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

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   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: 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
 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 throughly completed.</para>
 320     </sect2>
 321
 322     <sect2 xml:id="userland-contrib">
 323       <title>Contributed Software</title>
 324
 325       <para revision="258884" contrib="sponsor"
 326         sponsor="&darpa_afrl;">&man.lldb.1; has been updated to
 327         upstream snapshot version r196259.</para>
 328
 329       <para revision="259626">Timezone data files have been updated to
 330         version 2013i.</para>
 331
 332       <para revision="260445">&man.byacc.1; has been updated to
 333         version 20140101.</para>
 334
 335       <para revision="261071">&man.jemalloc.3; has been updated to
 336         version 3.5.0.</para>
 337
 338       <para revision="261212"><application>bmake</application> has
 339         been updated to version 20140101.</para>
 340
 341       <para revision="261283"><application>libc++</application> has
 342         been updated to version 3.4.</para>
 343
 344       <para revision="261320"><application>OpenSSH</application> has
 345         been updated to 6.5p1.</para>
 346
 347       <para revision="261344"><application>mdocml</application> has
 348         been updated to version 1.12.3.</para>
 349
 350       <para revision="261991"><application>LLVM</application> and
 351         <application>Clang</application> have been updated to
 352         version 3.4.</para>
 353
 354       <para revision="266527"
 355         role="merged"><application>Sendmail</application> has been
 356         updated from 8.14.7 to 8.14.9.</para>
 357
 358       <para revision="276577"><application>file</application> has been
 359         updated to version 5.22.</para>
 360
 361       <para revision="275718">The <application>binutils</application>
 362         suite of utilities has been updated to include upstream
 363         patches that add new relocations for &arch.powerpc;
 364         support.</para>
 365
 366       <para revision="276398" contrib="sponsor" sponsor="&ff;">The
 367         <application>ELF Tool Chain</application> has been updated to
 368         upstream revision r3136.</para>
 369
 370       <para revision="276551">The <application>texinfo</application>
 371         utility and <literal>info</literal> pages were removed from
 372         the base system.  The <filename
 373           role="package">print/texinfo</filename> port should be
 374         installed on systems where <literal>info</literal> pages are
 375         needed.</para>
 376
 377       <para revision="276796" contrib="sponsor" sponsor="&ff;">The ELF
 378         object manipulation tools
 379         <application>addr2line</application>,
 380         <application>elfcopy (strip)</application>,
 381         <application>nm</application>,
 382         <application>size</application>, and
 383         <application>strings</application> were switched to the
 384         versions from the ELF Tool Chain project.</para>
 385
 386       <para revision="276881">The <literal>libedit</literal> library
 387         has been updated to include <acronym>UTF-8</acronym> support,
 388         adding <acronym>UTF-8</acronym> support to the &man.sh.1;
 389         shell.</para>
 390
 391       <para revision="277270"><application>OpenSSL</application> has
 392         been updated to version 1.0.1l.</para>
 393
 394       <para revision="278433">The &man.xz.1; utility has been udpated
 395         to version 5.2.0.</para>
 396
 397       <para revision="278433">The &man.xz.1; utility has been updated
 398         to support multi-threaded compression.</para>
 399
 400       <para revision="278970">The &man.acpi.4; subsystem has been
 401         updated to version 20150204.</para>
 402     </sect2>
 403
 404     <sect2 xml:id="userland-installer">
 405       <title>Installation and Configuration Tools</title>
 406
 407       <para revision="271539">The &man.bsdinstall.8; partition editor
 408         and &man.sade.8; utility have been updated to include native
 409         <acronym>ZFS</acronym> support.</para>
 410
 411       <para revision="272274">The &os; installation utility,
 412         &man.bsdinstall.8;, has been updated to set the
 413         <literal>canmount</literal> &man.zfs.8; property to
 414         <literal>off</literal> for the <filename
 415           class="directory">/var</filename> dataset, preventing the
 416         contents of directories within <filename
 417           class="directory">/var</filename> from conflicting when
 418         using multiple boot environments, such as that provided by
 419         <filename role="package">sysutils/beadm</filename>.</para>
 420
 421       <para revision="274394">The &man.bsdconfig.8; utility has been
 422         updated to skip the initial &man.tzsetup.8;
 423         <acronym>UTC</acronym> versus wall-clock time prompt when run
 424         in a virtual machine, determined when the
 425         <literal>kern.vm_guest</literal> &man.sysctl.8; is set to
 426         <literal>1</literal>.</para>
 427
 428       <para revision="275874">The &man.bsdinstall.8; utility has been
 429         updated to use the new &man.dpv.3; library to display progress
 430         when extracting the &os; distributions.</para>
 431     </sect2>
 432
 433     <sect2 xml:id="userland-rc">
 434       <title><filename class="directory">/etc/rc.d</filename>
 435         Scripts</title>
 436
 437       <para revision="270676">The &man.rc.8; subsystem has been
 438         updated to allow configuring services in <filename
 439           class="directory">&dollar;{LOCALBASE}/etc/rc.conf.d/</filename>.
