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

   1 <?xml version="1.0" encoding="iso-8859-1"?>
   2 <!DOCTYPE article PUBLIC "-//FreeBSD//DTD DocBook XML V5.0-Based Extension//EN"
   3         "../../../share/xml/freebsd50.dtd" [
   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: 277458 -->
  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     </sect2>
 306
 307     <sect2 xml:id="userland-contrib">
 308       <title>Contributed Software</title>
 309
 310       <para revision="258884" contrib="sponsor"
 311         sponsor="&darpa_afrl;">&man.lldb.1; has been updated to
 312         upstream snapshot version r196259.</para>
 313
 314       <para revision="259626">Timezone data files have been updated to
 315         version 2013i.</para>
 316
 317       <para revision="260445">&man.byacc.1; has been updated to
 318         version 20140101.</para>
 319
 320       <para revision="261071">&man.jemalloc.3; has been updated to
 321         version 3.5.0.</para>
 322
 323       <para revision="261212"><application>bmake</application> has
 324         been updated to version 20140101.</para>
 325
 326       <para revision="261283"><application>libc++</application> has
 327         been updated to version 3.4.</para>
 328
 329       <para revision="261320"><application>OpenSSH</application> has
 330         been updated to 6.5p1.</para>
 331
 332       <para revision="261344"><application>mdocml</application> has
 333         been updated to version 1.12.3.</para>
 334
 335       <para revision="261991"><application>LLVM</application> and
 336         <application>Clang</application> have been updated to
 337         version 3.4.</para>
 338
 339       <para revision="266527"
 340         role="merged"><application>Sendmail</application> has been
 341         updated from 8.14.7 to 8.14.9.</para>
 342
 343       <para revision="276577"><application>file</application> has been
 344         updated to version 5.22.</para>
 345
 346       <para revision="275718">The <application>binutils</application>
 347         suite of utilities has been updated to include upstream
 348         patches that add new relocations for &arch.powerpc;
 349         support.</para>
 350
 351       <para revision="276398" contrib="sponsor" sponsor="&ff;">The
 352         <application>ELF Tool Chain</application> has been updated to
 353         upstream revision r3136.</para>
 354
 355       <para revision="276551">The <application>texinfo</application>
 356         utility and <literal>info</literal> pages were removed from
 357         the base system.  The <filename
 358           role="package">print/texinfo</filename> port should be
 359         installed on systems where <literal>info</literal> pages are
 360         needed.</para>
 361
 362       <para revision="276796" contrib="sponsor" sponsor="&ff;">The ELF
 363         object manipulation tools
 364         <application>addr2line</application>,
 365         <application>elfcopy (strip)</application>,
 366         <application>nm</application>,
 367         <application>size</application>, and
 368         <application>strings</application> were switched to the
 369         versions from the ELF Tool Chain project.</para>
 370
 371       <para revision="276881">The <literal>libedit</literal> library
 372         has been updated to include <acronym>UTF-8</acronym> support,
 373         adding <acronym>UTF-8</acronym> support to the &man.sh.1;
 374         shell.</para>
 375
 376       <para revision="277270"><application>OpenSSL</application> has
 377         been updated to version 1.0.1l.</para>
 378     </sect2>
 379
 380     <sect2 xml:id="userland-installer">
 381       <title>Installation and Configuration Tools</title>
 382
 383       <para revision="271539">The &man.bsdinstall.8; partition editor
 384         and &man.sade.8; utility have been updated to include native
 385         <acronym>ZFS</acronym> support.</para>
 386
 387       <para revision="272274">The &os; installation utility,
 388         &man.bsdinstall.8;, has been updated to set the
 389         <literal>canmount</literal> &man.zfs.8; property to
 390         <literal>off</literal> for the <filename
 391           class="directory">/var</filename> dataset, preventing the
 392         contents of directories within <filename
 393           class="directory">/var</filename> from conflicting when
 394         using multiple boot environments, such as that provided by
 395         <filename role="package">sysutils/beadm</filename>.</para>
 396
 397       <para revision="274394">The &man.bsdconfig.8; utility has been
 398         updated to skip the initial &man.tzsetup.8;
 399         <acronym>UTC</acronym> versus wall-clock time prompt when run
 400         in a virtual machine, determined when the
 401         <literal>kern.vm_guest</literal> &man.sysctl.8; is set to
 402         <literal>1</literal>.</para>
 403
 404       <para revision="275874">The &man.bsdinstall.8; utility has been
 405         updated to use the new &man.dpv.3; library to display progress
 406         when extracting the &os; distributions.</para>
 407     </sect2>
 408
 409     <sect2 xml:id="userland-rc">
 410       <title><filename class="directory">/etc/rc.d</filename>
 411         Scripts</title>
 412
 413       <para revision="270676">The &man.rc.8; subsystem has been
 414         updated to allow configuring services in <filename
 415           class="directory">&dollar;{LOCALBASE}/etc/rc.conf.d/</filename>.
