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

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   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;
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  11 <!ENTITY errata SYSTEM "../../share/xml/errata.xml">
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  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: 284813 -->
  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;.</para>
  98
  99     <para>Typical release note items document recent security
 100       advisories issued after &release.prev;, new drivers or hardware
 101       support, new commands or options, major bug fixes, or
 102       contributed software upgrades.  They may also list changes to
 103       major ports/packages or release engineering practices.  Clearly
 104       the release notes cannot list every single change made to &os;
 105       between releases; this document focuses primarily on security
 106       advisories, user-visible changes, and major architectural
 107       improvements.</para>
 108   </sect1>
 109
 110   <sect1 xml:id="upgrade">
 111     <title>Upgrading from Previous Releases of &os;</title>
 112
 113     <para arch="amd64,i386">Binary upgrades between RELEASE versions
 114       (and snapshots of the various security branches) are supported
 115       using the &man.freebsd-update.8; utility.  The binary upgrade
 116       procedure will update unmodified userland utilities, as well as
 117       unmodified <filename>GENERIC</filename> kernel distributed as
 118       a part of an official &os; release.  The &man.freebsd-update.8;
 119       utility requires that the host being upgraded have Internet
 120       connectivity.</para>
 121
 122     <para>Source-based upgrades (those based on recompiling the &os;
 123       base system from source code) from previous versions are
 124       supported, according to the instructions in
 125       <filename>/usr/src/UPDATING</filename>.</para>
 126
 127     <important>
 128       <para>Upgrading &os; should only be attempted after
 129         backing up <emphasis>all</emphasis> data and configuration
 130         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="276991">The &man.termcap.5; file is installed
 163         as-is from sources, instead of reordering, creating
 164         <filename>/etc/termcap.db</filename> by default, providing
 165         a performance improvements to applications that use the
 166         &man.termcap.5; database, such as &man.vi.1; and
 167         &man.ncurses.3;.</para>
 168     </sect2>
 169
 170     <sect2 xml:id="userland-programs">
 171       <title>Userland Application Changes</title>
 172
 173       <para revision="275040">A new utility, &man.dpv.1;, has been
 174         added to the base system, providing a &man.dialog.1;-style
 175         progress view from one or more input streams.  A corresponding
 176         library, &man.dpv.3;, has also been added.</para>
 177
 178       <para revision="275945">The &man.elfdump.1; utility has been
 179         updated to support capability mode provided by
 180         &man.capsicum.4;.</para>
 181
 182       <para revision="277434" contrib="sponsor" sponsor="&ff;">The
 183         &man.fstyp.8; utility has been added, which is used to
 184         determine the filesystem on a specified device.</para>
 185
 186       <para revision="278968" contrib="sponsor" sponsor="&ff;">The
 187         &man.mkimg.1; utility has been updated to support the
 188         <acronym>MBR</acronym> <acronym>EFI</acronym> partition
 189         type.</para>
 190
 191       <para revision="281044">A regression in the &man.libarchive.3;
 192         library that would prevent a directory from being included in
 193         the archive when <literal>--one-file-system</literal> is used
 194         has been fixed.</para>
 195
 196       <para revision="281161" contrib="sponsor"
 197         sponsor="&limelight;">A new flag, <literal>-R</literal>, has
 198         been added to the &man.netstat.8; utility, which is used to
 199         dump <acronym>RSS</acronym>/flow information.</para>
 200