 440         If <literal>LOCALBASE</literal> is unset, it defaults to
 441         <filename class="directory">/usr/local</filename>.</para>
 442
 443       <para revision="275299">The <filename>mrouted</filename>
 444         &man.rc.8; script has been removed from the base system.  An
 445         equivalent script is available from the <filename
 446           role="package">net/mrouted</filename> port.</para>
 447
 448       <para revision="279463" contrib="sponsor"
 449         sponsor="&sandvine;">A new &man.rc.8; script,
 450         <filename>iovctl</filename>, has been added, which allows
 451         automatically starting the &man.iovctl.8; utility at
 452         boot.</para>
 453     </sect2>
 454
 455     <sect2 xml:id="userland-periodic">
 456       <title><filename class="directory">/etc/periodic</filename>
 457         Scripts</title>
 458
 459       <para revision="271321">The daily &man.periodic.8; script
 460         <filename>110.clean-tmps</filename> has been updated to avoid
 461         crossing filesystem mount boundaries when cleaning files in
 462         <filename class="directory">/tmp</filename>.</para>
 463     </sect2>
 464
 465     <sect2 xml:id="userland-libraries">
 466       <title>Runtime Libraries and API</title>
 467
 468       <para revision="268461">The &man.readline.3; library is now
 469         statically linked in software within the base system, and the
 470         shared library is no longer installed, allowing the Ports
 471         Collection to use a modern version of the library.</para>
 472
 473       <para revision="272273">The &man.strptime.3; library has been
 474         updated to add support for <acronym>POSIX</acronym>-2001
 475         features <literal>%U</literal> and
 476         <literal>%W</literal>.</para>
 477
 478       <para revision="272842,272848" contrib="sponsor"
 479         sponsor="&ff;">The &man.dl.iterate.phdr.3; library has been
 480         changed to always return the path name of the
 481         <acronym>ELF</acronym> object in the
 482         <literal>dlpi_name</literal> structure member.</para>
 483
 484       <para revision="273806" contrib="sponsor" sponsor="&chelsio;">A
 485         userland library for Chelsio Terminator 5 based iWARP cards
 486         has been added, allowing userland <acronym>RDMA</acronym>
 487         applications to work over compatible
 488         <acronym>NIC</acronym>s.</para>
 489
 490       <para revision="274987">The &man.gpio.3; library has been added,
 491         providing a wrapper around the &man.gpio.4; kernel
 492         interface.</para>
 493
 494       <para revision="277610">The <literal>futimens()</literal> and
 495         <literal>utimensat()</literal> system calls have been
 496         added.  See &man.utimensat.2; for more information.</para>
 497
 498       <para revision="278934">The &man.elf.3; compile-time dependency
 499         has been removed from <filename>dtri.o</filename>, which
 500         allows adding <application>DTrace</application> probes to
 501         userland applications and libraries without also linking
 502         against &man.elf.3;.</para>
 503
 504       <para revision="279186">The &man.setmode.3; function has been
 505         updated to consistently set <literal>errno</literal> on
 506         failure.</para>
 507