 416         If <literal>LOCALBASE</literal> is unset, it defaults to
 417         <filename class="directory">/usr/local</filename>.</para>
 418
 419       <para revision="275299">The <filename>mrouted</filename>
 420         &man.rc.8; script has been removed from the base system.  An
 421         equivalent script is available from the <filename
 422           role="package">net/mrouted</filename> port.</para>
 423     </sect2>
 424
 425     <sect2 xml:id="userland-periodic">
 426       <title><filename class="directory">/etc/periodic</filename>
 427         Scripts</title>
 428
 429       <para revision="271321">The daily &man.periodic.8; script
 430         <filename>110.clean-tmps</filename> has been updated to avoid
 431         crossing filesystem mount boundaries when cleaning files in
 432         <filename class="directory">/tmp</filename>.</para>
 433     </sect2>
 434
 435     <sect2 xml:id="userland-libraries">
 436       <title>Runtime Libraries and API</title>
 437
 438       <para revision="268461">The &man.readline.3; library is now
 439         statically linked in software within the base system, and the
 440         shared library is no longer installed, allowing the Ports
 441         Collection to use a modern version of the library.</para>
 442
 443       <para revision="272273">The &man.strptime.3; library has been
 444         updated to add support for <acronym>POSIX</acronym>-2001
 445         features <literal>%U</literal> and
 446         <literal>%W</literal>.</para>
 447
 448       <para revision="272842,272848" contrib="sponsor"
 449         sponsor="&ff;">The &man.dl.iterate.phdr.3; library has been
 450         changed to always return the path name of the
 451         <acronym>ELF</acronym> object in the
 452         <literal>dlpi_name</literal> structure member.</para>
 453
 454       <para revision="273806" contrib="sponsor" sponsor="&chelsio;">A
 455         userland library for Chelsio Terminator 5 based iWARP cards
 456         has been added, allowing userland <acronym>RDMA</acronym>
 457         applications to work over compatible
 458         <acronym>NIC</acronym>s.</para>
 459
 460       <para revision="274987">The &man.gpio.3; library has been added,
 461         providing a wrapper around the &man.gpio.4; kernel
 462         interface.</para>
 463
 464       <para revision="277610">The <literal>futimens()</literal> and
 465         <literal>utimensat()</literal> system calls have been
 466         added.  See &man.utimensat.2; for more information.</para>
 467
 468       <para revision="278934">The &man.elf.3; compile-time dependency
 469         has been removed from <filename>dtri.o</filename>, which
 470         allows adding <application>DTrace</application> to userland
 471         applications and libraries without also linking against
 472         &man.elf.3;.</para>
 473     </sect2>
 474
 475     <sect2 xml:id="userland-abi">
 476       <title>ABI Compatibility</title>
 477
 478       <para revision="271982">The &linux; compatibility version has
 479         been updated to <literal>2.6.18</literal>.  The
 480         <literal>compat.linux.osrelease</literal> &man.sysctl.8; is
 481         evaluated when building the <filename
 482           role="package">emulators/linux-c6</filename> and related
 483         ports.</para>
 484     </sect2>
 485   </sect1>
 486
 487   <sect1 xml:id="kernel">
 488     <title>Kernel</title>
 489
 490     <para>This section covers changes to kernel configurations, system
 491       tuning, and system control parameters that are not otherwise
 492       categorized.</para>
 493
 494     <sect2 xml:id="kernel-bugfix">
 495       <title>Kernel Bug Fixes</title>
 496
 497       <para revision="265876">A kernel bug that inhibited proper
 498         functionality of the <literal>dev.cpu.0.freq</literal>
 499         &man.sysctl.8; on &intel; processors with Turbo
 500         Boost&nbsp;&trade; enabled has been fixed.</para>
 501
 502       <para revision="271697" arch="powerpc">Support for
 503         &man.dtrace.1; stack tracing has been fixed for
 504         &os;/&arch.powerpc;, using the <literal>trapexit()</literal>
 505         and <literal>asttrapexit()</literal> functions instead of
 506         checking within addressed kernel space.</para>
 507
 508       <para revision="272089">A bug in &man.ipfw.4; that could
 509         potentially lead to a kernel panic when using &man.dummynet.4;
 510         at layer 2 has been fixed.</para>
 511     </sect2>
 512
 513     <sect2 xml:id="kernel-config">
 514       <title>Kernel Configuration</title>
 515
 516       <para revision="266531">The <literal>IMAGACT_BINMISC</literal>
 517         kernel configuration option has been enabled by default,
 518         which enables application execution through emulators, such
 519         as <application>Qemu</application>.</para>
 520
 521       <para revision="268045">The <literal>VT</literal> kernel
 522         configuration file has been removed, and the &man.vt.4;
 523         driver is included in the <literal>GENERIC</literal> kernel.