 201       <para revision="281936" contrib="sponsor" sponsor="&ff;">The
 202         &man.ar.1; utility has been updated to set
 203         <literal>ARCHIVE_EXTRACT_SECURE_SYMLINKS</literal> and
 204         <literal>ARCHIVE_EXTRACT_SECURE_NODOTDOT</literal> to disallow
 205         directory traversal when extracting an archive, similar to
 206         &man.tar.1;.</para>
 207
 208       <para revision="282278">A race condition in &man.wc.1; that
 209         would cause final results to be sent to &man.stderr.4; when
 210         receiving the <literal>SIGINFO</literal> signal has been
 211         fixed.</para>
 212
 213       <para revision="282870" contrib="sponsor"
 214         sponsor="&scaleengine;">The &man.freebsd-update.8; utility has
 215         been updated to prevent fetching updated binary patches when
 216         a previous upgrade has not been thoroughly completed.</para>
 217
 218       <para revision="282974" contrib="sponsor" sponsor="&ff;">The
 219         &man.uefisign.8; utility has been added.</para>
 220
 221       <para revision="283875" contrib="sponsor"
 222         sponsor="&multiplay;">The &man.chflags.1;, &man.chgrp.1;,
 223         &man.chmod.1;, and &man.chown.8; utilities now affect symbolic
 224         links when the <literal>-R</literal> flag is specified, as
 225         documented in &man.symlink.7;.</para>
 226
 227       <para revision="283258">The &man.date.1; utility has been
 228         updated to print the modification time of the file passed as
 229         an argument to the <literal>-r</literal> flag, improving
 230         compatibility with the <acronym>GNU</acronym> &man.date.1;
 231         utility behavior.</para>
 232
 233       <para revision="284523">A new flag, <literal>-c</literal>, has
 234         been added to the &man.mkimg.1; utility, which allows
 235         specifying the capacity of the target disk image.</para>
 236
 237       <para revision="285092">The &man.pw.8; utility has been updated
 238         with a new flag, <literal>-R</literal>, that sets the root
 239         directory within which the utility will operate.</para>
 240     </sect2>
 241
 242     <sect2 xml:id="userland-contrib">
 243       <title>Contributed Software</title>
 244
 245       <para revision="282746" contrib="sponsor" sponsor="&ff;">The
 246         &man.resolvconf.8; utility has been updated to version
 247         3.7.0.</para>
 248
 249       <para revision="283270">The &man.nc.1; utility has been updated
 250         to the OpenBSD 5.7 version.</para>
 251
 252       <para revision="284398">Timezone data files have been updated to
 253         version 2015e.</para>
 254
 255       <para revision="284460">The &man.acpi.4; subsystem has been
 256         updated to version 20150515.</para>
 257
 258       <para revision="284778">The &man.file.1; utility has been
 259         updated to version 5.23.</para>
 260
 261       <para revision="285206">The &man.unbound.8; utility has been
 262         updated to version 1.5.3.</para>
 263
 264       <para revision="285305">The <application>sendmail</application>
 265         utility has been updated to version 8.15.2.</para>
 266
 267       <para revision="285330"><application>OpenSSL</application> has
 268         been updated to version 1.0.1p.</para>
 269
 270       <para revision="285612">The <application>ntp</application>
 271         suite has been updated to version 4.2.8p3.</para>
 272     </sect2>
 273
 274     <sect2 xml:id="userland-installer">
 275       <title>Installation and Configuration Tools</title>
 276
 277       <para revision="285769" contrib="sponsor"
 278         sponsor="&scaleengine;">Support for detecting and implementing
 279         a workaround for various laptops and motherboards that do not
 280         boot properly from <acronym>GPT</acronym>-partitioned disks
 281         has been added to &man.bsdinstall.8;.  Additionally, the
 282         <literal>active</literal> flag will be set on the partition
 283         when needed.</para>
 284
 285       <para revision="285769" contrib="sponsor"
 286         sponsor="&scaleengine;">Support for selecting the partitioning