 508       <para revision="279663">The &man.qsort.3; functions have been
 509         updated to be able to handle 32-bit aligned data on 64-bit
 510         platforms, also providing a significant improvement in 32-bit
 511         workloads.</para>
 512     </sect2>
 513
 514     <sect2 xml:id="userland-abi">
 515       <title>ABI Compatibility</title>
 516
 517       <para revision="271982">The &linux; compatibility version has
 518         been updated to <literal>2.6.18</literal>.  The
 519         <literal>compat.linux.osrelease</literal> &man.sysctl.8; is
 520         evaluated when building the <filename
 521           role="package">emulators/linux-c6</filename> and related
 522         ports.</para>
 523     </sect2>
 524   </sect1>
 525
 526   <sect1 xml:id="kernel">
 527     <title>Kernel</title>
 528
 529     <para>This section covers changes to kernel configurations, system
 530       tuning, and system control parameters that are not otherwise
 531       categorized.</para>
 532
 533     <sect2 xml:id="kernel-bugfix">
 534       <title>Kernel Bug Fixes</title>
 535
 536       <para revision="265876">A kernel bug that inhibited proper
 537         functionality of the <literal>dev.cpu.0.freq</literal>
 538         &man.sysctl.8; on &intel; processors with Turbo
 539         Boost&nbsp;&trade; enabled has been fixed.</para>
 540
 541       <para revision="271697" arch="powerpc">Support for
 542         &man.dtrace.1; stack tracing has been fixed for
 543         &os;/&arch.powerpc;, using the <literal>trapexit()</literal>
 544         and <literal>asttrapexit()</literal> functions instead of
 545         checking within addressed kernel space.</para>
 546
 547       <para revision="272089">A bug in &man.ipfw.4; that could
 548         potentially lead to a kernel panic when using &man.dummynet.4;
 549         at layer 2 has been fixed.</para>
 550     </sect2>
 551
 552     <sect2 xml:id="kernel-config">
 553       <title>Kernel Configuration</title>
 554
 555       <para revision="266531">The <literal>IMAGACT_BINMISC</literal>
 556         kernel configuration option has been enabled by default,
 557         which enables application execution through emulators, such
 558         as <application>Qemu</application>.</para>
 559
 560       <para revision="268045">The <literal>VT</literal> kernel
 561         configuration file has been removed, and the &man.vt.4;
 562         driver is included in the <literal>GENERIC</literal> kernel.
 563         To enable &man.vt.4;, enter <literal>set kern.vty=vt</literal>
 564         at the &man.loader.8; prompt during boot, or add
 565         <literal>kern.vty=vt</literal> to &man.loader.conf.5; and
 566         reboot the system.</para>
 567
 568       <para revision="277904">The &man.config.8; utility has been
 569         updated to allow using a non-standard <filename
 570           class="directory">src/</filename> tree, specified as an
 571         argument to the <literal>-s</literal> flag.</para>
 572
 573       <para revision="277990" arch="powerpc64">The
 574         &os;/&arch.powerpc64; kernel now builds as
 575         a position-independent executable, allowing the kernel to be
 576         loaded into and run from any physical or virtual
 577         address.</para>
 578
 579       <important>
 580         <para>This change requires an update to &man.loader.8;.
