>
 901
 902     <sect2 xml:id="network-protocols">
 903       <title>Network Procols</title>
 904
 905       <para revision="263140">Support for the IPX network transport
 906         protocol has been removed, and will not be supported in
 907         &os;&nbsp;11 and later releases.</para>
 908
 909       <para revision="272720" contrib="sponsor"
 910         sponsor="&limelight;">Support for <acronym>PLPMTUD</acronym>
 911         blackhole detection (<acronym>RFC</acronym> 4821) has been
 912         added to the &man.tcp.4; stack, disabled by default.  New
 913         control tunables have been added:</para>
 914
 915       <informaltable frame="none" pgwide="0">
 916         <tgroup cols="2">
 917           <colspec colwidth="1*"/>
 918           <colspec colwidth="1*"/>
 919           <thead>
 920             <row>
 921               <entry>Tunable</entry>
 922               <entry>Description</entry>
 923             </row>
 924           </thead>
 925
 926           <tbody>
 927             <row>
 928               <entry><literal>net.inet.tcp.pmtud_blackhole_detection</literal></entry>
 929               <entry>Enables or disables <acronym>PLPMTUD</acronym>
 930                 blackhole detection</entry>
 931             </row>
 932
 933             <row>
 934               <entry><literal>net.inet.tcp.pmtud_blackhole_mss</literal></entry>
 935               <entry><acronym>MSS</acronym> to try for IPv4</entry>
 936             </row>
 937
 938             <row>
 939               <entry><literal>net.inet.tcp.v6pmtud_blackhole_mss</literal></entry>
 940               <entry><acronym>MSS to try for IPv6</acronym></entry>
 941             </row>
 942           </tbody>
 943         </tgroup>
 944       </informaltable>
 945
 946       <para>New monitoring &man.sysctl.8;s haven been added:</para>
 947
 948       <informaltable frame="none" pgwide="0">
 949         <tgroup cols="2">
 950           <colspec colwidth="1*"/>
 951           <colspec colwidth="1*"/>
 952           <thead>
 953             <row>
 954               <entry>Tunable</entry>
 955               <entry>Description</entry>
 956             </row>
 957           </thead>
 958
 959           <tbody>
 960             <row>
 961               <entry><literal>net.inet.tcp.pmtud_blackhole_activated</literal></entry>
 962               <entry>Number of times the code was activated to attempt
 963                 downshifting the <acronym>MSS</acronym></entry>
 964             </row>
 965
 966             <row>
 967               <entry><literal>net.inet.tcp.pmtud_blackhole_min_activated</literal></entry>
 968               <entry>Number of times the blackhole
 969                 <acronym>MSS</acronym> was used in an attempt to
 970                 downshift</entry>
 971             </row>
 972
 973             <row>
 974               <entry><literal>net.inet.tcp.pmtud_blackhole_failed</literal></entry>
 975               <entry>Number of times that the blackhole failed to
 976                 connect after downshifting the
 977                 <acronym>MSS</acronym></entry>
 978             </row>
 979           </tbody>
 980         </tgroup>
 981       </informaltable>
 982     </sect2>
 983   </sect1>
 984
 985   <sect1 xml:id="ports">
 986     <title>Ports Collection and Package Infrastructure</title>
 987
 988     <para>This section covers changes to the &os;&nbsp;Ports
 989       Collection, package infrastructure, and package maintenance and
 990       installation tools.</para>
 991
 992     <sect2 xml:id="ports-infrastructure">
 993       <title>Infrastructure Changes</title>
 994
 995       <para>&nbsp;</para>
 996     </sect2>
 997
 998     <sect2 xml:id="ports-packages ">
 999       <title>Packaging Changes</title>
1000
1001       <para>&nbsp;</para>
1002     </sect2>
1003   </sect1>
1004
1005   <sect1 xml:id="doc">
1006     <title>Documentation</title>
1007
1008     <para>This section covers changes to the &os;&nbsp;Documentation
1009       Project sources and toolchain.</para>
1010
1011     <sect2 xml:id="doc-sources">
1012       <title>Documentation Source Changes</title>
1013
1014       <para>&nbsp;</para>
1015     </sect2>
1016
1017     <sect2 xml:id="doc-toolchain">
1018       <title>Documentation Toolchain Changes</title>
1019
1020       <para>&nbsp;</para>
1021     </sect2>
1022   </sect1>
1023
1024   <sect1 xml:id="releng">
1025     <title>Release Engineering and Integration</title>
1026
1027     <para>This section convers changes that are specific to the
1028       &os;&nbsp;Release Engineering processes.</para>
1029
1030     <sect2 xml:id="releng-changes">
1031       <title>Integration Changes</title>
1032
1033       <para revision="277458" contrib="sponsor" sponsor="&ff;">The
1034         Release Engineering build tools have been updated to include
1035         support for producing virtual machine disk images for various
1036         cloud hosting providers.</para>
1037
1038       <para revision="278926">The Release Engineering build tools have
1039         been updated to use multi-threaded &man.xz.1;.  By default,
1040         the number of &man.xz.1; threads is set to the number of cores
1041         available.</para>
1042     </sect2>
1043   </sect1>
1044 </article>