 287         scheme when installing on the <acronym>UFS</acronym>
 288         filesystem has been added to &man.bsdinstall.8;.</para>
 289     </sect2>
 290
 291     <sect2 xml:id="userland-rc">
 292       <title><filename class="directory">/etc/rc.d</filename>
 293         Scripts</title>
 294
 295       <para revision="284009">A new &man.rc.8; script,
 296         <filename>growfs</filename>, has been added, which will resize
 297         the root filesystem on boot if <filename>/firstboot</filename>
 298         exists.</para>
 299     </sect2>
 300
 301     <sect2 xml:id="userland-periodic">
 302       <title><filename class="directory">/etc/periodic</filename>
 303         Scripts</title>
 304
 305       <para revision="277520" contrib="sponsor" sponsor="&ff;">A new
 306         &man.periodic.8; script,
 307         <filename>510.status-world-kernel</filename>, has been added,
 308         which evaluates the running userland and kernel versions from
 309         the &man.uname.1; <literal>-U</literal> and
 310         <literal>-K</literal> arguments, and prints an error if the
 311         system userland and kernel are not in sync.</para>
 312     </sect2>
 313
 314     <sect2 xml:id="userland-libraries">
 315       <title>Runtime Libraries and API</title>
 316
 317       <para revision="275040">A new file configuration library,
 318         &man.figpar.3;, has been added to the base system.</para>
 319
 320       <para revision="276686" contrib="sponsor" sponsor="&ff;">The
 321         &man.procctl.2; system call has been updated to include
 322         a facility for non-&man.init.8; processes to be declared as
 323         the reaper of child processes and their decendants.</para>
 324
 325       <para revision="280392">The &man.setmode.3; function has been
 326         updated to consistently set <literal>errno</literal> on
 327         failure.</para>
 328     </sect2>
 329
 330     <sect2 xml:id="userland-abi">
 331       <title>ABI Compatibility</title>
 332
 333       <para revision="275807">The &linux; compatibility version has
 334         been updated to <literal>2.6.18</literal>.  The
 335         <literal>compat.linux.osrelease</literal> &man.sysctl.8; is
 336         evaluated when building the <filename
 337           role="package">emulators/linux-c6</filename> and related
 338         ports.</para>
 339     </sect2>
 340   </sect1>
 341
 342   <sect1 xml:id="kernel">
 343     <title>Kernel</title>
 344
 345     <para>This section covers changes to kernel configurations, system
 346       tuning, and system control parameters that are not otherwise
 347       categorized.</para>
 348
 349     <sect2 xml:id="kernel-bugfix">
 350       <title>Kernel Bug Fixes</title>
 351
 352       <para revision="276068">A kernel panic triggered when destroying
 353         a &man.vnet.9; &man.jail.8; configured with &man.gif.4; has
 354         been fixed.</para>
 355
 356       <para revision="284018">A kernel panic triggered when destroying
 357         a &man.vnet.9; &man.jail.8; configured with &man.gre.4; has
 358         been fixed.</para>
 359     </sect2>
 360
 361     <sect2 xml:id="kernel-config">
 362       <title>Kernel Configuration</title>
 363
 364       <para revision="282065" contrib="sponsor" sponsor="&ff;">The
 365         <literal>PAE_TABLES</literal> kernel configuration option has
 366         been added for &os;/&arch.i386;, which instructs &man.pmap.9;
 367         to use <acronym>PAE</acronym> format for page tables while
 368         maintaining a 32-bit physical address size elsewhere in the
 369         kernel.  The use of this option can enhance application-level
 370         security by enabling the creation of <quote>no execute</quote>
 371         mappings on modern &arch.i386; processors.  Unlike the
 372         <literal>PAE</literal> option, <literal>PAE_TABLES</literal>
 373         preserves kernel binary interface (<acronym>KBI</acronym>)
 374         compatibility with non-<literal>PAE</literal> kernels,
 375         allowing non-<literal>PAE</literal> kernel modules and drivers
 376         to work with a <literal>PAE_TABLES</literal>-enabled kernel.