 581           The userland and kernel must be updated before rebooting the
 582           system.</para>
 583       </important>
 584
 585       <para revision="279189" contrib="sponsor" sponsor="&ff;"
 586         arch="powerpc">Kernel support for Vector-Scalar eXtension
 587         (<acronym>VSX</acronym>) found on POWER7 and POWER8 hardware
 588         has been added.</para>
 589
 590       <para revision="279252" contrib="sponsor" sponsor="&ff;"
 591         arch="powerpc">The &man.pmap.9; implementation for 64-bit
 592         &powerpc; processors has been overhaulded to improve
 593         concurrency.</para>
 594     </sect2>
 595
 596     <sect2 xml:id="kernel-sysctl">
 597       <title>System Tuning and Controls</title>
 598
 599       <para revision="275140" contrib="sponsor" sponsor="&ff;">The
 600         &man.hwpmc.4; default and maximum callchain depths have been
 601         increased.  The default has been increased from 16 to 32, and
 602         the maximum increased from 32 to 128.</para>
 603
 604       <para revision="279361">The <literal>kern.osrelease</literal>
 605         and <literal>kern.osreldate</literal> are now configurable
 606         &man.jail.8; parameters.</para>
 607     </sect2>
 608   </sect1>
 609
 610   <sect1 xml:id="drivers">
 611     <title>Devices and Drivers</title>
 612
 613     <para>This section covers changes and additions to devices and
 614       device drivers since &release.prev;.</para>
 615
 616     <sect2 xml:id="drivers-device">
 617       <title>Device Drivers</title>
 618
 619       <para revision="260903">Support for GPS ports has been added to
 620         &man.uhso.4;.</para>
 621
 622       <para revision="265132">The &man.full.4; device has been added,
 623         and the <literal>lindev(4)</literal> device has been removed.
 624         Prior to this change, <literal>lindev(4)</literal> provided
 625         only the <filename>/dev/full</filename> character device,
 626         returning <literal>ENOSPC</literal> on write attempts.  As
 627         this device is not specific to &linux;, a native &os; version
 628         has been added.</para>
 629
 630       <para revision="271705">Hardware context support has been
 631         added to the <literal>drm/i915</literal> driver, adding
 632         support for <application>Mesa</application> 9.2 and
 633         later.</para>
 634
 635       <para revision="273178">The &man.vt.4; driver has been updated,
 636         replacing the bitmapped <literal>kern.vt.spclkeys</literal>
 637         &man.sysctl.8; with individual
 638         <literal>kern.vt.kbd_*</literal> variants.</para>
 639
 640       <para revision="273598">The &man.hpet.4; driver has been updated
 641         to create a
 642         <filename>/dev/hpet<replaceable>N</replaceable></filename>
 643         device, providing access to <acronym>HPET</acronym> from
 644         userspace.</para>
 645     </sect2>
 646
 647     <sect2 xml:id="drivers-storage">
 648       <title>Storage Drivers</title>
 649
 650       <para revision="265236" contrib="sponsor"
 651         sponsor="&lsi;, &spectralogic;" sponsorurl="">The &man.mpr.4;
 652         device has been added, providing support for LSI Fusion-MPT
 653         3 12Gb SCSI/SATA controllers.</para>
 654
 655       <para revision="265555" contrib="sponsor"
 656           sponsor="&lsi;">The &man.mrsas.4; driver has been added,
 657         providing support for LSI MegaRAID SAS controllers.  The
 658         &man.mfi.4; driver will attach to the controller, by default.
 659         To enable &man.mrsas.4; add
 660         <literal>hw.mfi.mrsas_enable=1</literal> to
 661         <filename>/boot/loader.conf</filename>, which turns off
 662         &man.mfi.4; device probing.</para>
 663
 664       <note>
 665         <para>At this time, the &man.mfiutil.8; utility and the &os;
 666           version of <application>MegaCLI</application> and
 667           <application>StorCli</application> do not work with
 668           &man.mrsas.4;.</para>
 669       </note>
 670
 671       <para revision="275461" contrib="sponsor" sponsor="&ix;">The
 672         &man.ctl.4; subsystem has been updated, increasing the ports
 673         limit from <literal>128</literal> to <literal>256</literal>,
 674         and <acronym>LUN</acronym> limit from <literal>256</literal>
 675         to <literal>1024</literal>.</para>
 676
 677       <para revision="276526">The <literal>asr(4)</literal> driver has
 678         been removed, and is no longer supported.</para>
 679     </sect2>
 680
 681     <sect2 xml:id="drivers-network">
 682       <title>Network Drivers</title>
 683
 684       <para revision="258830">Support for Broadcom chipsets BCM57764,
 685         BCM57767, BCM57782, BCM57786 and BCM57787 has been added to