 524         To enable &man.vt.4;, enter <literal>set kern.vty=vt</literal>
 525         at the &man.loader.8; prompt during boot, or add
 526         <literal>kern.vty=vt</literal> to &man.loader.conf.5; and
 527         reboot the system.</para>
 528
 529       <para revision="277904">The &man.config.8; utility has been
 530         updated to allow using a non-standard <filename
 531           class="directory">src/</filename> tree, specified as an
 532         argument to the <literal>-s</literal> flag.</para>
 533
 534       <para revision="277990" arch="powerpc64">The
 535         &os;/&arch.powerpc64; kernel now builds as
 536         a position-independent executable, allowing the kernel to be
 537         loaded into and run from any physical or virtual
 538         address.</para>
 539
 540       <important>
 541         <para>This change requires an update to &man.loader.8;.
 542           The userland and kernel must be updated before rebooting the
 543           system.</para>
 544       </important>
 545     </sect2>
 546
 547     <sect2 xml:id="kernel-sysctl">
 548       <title>System Tuning and Controls</title>
 549
 550       <para>&nbsp;</para>
 551     </sect2>
 552   </sect1>
 553
 554   <sect1 xml:id="drivers">
 555     <title>Devices and Drivers</title>
 556
 557     <para>This section covers changes and additions to devices and
 558       device drivers since &release.prev;.</para>
 559
 560     <sect2 xml:id="drivers-device">
 561       <title>Device Drivers</title>
 562
 563       <para revision="260903">Support for GPS ports has been added to
 564         &man.uhso.4;.</para>
 565
 566       <para revision="265132">The &man.full.4; device has been added,
 567         and the <literal>lindev(4)</literal> device has been removed.
 568         Prior to this change, <literal>lindev(4)</literal> provided
 569         only the <filename>/dev/full</filename> character device,
 570         returning <literal>ENOSPC</literal> on write attempts.  As
 571         this device is not specific to &linux;, a native &os; version
 572         has been added.</para>
 573
 574       <para revision="271705">Hardware context support has been
 575         added to the <literal>drm/i915</literal> driver, adding
 576         support for <application>Mesa</application> 9.2 and
 577         later.</para>
 578
 579       <para revision="273178">The &man.vt.4; driver has been updated,
 580         replacing the bitmapped <literal>kern.vt.spclkeys</literal>
 581         &man.sysctl.8; with individual
 582         <literal>kern.vt.kbd_*</literal> variants.</para>
 583
 584       <para revision="273598">The &man.hpet.4; driver has been updated
 585         to create a
 586         <filename>/dev/hpet<replaceable>N</replaceable></filename>
 587         device, providing access to <acronym>HPET</acronym> from
 588         userspace.</para>
 589     </sect2>
 590
 591     <sect2 xml:id="drivers-storage">
 592       <title>Storage Drivers</title>
 593
 594       <para revision="265236" contrib="sponsor"
 595         sponsor="&lsi;, &spectralogic;" sponsorurl="">The &man.mpr.4;
 596         device has been added, providing support for LSI Fusion-MPT
 597         3 12Gb SCSI/SATA controllers.</para>
 598
 599       <para revision="265555" contrib="sponsor"
 600           sponsor="&lsi;">The &man.mrsas.4; driver has been added,
 601         providing support for LSI MegaRAID SAS controllers.  The
 602         &man.mfi.4; driver will attach to the controller, by default.