 377         Additionally, system limits are tuned for 4GB maximum
 378         <acronym>RAM</acronym>, avoiding kernel virtual address space
 379         (<acronym>KVA</acronym>) exhaustion.</para>
 380
 381       <para revision="282826">The <literal>SIFTR</literal> kernel
 382         configuration has been added, allowing building &man.siftr.4;
 383         statically into the kernel.</para>
 384
 385       <para revision="283076" contrib="sponsor" sponsor="&intelcorp;"
 386         arch="amd64,i386">The &man.nvd.4; and &man.nvme.4; drivers are
 387         now included in the <filename>GENERIC</filename> kernel
 388         configuration by default.</para>
 389
 390       <para revision="283505" arch="arm">The &arch.arm; boot loader,
 391         <filename>ubldr</filename>, is now relocatable.  In addition,
 392         <filename>ubldr.bin</filename> is now created during build
 393         time, which is a stripped binary with an entry point of
 394         <literal>0</literal>, providing the ability to specify the
 395         load address by running <literal>go
 396           &dollar;{loadaddr}</literal> in
 397         <literal>u-boot</literal>.</para>
 398
 399       <para revision="284094" arch="arm">A new module for creating
 400         <filename>rpi.dtb</filename> has been added for the Raspberry
 401         Pi.</para>
 402
 403       <para revision="284094" arch="arm">The
 404         <filename>rpi.dtb</filename> module is now installed to
 405         <filename class="directory">/boot/dtb/</filename> by
 406         default for the Raspberry Pi system.</para>
 407
 408       <para revision="284096" arch="arm">A new module for creating
 409         the <filename>dtb</filename> module for AM335x systems has
 410         been added.</para>
 411
 412       <para revision="284522" contrib="sponsor"
 413         sponsor="&limelight;">A new kernel configuration option,
 414         <literal>EM_MULTIQUEUE</literal>, has been added which enables
 415         multi-queue support in the &man.em.4; driver.</para>
 416
 417       <note>
 418         <para>Multi-queue support in the &man.em.4; driver is not
 419           officially supported by &intel;.</para>
 420       </note>
 421     </sect2>
 422
 423     <sect2 xml:id="kernel-sysctl">
 424       <title>System Tuning and Controls</title>
 425
 426       <para revision="276986">Throttling via <acronym>ACPI</acronym>
 427         and <acronym>P4TCC</acronym> via &man.device.hints.5; have
 428         been turned off by default.</para>
 429
 430       <para revision="278982" contrib="sponsor" sponsor="&ff;">The
 431         &man.hwpmc.4; default and maximum callchain depths have been
 432         increased.  The default has been increased from 16 to 32, and
 433         the maximum increased from 32 to 128.</para>
 434
 435       <para revision="281255" contrib="sponsor"
 436         sponsor="&ix;, &ff;">The &man.devfs.5; device filesystem has
 437         been changed to update timestamps for read/write operations
 438         using seconds precision.  A new &man.sysctl.8;,
 439         <literal>vfs.devfs.dotimes</literal> has been added, which
 440         when set to a non-zero value, enables default precision
 441         timestamps for these operations.</para>
 442
 443       <para revision="280632">The <literal>kern.osrelease</literal>
 444         and <literal>kern.osreldate</literal> are now configurable
 445         &man.jail.8; parameters.</para>
 446
 447       <para revision="284665" contrib="sponsor" sponsor="&ff;">A new
 448         &man.sysctl.8;, <literal>kern.racct.enable</literal>, has been
 449         added, which when set to a non-zero value allows using
 450         &man.rctl.8; with the <literal>GENERIC</literal> kernel.
 451         A new kernel configuration option,
 452         <literal>RACCT_DISABLED</literal> has also been added.</para>
 453
 454       <para revision="284665" contrib="sponsor" sponsor="&ff;">The
 455         <literal>GENERIC</literal> kernel configuration now includes
 456         <literal>RACCT</literal> and <literal>RCTL</literal> by
 457         default.</para>
 458
 459       <note>
 460         <para>To enable <literal>RACCT</literal> and
 461           <literal>RCTL</literal> on a system using the
 462           <literal>GENERIC</literal> kernel configuration, add