 686         &man.bge.4;.</para>
 687
 688       <para revision="260448">Support for the &intel; Centrino&trade;
 689         Wireless-N 135 chipset has been added.</para>
 690
 691       <para revision="260552">Firmware for &intel; Centrino&trade;
 692         Wireless-N 105 devices has been added to the base
 693         system.</para>
 694
 695       <para revision="261975">The deprecated nve(4) driver has been
 696         removed.  Users of NVIDIA nForce MCP network adapters are
 697         advised to use the &man.nfe.4; driver instead, which has been
 698         the default driver for this hardware since
 699         &os;&nbsp;7.0.</para>
 700
 701       <para revision="264601" contrib="sponsor"
 702         sponsor="&darpa_afrl;">The <literal>if_nf10bmac(4)</literal>
 703         device has been added, providing support for NetFPGA-10G
 704         Embedded CPU Ethernet Core.</para>
 705
 706       <note>
 707         <para>The <literal>if_nf10bmac(4)</literal> driver operates on
 708           the FPGA, and is not suited for the PCI host
 709           interface.</para>
 710       </note>
 711
 712       <para revision="265348" contrib="sponsor"
 713         sponsor="&netgate;">The &man.ath.hal.4; driver has been
 714         updated to support the Atheros AR1111 chipset.</para>
 715
 716       <para revision="266770">Support for the &intel; Centrino&trade;
 717         Wireless-N 105 chipset has been added.</para>
 718
 719       <para revision="266757" contrib="sponsor"
 720         sponsor="&chelsio;">Support for the &man.cxgbe.4; Terminator
 721         5 (T5) 10G/40G cards has been added to &man.netmap.4;.</para>
 722
 723       <para revision="272730">The &man.alc.4; driver has been updated
 724         to support AR816x and AR817x ethernet controllers.</para>
 725
 726       <para revision="273331">The &man.vxlan.4; driver has been added,
 727         which creates a virtual Layer 2 (Ethernet) network overlaid in
 728         a Layer 3 (IP/UDP) network.  The &man.vxlan.4; driver is
 729         analogous to &man.vlan.4;, but is designed to be better suited
 730         for large, multiple-tenant datacenter environments.</para>
 731
 732       <para revision="274246" contrib="sponsor" sponsor="&yandex;">The
 733         &man.gre.4; driver has been significantly overhauled, and has
 734         been split into two separate modules, &man.gre.4; and
 735         &man.me.4;.</para>
 736     </sect2>
 737   </sect1>
 738
 739   <sect1 xml:id="hardware">
 740     <title>Hardware Support</title>
 741
 742     <para>This section covers general hardware support for physical
 743       machines, hypervisors, and virtualization environments, as well
 744       as hardware changes and updates that do not otherwise fit in
 745       other sections of this document.</para>
 746
 747     <sect2 xml:id="hardware-support">
 748       <title>Hardware Support</title>
 749
 750       <para revision="268303">The &man.asmc.4; driver has been
 751         updated to support the &apple;&nbsp;MacMini 3,1.</para>
 752
 753       <para revision="268351">Support for &os;/ia64 has been dropped
 754         as of &os;&nbsp;11.</para>
 755
 756       <para revision="274386">An issue that could cause a system to
 757         hang when entering <acronym>ACPI</acronym>
 758         <literal>S3</literal> state (suspend to
 759         <acronym>RAM</acronym>) has been corrected in the &man.acpi.4;
 760         and &man.pci.4; drivers.</para>
 761
 762       <para revision="274733" arch="powerpc">The power management unit
 763         subsystem has been updated to support power button events on
 764         certain &arch.powerpc; hardware, such as aluminum
 765         PowerBook&nbsp;&reg;.</para>
 766
 767       <para revision="275171,275190" arch="powerpc">The &man.hwpmc.4;
 768         driver has been updated to correct performance counter
 769         sampling on G4 (MPC74xxx) and G5 class processors.</para>
 770
 771       <para revision="275732" contrib="sponsor"
 772         sponsor="&ff;,&netgate;">The
 773         <application>OpenCrypto</application> framework has been
 774         updated to include <literal>AES-ICM</literal> and
 775         <literal>AES-GCM</literal> modes, both of which have also been
 776         added to the &man.aesni.4; driver.</para>
 777     </sect2>
 778
 779     <sect2 xml:id="hardware-virtualization">
 780       <title>Virtualization Support</title>
 781
 782       <para revision="260410">Support for the <quote>Virtual Interrupt
 783           Delivery</quote> feature of &intel;&nbsp;VT-x is enabled if
 784         supported by the CPU.  This feature can be disabled by running
 785         <literal>sysctl hw.vmm.vmx.use_apic_vid=0</literal>.