 603         To enable &man.mrsas.4; add
 604         <literal>hw.mfi.mrsas_enable=1</literal> to
 605         <filename>/boot/loader.conf</filename>, which turns off
 606         &man.mfi.4; device probing.</para>
 607
 608       <note>
 609         <para>At this time, the &man.mfiutil.8; utility and the &os;
 610           version of <application>MegaCLI</application> and
 611           <application>StorCli</application> do not work with
 612           &man.mrsas.4;.</para>
 613       </note>
 614
 615       <para revision="275461" contrib="sponsor" sponsor="&ix;">The
 616         &man.ctl.4; subsystem has been updated, increasing the ports
 617         limit from <literal>128</literal> to <literal>256</literal>,
 618         and <acronym>LUN</acronym> limit from <literal>256</literal>
 619         to <literal>1024</literal>.</para>
 620
 621       <para revision="276526">The <literal>asr(4)</literal> driver has
 622         been removed, and is no longer supported.</para>
 623     </sect2>
 624
 625     <sect2 xml:id="drivers-network">
 626       <title>Network Drivers</title>
 627
 628       <para revision="258830">Support for Broadcom chipsets BCM57764,
 629         BCM57767, BCM57782, BCM57786 and BCM57787 has been added to
 630         &man.bge.4;.</para>
 631
 632       <para revision="260448">Support for the &intel; Centrino&trade;
 633         Wireless-N 135 chipset has been added.</para>
 634
 635       <para revision="260552">Firmware for &intel; Centrino&trade;
 636         Wireless-N 105 devices has been added to the base
 637         system.</para>
 638
 639       <para revision="261975">The deprecated nve(4) driver has been
 640         removed.  Users of NVIDIA nForce MCP network adapters are
 641         advised to use the &man.nfe.4; driver instead, which has been
 642         the default driver for this hardware since
 643         &os;&nbsp;7.0.</para>
 644
 645       <para revision="264601" contrib="sponsor"
 646         sponsor="&darpa_afrl;">The <literal>if_nf10bmac(4)</literal>
 647         device has been added, providing support for NetFPGA-10G
 648         Embedded CPU Ethernet Core.</para>
 649
 650       <note>
 651         <para>The <literal>if_nf10bmac(4)</literal> driver operates on
 652           the FPGA, and is not suited for the PCI host
 653           interface.</para>
 654       </note>
 655
 656       <para revision="265348" contrib="sponsor"
 657         sponsor="&netgate;">The &man.ath.hal.4; driver has been
 658         updated to support the Atheros AR1111 chipset.</para>
 659
 660       <para revision="266770">Support for the &intel; Centrino&trade;
 661         Wireless-N 105 chipset has been added.</para>
 662
 663       <para revision="266757" contrib="sponsor"
 664         sponsor="&chelsio;">Support for the &man.cxgbe.4; Terminator
 665         5 (T5) 10G/40G cards has been added to &man.netmap.4;.</para>
 666
 667       <para revision="272730">The &man.alc.4; driver has been updated
 668         to support AR816x and AR817x ethernet controllers.</para>
 669
 670       <para revision="273331">The &man.vxlan.4; driver has been added,
 671         which creates a virtual Layer 2 (Ethernet) network overlaid in
 672         a Layer 3 (IP/UDP) network.  The &man.vxlan.4; driver is
 673         analogous to &man.vlan.4;, but is designed to be better suited
 674         for large, multiple-tenant datacenter environments.</para>
 675
 676       <para revision="274246" contrib="sponsor" sponsor="&yandex;">The
 677         &man.gre.4; driver has been significantly overhauled, and has
 678         been split into two separate modules, &man.gre.4; and
 679         &man.me.4;.</para>
 680     </sect2>