 463           <literal>kern.racct.enable=1</literal> to
 464           &man.loader.conf.5;, and reboot the system.</para>
 465       </note>
 466     </sect2>
 467   </sect1>
 468
 469   <sect1 xml:id="drivers">
 470     <title>Devices and Drivers</title>
 471
 472     <para>This section covers changes and additions to devices and
 473       device drivers since &release.prev;.</para>
 474
 475     <sect2 xml:id="drivers-device">
 476       <title>Device Drivers</title>
 477
 478       <para revision="282199">The <literal>drm</literal> code has
 479         been updated to match &linux; version 3.8.13.</para>
 480
 481       <para revision="281708">The &man.psm.4; driver has been updated
 482         to include improved support for newer Synaptics&nbsp;&reg;
 483         touchpads and the ClickPad&nbsp;&reg; mouse on newer
 484         Lenovo&nbsp;&trade; laptops.</para>
 485     </sect2>
 486
 487     <sect2 xml:id="drivers-storage">
 488       <title>Storage Drivers</title>
 489
 490       <para revision="281957">The &man.hptnr.4; driver has been
 491         updated to version 1.1.1.</para>
 492     </sect2>
 493
 494     <sect2 xml:id="drivers-network">
 495       <title>Network Drivers</title>
 496
 497       <para revision="274486">The &man.pfil.9; interface default hash
 498         has been changed from <literal>Jenkins</literal> to
 499         <literal>Murmur3</literal>, providing a 3-percent performance
 500         increase in packets-per-second.</para>
 501
 502       <para revision="279157">The &man.ral.4; driver has been updated
 503         to support the RT5390 and RT5392 chipsets.</para>
 504
 505       <para revision="284066" contrib="sponsor" sponsor="&yandex;">The
 506         &man.gre.4; driver has been significantly overhauled, and has
 507         been split into two separate modules, &man.gre.4; and
 508         &man.me.4;.</para>
 509
 510       <para revision="284365">The &man.vxlan.4; driver has been added,
 511         which creates a virtual Layer 2 (Ethernet) network overlaid in
 512         a Layer 3 (IP/UDP) network.  The &man.vxlan.4; driver is
 513         analogous to &man.vlan.4;, but is designed to be better suited
 514         for large, multiple-tenant datacenter environments.</para>
 515
 516       <para revision="284499">The &man.cdce.4; driver has been updated
 517         to include support for the RTL8153 chipset.</para>
 518
 519       <para revision="284555" contrib="sponsor"
 520         sponsor="&solarflare;">The &man.sfxge.4; driver has been
 521         updated to support Solarflare Flareon Ultra 7000-series
 522         chipsets.</para>
 523     </sect2>
 524   </sect1>
 525
 526   <sect1 xml:id="hardware">
 527     <title>Hardware Support</title>
 528
 529     <para>This section covers general hardware support for physical
 530       machines, hypervisors, and virtualization environments, as well
 531       as hardware changes and updates that do not otherwise fit in
 532       other sections of this document.</para>
 533
 534     <sect2 xml:id="hardware-support">
 535       <title>Hardware Support</title>
 536
 537       <para>&nbsp;</para>
 538     </sect2>
 539
 540     <sect2 xml:id="hardware-virtualization">
 541       <title>Virtualization Support</title>
 542
 543       <para revision="275273">The &man.virtio.console.4; driver has
 544         been added, which provides an interface to VirtIO console
 545         devices through a &man.tty.4; device.</para>
 546
 547       <para revision="276403">The &man.bhyve.8; hypervisor has been
 548         updated to support &amd; processors with
 549         <acronym>SVM</acronym> and <acronym>AMD-V</acronym> hardware
 550         extensions.</para>
 551
 552       <para revision="280370">The &man.bhyve.8; hypervisor has been
 553         updated to support <literal>DSM TRIM</literal> commands for
 554         virtual <acronym>AHCI</acronym> disks.</para>
 555
 556       <para revision="283280" contrib="sponsor" sponsor="&msostc;">The
 557         Hyper-V&trade; drivers have been updated with several
 558         enhancements:</para>
 559
 560       <itemizedlist>
 561         <listitem>
 562           <para>The &man.hv.vmbus.4; driver now has multi-channel
 563             support.</para>
 564         </listitem>
 565