 786         Additionally, to persist this setting across reboots, add
 787         <literal>hw.vmm.vmx.use_apic_vid=0</literal> to
 788         <filename>/etc/sysctl.conf</filename>.</para>
 789
 790       <para revision="260532">Support for <quote>Posted Interrupt
 791           Processing</quote> is enabled if supported by the CPU.  This
 792         feature can be disabled by running <literal>sysctl
 793           hw.vmm.vmx.use_apic_pir=0</literal>.  Additionally, to
 794         persist this setting across reboots, add
 795         <literal>hw.vmm.vmx.use_apic_pir=0</literal> to
 796         <filename>/etc/sysctl.conf</filename>.</para>
 797
 798       <para revision="260582">Unmapped IO support has been added to
 799         &man.virtio_blk.4;.</para>
 800
 801       <para revision="260583">Unmapped IO support has been added to
 802         &man.virtio_scsi.4;.</para>
 803
 804       <para revision="260847">The &man.virtio_random.4; driver has
 805         been added to harvest entropy from the host system.</para>
 806
 807       <para revision="261504">&os;/&arch.i386; guests can be run under
 808         bhyve.</para>
 809
 810       <para revision="267536" contrib="sponsor"
 811         sponsor="&citrix.rd;">Support for running a &os;/&arch.amd64;
 812         <application>Xen</application> guest instance as
 813         <acronym>PVH</acronym> guest has been added.
 814         <acronym>PVH</acronym> mode, short for <quote>Para-Virtualized
 815           Hardware</quote>, uses para-virtualized drivers for boot and
 816         I/O, and uses hardware virtualization extensions for all other
 817         tasks, without the need for emulation.</para>
 818
 819       <para revision="273515">The &man.virtio.console.4; driver has
 820         been added, which provides an interface to VirtIO console
 821         devices through a &man.tty.4; device.</para>
 822     </sect2>
 823
 824     <sect2 xml:id="hardware-arm">
 825       <title>ARM Support</title>
 826
 827       <para revision="260921">The &man.nand.4; device is enabled for
 828         ARM devices by default.</para>
 829
 830       <para revision="273264" arch="armv6">An issue that could cause
 831         instability when detecting <acronym>SD</acronym> cards on the
 832         Raspberry Pi <acronym>SOC</acronym> has been fixed.</para>
 833
 834       <para revision="275963">The <literal>bcm2835_cpufreq</literal>
 835         driver has been added, which supports <acronym>CPU</acronym>
 836         frequency and voltage control on the Raspberry Pi
 837         <acronym>SOC</acronym>.</para>
 838     </sect2>
 839   </sect1>
 840
 841   <sect1 xml:id="storage">
 842     <title>Storage</title>
 843
 844     <para>This section covers changes and additions to file systems
 845       and other storage subsystems, both local and networked.</para>
 846
 847     <sect2 xml:id="storage-general">
 848       <title>General Storage</title>
 849       <para revision="278037" contrib="sponsor" sponsor="&ix;">The
 850         &man.ctl.4; <acronym>LUN</acronym> mapping has been rewritten,
 851         replacing <acronym>iSCSI</acronym>-specific mapping mechanisms
 852         with a new mechanism that works for any port.</para>
 853
 854       <para revision="278354" contrib="sponsor" sponsor="&ix;">The
 855         &man.ctld.8; utility has been updated to allow controlling
 856         non-<acronym>iSCSI</acronym> &man.ctl.4; ports.</para>
 857     </sect2>
 858
 859     <sect2 xml:id="storage-net">
 860       <title>Networked Storage</title>
 861
 862       <para revision="270096" contrib="sponsor" sponsor="&ff;">The new
 863         filesystem automount facility, &man.autofs.5;, has been added.