 681   </sect1>
 682
 683   <sect1 xml:id="hardware">
 684     <title>Hardware Support</title>
 685
 686     <para>This section covers general hardware support for physical
 687       machines, hypervisors, and virtualization environments, as well
 688       as hardware changes and updates that do not otherwise fit in
 689       other sections of this document.</para>
 690
 691     <sect2 xml:id="hardware-support">
 692       <title>Hardware Support</title>
 693
 694       <para revision="268303">The &man.asmc.4; driver has been
 695         updated to support the &apple;&nbsp;MacMini 3,1.</para>
 696
 697       <para revision="268351">Support for &os;/ia64 has been dropped
 698         as of &os;&nbsp;11.</para>
 699
 700       <para revision="274386">An issue that could cause a system to
 701         hang when entering <acronym>ACPI</acronym>
 702         <literal>S3</literal> state (suspend to
 703         <acronym>RAM</acronym>) has been corrected in the &man.acpi.4;
 704         and &man.pci.4; drivers.</para>
 705
 706       <para revision="274733" arch="powerpc">The power management unit
 707         subsystem has been updated to support power button events on
 708         certain &arch.powerpc; hardware, such as aluminum
 709         PowerBook&nbsp;&reg;.</para>
 710
 711       <para revision="275171,275190" arch="powerpc">The &man.hwpmc.4;
 712         driver has been updated to correct performance counter
 713         sampling on G4 (MPC74xxx) and G5 class processors.</para>
 714
 715       <para revision="275732" contrib="sponsor"
 716         sponsor="&ff;,&netgate;">The
 717         <application>OpenCrypto</application> framework has been
 718         updated to include <literal>AES-ICM</literal> and
 719         <literal>AES-GCM</literal> modes, both of which have also been
 720         added to the &man.aesni.4; driver.</para>
 721     </sect2>
 722
 723     <sect2 xml:id="hardware-virtualization">
 724       <title>Virtualization Support</title>
 725
 726       <para revision="260410">Support for the <quote>Virtual Interrupt
 727           Delivery</quote> feature of &intel;&nbsp;VT-x is enabled if
 728         supported by the CPU.  This feature can be disabled by running
 729         <literal>sysctl hw.vmm.vmx.use_apic_vid=0</literal>.
 730         Additionally, to persist this setting across reboots, add
 731         <literal>hw.vmm.vmx.use_apic_vid=0</literal> to
 732         <filename>/etc/sysctl.conf</filename>.</para>
 733
 734       <para revision="260532">Support for <quote>Posted Interrupt
 735           Processing</quote> is enabled if supported by the CPU.  This
 736         feature can be disabled by running <literal>sysctl
 737           hw.vmm.vmx.use_apic_pir=0</literal>.  Additionally, to
 738         persist this setting across reboots, add
 739         <literal>hw.vmm.vmx.use_apic_pir=0</literal> to
 740         <filename>/etc/sysctl.conf</filename>.</para>
 741
 742       <para revision="260582">Unmapped IO support has been added to
 743         &man.virtio_blk.4;.</para>
 744
 745       <para revision="260583">Unmapped IO support has been added to
 746         &man.virtio_scsi.4;.</para>
 747
 748       <para revision="260847">The &man.virtio_random.4; driver has
 749         been added to harvest entropy from the host system.</para>
 750
 751       <para revision="261504">&os;/&arch.i386; guests can be run under
 752         bhyve.</para>
 753
 754       <para revision="267536" contrib="sponsor"
 755         sponsor="&citrix.rd;">Support for running a &os;/&arch.amd64;
 756         <application>Xen</application> guest instance as
 757         <acronym>PVH</acronym> guest has been added.