 566         <listitem>
 567           <para>The &man.hv.storvsc.4; driver now has scatter/gather
 568             support, in addition to performance improvements.</para>
 569         </listitem>
 570
 571         <listitem>
 572           <para>The &man.hv.kvp.4; driver has received several bug
 573             fixes.</para>
 574         </listitem>
 575       </itemizedlist>
 576
 577       <para revision="285236" contrib="sponsor" sponsor="&msostc;">The
 578         &man.hv.netvsc.4; driver has been updated to support checksum
 579         offloading and <acronym>TSO</acronym>.</para>
 580     </sect2>
 581
 582     <sect2 xml:id="hardware-arm">
 583       <title>ARM Support</title>
 584
 585       <para revision="278079" arch="arm">Support to turn off the
 586         BeagleBone Black system with the &man.shutdown.8;
 587         <literal>-p</literal> flag or by invoking &man.poweroff.8; has
 588         been added.</para>
 589
 590       <para revision="278599" arch="arm">Support for the Exynos 5420
 591         Octa system has been added.</para>
 592
 593       <para revision="278599" arch="arm">The <acronym>SMP</acronym>
 594         option has been enabled for all Exynos 5 systems supported by
 595         &os;.</para>
 596
 597       <para revision="278608">The <literal>bcm2835_cpufreq</literal>
 598         driver has been added, which supports <acronym>CPU</acronym>
 599         frequency and voltage control on the Raspberry Pi
 600         <acronym>SOC</acronym>.</para>
 601
 602       <para revision="283500" arch="arm">Support for the Toradex
 603         Apalis i.MX6 development board has been added.</para>
 604
 605       <para revision="283500" arch="arm">Audio transmission drivers
 606         have been added for Digital Audio Multiplexer
 607         (<acronym>AUDMUXM</acronym>), Smart Direct Memory Access
 608         Controller (<acronym>SDMA</acronym>), and Syncronous Serial
 609         Interface (<acronym>SSI</acronym>).</para>
 610     </sect2>
 611   </sect1>
 612
 613   <sect1 xml:id="storage">
 614     <title>Storage</title>
 615
 616     <para>This section covers changes and additions to file systems
 617       and other storage subsystems, both local and networked.</para>
 618
 619     <sect2 xml:id="storage-general">
 620       <title>General Storage</title>
 621
 622       <para revision="279002" contrib="sponsor" sponsor="&ix;">The
 623         &man.ctl.4; <acronym>LUN</acronym> mapping has been rewritten,
 624         replacing <acronym>iSCSI</acronym>-specific mapping mechanisms
 625         with a new mechanism that works for any port.</para>
 626
 627       <para revision="279055" contrib="sponsor" sponsor="&ix;">The
 628         &man.ctld.8; utility has been updated to allow controlling
 629         non-<acronym>iSCSI</acronym> &man.ctl.4; ports.</para>
 630
 631       <para revision="283223" contrib="sponsor" sponsor="&ff;">The
 632         &man.autofs.5; subsystem has been updated to include a new
 633         &man.auto.master.5; map, <literal>-media</literal>, which
 634         allows automatically mounting removable media, such as
 635         <acronym>CD</acronym> drives or <acronym>USB</acronym> flash
 636         drives.</para>
 637
 638       <para revision="283242" contrib="sponsor" sponsor="&ff;">The
 639         &man.autofs.5; subsystem has been updated to include a new
 640         &man.auto.master.5; map, <literal>-noauto</literal>, which
 641         handles &man.fstab.5; entries set to
 642         <literal>noauto</literal>.</para>
 643     </sect2>
 644
 645     <sect2 xml:id="storage-net">
 646       <title>Networked Storage</title>
 647
 648       <para revision="274939" contrib="sponsor" sponsor="&ix;">The
 649         &man.ctld.8; utility has been updated to include support for
 650         registering <acronym>iSCSI</acronym> targets and portals on
 651         <acronym>iSNS</acronym> servers.  This provides a mechanism
 652         which allows <acronym>iSCSI</acronym> initiators to find
 653         targets and portals without requiring active
 654         discovery.</para>
 655
 656       <para revision="275249" contrib="sponsor" sponsor="&ff;">Support
 657         for the <literal>timeo</literal>, <literal>actimeo</literal>,
 658         <literal>noac</literal>, and <literal>proto</literal> options