 864         The new &man.autofs.5; facility is similar to that found in
 865         other &unix;-like operating systems, such as OS&nbsp;X&trade;
 866         and Solaris&trade;.  The &man.autofs.5; facility uses
 867         a &sun;-compatible &man.auto.master.5; configuration file, and
 868         is administered with the &man.automount.8; userland utility,
 869         and the &man.automountd.8; and &man.autounmountd.8;
 870         daemons.</para>
 871     </sect2>
 872
 873     <sect2 xml:id="storage-zfs">
 874       <title>ZFS</title>
 875
 876       <para revision="275748">The <literal>arc_meta_limit</literal>
 877         statistics are now visible through the
 878         <literal>kstat</literal> &man.sysctl.8;.  As a result of this
 879         change, the <literal>vfs.zfs.arc_meta_used</literal>
 880         &man.sysctl.8; has been removed, and replaced with the
 881         <literal>kstat.zfs.misc.arcstats.arc_meta_used</literal>
 882         &man.sysctl.8;.</para>
 883     </sect2>
 884
 885     <sect2 xml:id="storage-geom">
 886       <title>&man.geom.4;</title>
 887
 888       <para revision="267359">Support for the
 889         <literal>disklabel64</literal> partitioning scheme has been
 890         added to &man.gpart.8;.</para>
 891     </sect2>
 892   </sect1>
 893
 894   <sect1 xml:id="boot">
 895     <title>Boot Loader Changes</title>
 896
 897     <para>This section covers the boot loader, boot menu, and other
 898       boot-related changes.</para>
 899
 900     <sect2 xml:id="boot-loader">
 901       <title>Boot Loader Changes</title>
 902
 903       <para revision="274085">The &man.vt.4; driver has been made the
 904         default system console driver.  The &man.syscons.4; driver is
 905         still available, and can be enabled by adding
 906         <literal>kern.vty=sc</literal> in &man.loader.conf.5;.
 907         Alternatively, &man.syscons.4; can be enabled at boot time by
 908         entering <literal>set kern.vty=sc</literal> at the
 909         &man.loader.8; prompt.</para>
 910     </sect2>
 911
 912     <sect2 xml:id="boot-menu">
 913       <title>Boot Menu Changes</title>
 914
 915       <para>&nbsp;</para>
 916     </sect2>
 917   </sect1>
 918
 919   <sect1 xml:id="network">
 920     <title>Networking</title>
 921
 922     <para>This section describes changes that affect networking in
 923       &os;.</para>
 924
 925     <sect2 xml:id="network-protocols">
 926       <title>Network Procols</title>
 927
 928       <para revision="263140">Support for the IPX network transport
 929         protocol has been removed, and will not be supported in
 930         &os;&nbsp;11 and later releases.</para>
 931
 932       <para revision="272720" contrib="sponsor"
 933         sponsor="&limelight;">Support for <acronym>PLPMTUD</acronym>
 934         blackhole detection (<acronym>RFC</acronym> 4821) has been
 935         added to the &man.tcp.4; stack, disabled by default.  New
 936         control tunables have been added:</para>
 937
 938       <informaltable frame="none" pgwide="0">
 939         <tgroup cols="2">
 940           <colspec colwidth="1*"/>
 941           <colspec colwidth="1*"/>
 942           <thead>
 943             <row>
 944               <entry>Tunable</entry>
 945               <entry>Description</entry>
 946             </row>
 947           </thead>
 948
 949           <tbody>
 950             <row>
 951               <entry><literal>net.inet.tcp.pmtud_blackhole_detection</literal></entry>
 952               <entry>Enables or disables <acronym>PLPMTUD</acronym>
 953                 blackhole detection</entry>
 954             </row>
 955
 956             <row>
 957               <entry><literal>net.inet.tcp.pmtud_blackhole_mss</literal></entry>
 958               <entry><acronym>MSS</acronym> to try for IPv4</entry>