 758         <acronym>PVH</acronym> mode, short for <quote>Para-Virtualized
 759           Hardware</quote>, uses para-virtualized drivers for boot and
 760         I/O, and uses hardware virtualization extensions for all other
 761         tasks, without the need for emulation.</para>
 762
 763       <para revision="273515">The &man.virtio.console.4; driver has
 764         been added, which provides an interface to VirtIO console
 765         devices through a &man.tty.4; device.</para>
 766     </sect2>
 767
 768     <sect2 xml:id="hardware-arm">
 769       <title>ARM Support</title>
 770
 771       <para revision="260921">The &man.nand.4; device is enabled for
 772         ARM devices by default.</para>
 773
 774       <para revision="273264" arch="armv6">An issue that could cause
 775         instability when detecting <acronym>SD</acronym> cards on the
 776         Raspberry Pi <acronym>SOC</acronym> has been fixed.</para>
 777
 778       <para revision="275963">The <literal>bcm2835_cpufreq</literal>
 779         driver has been added, which supports <acronym>CPU</acronym>
 780         frequency and voltage control on the Raspberry Pi
 781         <acronym>SOC</acronym>.</para>
 782     </sect2>
 783   </sect1>
 784
 785   <sect1 xml:id="storage">
 786     <title>Storage</title>
 787
 788     <para>This section covers changes and additions to file systems
 789       and other storage subsystems, both local and networked.</para>
 790
 791     <sect2 xml:id="storage-general">
 792       <title>General Storage</title>
 793
 794       <para revision="278037" contrib="sponsor" sponsor="&ix;">The
 795         &man.cam.4; <acronym>LUN</acronym> mapping has been rewritten,
 796         replacing <acronym>iSCSI</acronym>-specific mapping mechanisms
 797         with a new mechanism that works for any port.</para>
 798     </sect2>
 799
 800     <sect2 xml:id="storage-net">
 801       <title>Networked Storage</title>
 802
 803       <para revision="270096" contrib="sponsor" sponsor="&ff;">The new
 804         filesystem automount facility, &man.autofs.5;, has been added.
 805         The new &man.autofs.5; facility is similar to that found in
 806         other &unix;-like operating systems, such as OS&nbsp;X&trade;
 807         and Solaris&trade;.  The &man.autofs.5; facility uses
 808         a &sun;-compatible &man.auto.master.5; configuration file, and
 809         is administered with the &man.automount.8; userland utility,
 810         and the &man.automountd.8; and &man.autounmountd.8;
 811         daemons.</para>
 812     </sect2>
 813
 814     <sect2 xml:id="storage-zfs">
 815       <title>ZFS</title>
 816
 817       <para revision="275748">The <literal>arc_meta_limit</literal>
 818         statistics are now visible through the
 819         <literal>kstat</literal> &man.sysctl.8;.  As a result of this
 820         change, the <literal>vfs.zfs.arc_meta_used</literal>
 821         &man.sysctl.8; has been removed, and replaced with the
 822         <literal>kstat.zfs.misc.arcstats.arc_meta_used</literal>
 823         &man.sysctl.8;.</para>
 824     </sect2>
 825
 826     <sect2 xml:id="storage-geom">
 827       <title>&man.geom.4;</title>
 828
 829       <para revision="267359">Support for the
 830         <literal>disklabel64</literal> partitioning scheme has been
 831         added to &man.gpart.8;.</para>
 832     </sect2>
 833   </sect1>
 834
 835   <sect1 xml:id="boot">
 836     <title>Boot Loader Changes</title>
 837
 838     <para>This section covers the boot loader, boot menu, and other
 839       boot-related changes.</para>
 840
 841     <sect2 xml:id="boot-loader">
 842       <title>Boot Loader Changes</title>
 843
 844       <para revision="274085">The &man.vt.4; driver has been made the
 845         default system console driver.  The &man.syscons.4; driver is
 846         still available, and can be enabled by adding
 847         <literal>kern.vty=sc</literal> in &man.loader.conf.5;.