 659         have been added to &man.mount.nfs.8;.</para>
 660     </sect2>
 661
 662     <sect2 xml:id="storage-zfs">
 663       <title>ZFS</title>
 664
 665       <para revision="275490">A new tunable,
 666         <literal>vfs.zfs.spa_slop_shift</literal>, has been added,
 667         which controls how much space is reserved by default.</para>
 668
 669       <para revision="277583">The <literal>arc_meta_limit</literal>
 670         statistics are now visible through the
 671         <literal>kstat</literal> &man.sysctl.8;.  As a result of this
 672         change, the <literal>vfs.zfs.arc_meta_used</literal>
 673         &man.sysctl.8; has been removed, and replaced with the
 674         <literal>kstat.zfs.misc.arcstats.arc_meta_used</literal>
 675         &man.sysctl.8;.</para>
 676     </sect2>
 677
 678     <sect2 xml:id="storage-geom">
 679       <title>&man.geom.4;</title>
 680
 681       <para revision="275891" contrib="sponsor" sponsor="&ix;">The
 682         &man.ctl.4; subsystem has been updated, increasing the ports
 683         limit from <literal>128</literal> to <literal>256</literal>,
 684         and <acronym>LUN</acronym> limit from <literal>256</literal>
 685         to <literal>1024</literal>.</para>
 686
 687       <para revision="282861">Support for the
 688         <literal>apple-boot</literal>, <literal>apple-hfs</literal>,
 689         and <literal>apple-ufs</literal> <acronym>MBR</acronym>
 690         partitioning schemes have been added to &man.gpart.8;.</para>
 691     </sect2>
 692   </sect1>
 693
 694   <sect1 xml:id="boot">
 695     <title>Boot Loader Changes</title>
 696
 697     <para>This section covers the boot loader, boot menu, and other
 698       boot-related changes.</para>
 699
 700     <sect2 xml:id="boot-loader">
 701       <title>Boot Loader Changes</title>
 702
 703       <para revision="281323">Support for <literal>bzipfs</literal>
 704         has been added to the <acronym>EFI</acronym> loader.</para>
 705
 706       <para revision="281843">The boot loader has been updated to
 707         support entering the <acronym>GELI</acronym> passphrase before
 708         loading the kernel.  To enable this behavior, add
 709         <literal>geom_eli_passphrase_prompt="YES"</literal> to
 710         &man.loader.conf.5;.</para>
 711
 712       <para revision="283262" contrib="sponsor" sponsor="&ff;">The
 713         memory test run at boot time on &os;/&arch.amd64; platforms
 714         has been disabled by default.</para>
 715
 716       <para revision="283972">A new &man.ttys.5; class,
 717         <literal>3wire</literal>, has been added.  This is similar to
 718         the existing terminal classes, but does not have a defined
 719         baudrate.</para>
 720
 721       <para revision="284775" contrib="sponsor" sponsor="&ff;"
 722         arch="arm">The &man.ttys.5; file for &os;/&arch.arm; has been
 723         updated to enable <filename>ttyu1</filename>,
 724         <filename>ttyu2</filename>, and <filename>ttyu3</filename> by
 725         default, if the callin port is an active console port.</para>
 726     </sect2>
 727
 728     <sect2 xml:id="boot-menu">
 729       <title>Boot Menu Changes</title>
 730
 731       <para>&nbsp;</para>
 732     </sect2>
 733   </sect1>
 734
 735   <sect1 xml:id="network">
 736     <title>Networking</title>
 737
 738     <para>This section describes changes that affect networking in
 739       &os;.</para>
 740
 741     <sect2 xml:id="network-protocols">
 742       <title>Network Procols</title>
 743
 744       <para revision="273838" contrib="sponsor"
 745         sponsor="&limelight;">Support for <acronym>PLPMTUD</acronym>
 746         blackhole detection (<acronym>RFC</acronym> 4821) has been
 747         added to the &man.tcp.4; stack, disabled by default.  New
 748         control tunables have been added:</para>
 749
 750       <informaltable frame="none" pgwide="0">
 751         <tgroup cols="2">
 752           <colspec colwidth="1*"/>
 753           <colspec colwidth="1*"/>
 754           <thead>
 755             <row>
 756               <entry>Tunable</entry>
 757               <entry>Description</entry>
 758             </row>
 759           </thead>
 760
 761           <tbody>
 762             <row>