 959             </row>
 960
 961             <row>
 962               <entry><literal>net.inet.tcp.v6pmtud_blackhole_mss</literal></entry>
 963               <entry><acronym>MSS to try for IPv6</acronym></entry>
 964             </row>
 965           </tbody>
 966         </tgroup>
 967       </informaltable>
 968
 969       <para>New monitoring &man.sysctl.8;s haven been added:</para>
 970
 971       <informaltable frame="none" pgwide="0">
 972         <tgroup cols="2">
 973           <colspec colwidth="1*"/>
 974           <colspec colwidth="1*"/>
 975           <thead>
 976             <row>
 977               <entry>Tunable</entry>
 978               <entry>Description</entry>
 979             </row>
 980           </thead>
 981
 982           <tbody>
 983             <row>
 984               <entry><literal>net.inet.tcp.pmtud_blackhole_activated</literal></entry>
 985               <entry>Number of times the code was activated to attempt
 986                 downshifting the <acronym>MSS</acronym></entry>
 987             </row>
 988
 989             <row>
 990               <entry><literal>net.inet.tcp.pmtud_blackhole_min_activated</literal></entry>
 991               <entry>Number of times the blackhole
 992                 <acronym>MSS</acronym> was used in an attempt to
 993                 downshift</entry>
 994             </row>
 995
 996             <row>
 997               <entry><literal>net.inet.tcp.pmtud_blackhole_failed</literal></entry>
 998               <entry>Number of times that the blackhole failed to
 999                 connect after downshifting the
1000                 <acronym>MSS</acronym></entry>
1001             </row>
1002           </tbody>
1003         </tgroup>
1004       </informaltable>
1005     </sect2>
1006   </sect1>
1007
1008   <sect1 xml:id="ports">
1009     <title>Ports Collection and Package Infrastructure</title>
1010
1011     <para>This section covers changes to the &os;&nbsp;Ports
1012       Collection, package infrastructure, and package maintenance and
1013       installation tools.</para>
1014
1015     <sect2 xml:id="ports-infrastructure">
1016       <title>Infrastructure Changes</title>
1017
1018       <para>&nbsp;</para>
1019     </sect2>
1020
1021     <sect2 xml:id="ports-packages ">
1022       <title>Packaging Changes</title>
1023
1024       <para>&nbsp;</para>
1025     </sect2>
1026   </sect1>
1027
1028   <sect1 xml:id="doc">
1029     <title>Documentation</title>
1030
1031     <para>This section covers changes to the &os;&nbsp;Documentation
1032       Project sources and toolchain.</para>
1033
1034     <sect2 xml:id="doc-sources">
1035       <title>Documentation Source Changes</title>
1036
1037       <para>&nbsp;</para>
1038     </sect2>
1039
1040     <sect2 xml:id="doc-toolchain">
1041       <title>Documentation Toolchain Changes</title>
1042
1043       <para>&nbsp;</para>
1044     </sect2>
1045   </sect1>
1046
1047   <sect1 xml:id="releng">
1048     <title>Release Engineering and Integration</title>
1049
1050     <para>This section convers changes that are specific to the
1051       &os;&nbsp;Release Engineering processes.</para>
1052
1053     <sect2 xml:id="releng-changes">
1054       <title>Integration Changes</title>
1055
1056       <para revision="277458" contrib="sponsor" sponsor="&ff;">The
1057         Release Engineering build tools have been updated to include
1058         support for producing virtual machine disk images for various
1059         cloud hosting providers.</para>
1060
1061       <para revision="278926">The Release Engineering build tools have
1062         been updated to use multi-threaded &man.xz.1;.  By default,
1063         the number of &man.xz.1; threads is set to the number of cores
1064         available.</para>
1065     </sect2>
1066   </sect1>
1067 </article>