 848         Alternatively, &man.syscons.4; can be enabled at boot time by
 849         entering <literal>set kern.vty=sc</literal> at the
 850         &man.loader.8; prompt.</para>
 851     </sect2>
 852
 853     <sect2 xml:id="boot-menu">
 854       <title>Boot Menu Changes</title>
 855
 856       <para>&nbsp;</para>
 857     </sect2>
 858   </sect1>
 859
 860   <sect1 xml:id="network">
 861     <title>Networking</title>
 862
 863     <para>This section describes changes that affect networking in
 864       &os;.</para>
 865
 866     <sect2 xml:id="network-protocols">
 867       <title>Network Procols</title>
 868
 869       <para revision="263140">Support for the IPX network transport
 870         protocol has been removed, and will not be supported in
 871         &os;&nbsp;11 and later releases.</para>
 872
 873       <para revision="272720" contrib="sponsor"
 874         sponsor="&limelight;">Support for <acronym>PLPMTUD</acronym>
 875         blackhole detection (<acronym>RFC</acronym> 4821) has been
 876         added to the &man.tcp.4; stack, disabled by default.  New
 877         control tunables have been added:</para>
 878
 879       <informaltable frame="none" pgwide="0">
 880         <tgroup cols="2">
 881           <colspec colwidth="1*"/>
 882           <colspec colwidth="1*"/>
 883           <thead>
 884             <row>
 885               <entry>Tunable</entry>
 886               <entry>Description</entry>
 887             </row>
 888           </thead>
 889
 890           <tbody>
 891             <row>
 892               <entry><literal>net.inet.tcp.pmtud_blackhole_detection</literal></entry>
 893               <entry>Enables or disables <acronym>PLPMTUD</acronym>
 894                 blackhole detection</entry>
 895             </row>
 896
 897             <row>
 898               <entry><literal>net.inet.tcp.pmtud_blackhole_mss</literal></entry>
 899               <entry><acronym>MSS</acronym> to try for IPv4</entry>
 900             </row>
 901
 902             <row>
 903               <entry><literal>net.inet.tcp.v6pmtud_blackhole_mss</literal></entry>
 904               <entry><acronym>MSS to try for IPv6</acronym></entry>
 905             </row>
 906           </tbody>
 907         </tgroup>
 908       </informaltable>
 909
 910       <para>New monitoring &man.sysctl.8;s haven been added:</para>
 911
 912       <informaltable frame="none" pgwide="0">
 913         <tgroup cols="2">
 914           <colspec colwidth="1*"/>
 915           <colspec colwidth="1*"/>
 916           <thead>
 917             <row>
 918               <entry>Tunable</entry>
 919               <entry>Description</entry>
 920             </row>
 921           </thead>
 922
 923           <tbody>
 924             <row>
 925               <entry><literal>net.inet.tcp.pmtud_blackhole_activated</literal></entry>
 926               <entry>Number of times the code was activated to attempt
 927                 downshifting the <acronym>MSS</acronym></entry>
 928             </row>
 929
 930             <row>
 931               <entry><literal>net.inet.tcp.pmtud_blackhole_min_activated</literal></entry>
 932               <entry>Number of times the blackhole
 933                 <acronym>MSS</acronym> was used in an attempt to
 934                 downshift</entry>
 935             </row>
 936
 937             <row>
 938               <entry><literal>net.inet.tcp.pmtud_blackhole_failed</literal></entry>
 939               <entry>Number of times that the blackhole failed to
 940                 connect after downshifting the
 941                 <acronym>MSS</acronym></entry>
 942             </row>
 943           </tbody>
 944         </tgroup>
 945       </informaltable>
 946     </sect2>
 947   </sect1>
 948
 949   <sect1 xml:id="ports">
 950     <title>Ports Collection and Package Infrastructure</title>
 951
 952     <para>This section covers changes to the &os;&nbsp;Ports
 953       Collection, package infrastructure, and package maintenance and
 954       installation tools.</para>
 955
 956     <sect2 xml:id="ports-infrastructure">
 957       <title>Infrastructure Changes</title>
 958
 959       <para>&nbsp;</para>
 960     </sect2>
 961
 962     <sect2 xml:id="ports-packages ">
 963       <title>Packaging Changes</title>
 964
 965       <para>&nbsp;</para>
 966     </sect2>
 967   </sect1>
 968
 969   <sect1 xml:id="doc">
 970     <title>Documentation</title>
 971
 972     <para>This section covers changes to the &os;&nbsp;Documentation
 973       Project sources and toolchain.</para>
 974
 975     <sect2 xml:id="doc-sources">
 976       <title>Documentation Source Changes</title>
 977
 978       <para>&nbsp;</para>
 979     </sect2>
 980
 981     <sect2 xml:id="doc-toolchain">
 982       <title>Documentation Toolchain Changes</title>
 983
 984       <para>&nbsp;</para>
 985     </sect2>
 986   </sect1>
 987
 988   <sect1 xml:id="releng">
 989     <title>Release Engineering and Integration</title>
 990
 991     <para>This section convers changes that are specific to the
 992       &os;&nbsp;Release Engineering processes.</para>
 993
 994     <sect2 xml:id="releng-changes">
 995       <title>Integration Changes</title>
 996
 997       <para revision="277458" contrib="sponsor" sponsor="&ff;">The
 998         Release Engineering build tools have been updated to include
 999         support for producing virtual machine disk images for various
1000         cloud hosting providers.</para>
1001     </sect2>
1002   </sect1>
1003 </article>