 763               <entry><literal>net.inet.tcp.pmtud_blackhole_detection</literal></entry>
 764               <entry>Enables or disables <acronym>PLPMTUD</acronym>
 765                 blackhole detection</entry>
 766             </row>
 767
 768             <row>
 769               <entry><literal>net.inet.tcp.pmtud_blackhole_mss</literal></entry>
 770               <entry><acronym>MSS</acronym> to try for IPv4</entry>
 771             </row>
 772
 773             <row>
 774               <entry><literal>net.inet.tcp.v6pmtud_blackhole_mss</literal></entry>
 775               <entry><acronym>MSS to try for IPv6</acronym></entry>
 776             </row>
 777           </tbody>
 778         </tgroup>
 779       </informaltable>
 780
 781       <para>New monitoring &man.sysctl.8;s haven been added:</para>
 782
 783       <informaltable frame="none" pgwide="0">
 784         <tgroup cols="2">
 785           <colspec colwidth="1*"/>
 786           <colspec colwidth="1*"/>
 787           <thead>
 788             <row>
 789               <entry>Tunable</entry>
 790               <entry>Description</entry>
 791             </row>
 792           </thead>
 793
 794           <tbody>
 795             <row>
 796               <entry><literal>net.inet.tcp.pmtud_blackhole_activated</literal></entry>
 797               <entry>Number of times the code was activated to attempt
 798                 downshifting the <acronym>MSS</acronym></entry>
 799             </row>
 800
 801             <row>
 802               <entry><literal>net.inet.tcp.pmtud_blackhole_min_activated</literal></entry>
 803               <entry>Number of times the blackhole
 804                 <acronym>MSS</acronym> was used in an attempt to
 805                 downshift</entry>
 806             </row>
 807
 808             <row>
 809               <entry><literal>net.inet.tcp.pmtud_blackhole_failed</literal></entry>
 810               <entry>Number of times that the blackhole failed to
 811                 connect after downshifting the
 812                 <acronym>MSS</acronym></entry>
 813             </row>
 814           </tbody>
 815         </tgroup>
 816       </informaltable>
 817
 818     </sect2>
 819   </sect1>
 820
 821   <sect1 xml:id="ports">
 822     <title>Ports Collection and Package Infrastructure</title>
 823
 824     <para>This section covers changes to the &os;&nbsp;Ports
 825       Collection, package infrastructure, and package maintenance and
 826       installation tools.</para>
 827
 828     <sect2 xml:id="ports-infrastructure">
 829       <title>Infrastructure Changes</title>
 830
 831       <para>&nbsp;</para>
 832     </sect2>
 833
 834     <sect2 xml:id="ports-packages ">
 835       <title>Packaging Changes</title>
 836
 837       <para>&nbsp;</para>
 838     </sect2>
 839   </sect1>
 840
 841   <sect1 xml:id="doc">
 842     <title>Documentation</title>
 843
 844     <para>This section covers changes to the &os;&nbsp;Documentation
 845       Project sources and toolchain.</para>
 846
 847     <sect2 xml:id="doc-sources">
 848       <title>Documentation Source Changes</title>
 849
 850       <para>&nbsp;</para>
 851     </sect2>
 852
 853     <sect2 xml:id="doc-toolchain">
 854       <title>Documentation Toolchain Changes</title>
 855
 856       <para>&nbsp;</para>
 857     </sect2>
 858   </sect1>
 859
 860   <sect1 xml:id="releng">
 861     <title>Release Engineering and Integration</title>
 862
 863     <para>This section convers changes that are specific to the
 864       &os;&nbsp;Release Engineering processes.</para>
 865
 866     <sect2 xml:id="releng-changes">
 867       <title>Integration Changes</title>
 868
 869       <para revision="283161" contrib="sponsor" sponsor="&ff;">The
 870         Release Engineering build tools have been updated to support
 871         building &os;/&arch.arm; images without external utilities for
 872         supported boards where a corresponding
 873         <literal>u-boot</literal> port exists in the Ports
 874         Collection.</para>
 875
 876       <para revision="283548" contrib="sponsor" sponsor="&ff;">The
 877         &os;/&arch.i386; memory stick installation images are now
 878         created using the &man.mkimg.1; utility, matching the way
 879         the &os;/&arch.amd64; images are created.</para>
 880     </sect2>
 881   </sect1>
 882 </article>