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
 273       <para revision="285750" contrib="sponsor" sponsor="&dell;">The
 274         &man.ssh.1; utility has been updated to re-implement hostname
 275         canonicalization before locating the host in
 276         <filename>known_hosts</filename>.</para>
 277     </sect2>
 278
 279     <sect2 xml:id="userland-installer">
 280       <title>Installation and Configuration Tools</title>
 281
 282       <para revision="285769" contrib="sponsor"
 283         sponsor="&scaleengine;">Support for detecting and implementing
 284         a workaround for various laptops and motherboards that do not
 285         boot properly from <acronym>GPT</acronym>-partitioned disks
 286         has been added to &man.bsdinstall.8;.  Additionally, the
 287         <literal>active</literal> flag will be set on the partition
 288         when needed.</para>
 289
 290       <para revision="285721" contrib="sponsor"
 291         sponsor="&scaleengine;">Support for detecting and implementing
 292         aligning partitions on 1Mb boundaries has been added to
 293         &man.bsdinstall.8;.</para>
 294
 295       <para revision="285769" contrib="sponsor"
 296         sponsor="&scaleengine;">Support for selecting the partitioning
 297         scheme when installing on the <acronym>UFS</acronym>
 298         filesystem has been added to &man.bsdinstall.8;.</para>
 299     </sect2>
 300
 301     <sect2 xml:id="userland-rc">
 302       <title><filename class="directory">/etc/rc.d</filename>
 303         Scripts</title>
 304
 305       <para revision="284009">A new &man.rc.8; script,
 306         <filename>growfs</filename>, has been added, which will resize
 307         the root filesystem on boot if <filename>/firstboot</filename>
 308         exists.</para>
 309     </sect2>
 310
 311     <sect2 xml:id="userland-periodic">
 312       <title><filename class="directory">/etc/periodic</filename>
 313         Scripts</title>
 314
 315       <para revision="277520" contrib="sponsor" sponsor="&ff;">A new
 316         &man.periodic.8; script,
 317         <filename>510.status-world-kernel</filename>, has been added,
 318         which evaluates the running userland and kernel versions from
 319         the &man.uname.1; <literal>-U</literal> and
 320         <literal>-K</literal> arguments, and prints an error if the
 321         system userland and kernel are not in sync.</para>
 322     </sect2>
 323
 324     <sect2 xml:id="userland-libraries">
 325       <title>Runtime Libraries and API</title>
 326
 327       <para revision="275040">A new file configuration library,
 328         &man.figpar.3;, has been added to the base system.</para>
 329
 330       <para revision="276686" contrib="sponsor" sponsor="&ff;">The
 331         &man.procctl.2; system call has been updated to include
 332         a facility for non-&man.init.8; processes to be declared as
 333         the reaper of child processes and their decendants.</para>
 334
 335       <para revision="280392">The &man.setmode.3; function has been
 336         updated to consistently set <literal>errno</literal> on
 337         failure.</para>
 338     </sect2>
 339
 340     <sect2 xml:id="userland-abi">
 341       <title>ABI Compatibility</title>
 342
 343       <para revision="275807">The &linux; compatibility version has
 344         been updated to <literal>2.6.18</literal>.  The
 345         <literal>compat.linux.osrelease</literal> &man.sysctl.8; is
 346         evaluated when building the <filename
 347           role="package">emulators/linux-c6</filename> and related
 348         ports.</para>
 349     </sect2>
 350   </sect1>
 351
 352   <sect1 xml:id="kernel">
 353     <title>Kernel</title>
 354
 355     <para>This section covers changes to kernel configurations, system
 356       tuning, and system control parameters that are not otherwise
 357       categorized.</para>
 358
 359     <sect2 xml:id="kernel-bugfix">
 360       <title>Kernel Bug Fixes</title>
 361
 362       <para revision="276068">A kernel panic triggered when destroying
 363         a &man.vnet.9; &man.jail.8; configured with &man.gif.4; has
 364         been fixed.</para>
 365
 366       <para revision="284018">A kernel panic triggered when destroying
 367         a &man.vnet.9; &man.jail.8; configured with &man.gre.4; has
 368         been fixed.</para>
 369     </sect2>
 370
 371     <sect2 xml:id="kernel-config">
 372       <title>Kernel Configuration</title>
 373
 374       <para revision="282065" contrib="sponsor" sponsor="&ff;">The
 375         <literal>PAE_TABLES</literal> kernel configuration option has
 376         been added for &os;/&arch.i386;, which instructs &man.pmap.9;
 377         to use <acronym>PAE</acronym> format for page tables while
 378         maintaining a 32-bit physical address size elsewhere in the
 379         kernel.  The use of this option can enhance application-level
 380         security by enabling the creation of <quote>no execute</quote>
 381         mappings on modern &arch.i386; processors.  Unlike the
 382         <literal>PAE</literal> option, <literal>PAE_TABLES</literal>
 383         preserves kernel binary interface (<acronym>KBI</acronym>)
 384         compatibility with non-<literal>PAE</literal> kernels,
 385         allowing non-<literal>PAE</literal> kernel modules and drivers
 386         to work with a <literal>PAE_TABLES</literal>-enabled kernel.
 387         Additionally, system limits are tuned for 4GB maximum
 388         <acronym>RAM</acronym>, avoiding kernel virtual address space
 389         (<acronym>KVA</acronym>) exhaustion.</para>
 390
 391       <para revision="282826">The <literal>SIFTR</literal> kernel
 392         configuration has been added, allowing building &man.siftr.4;
 393         statically into the kernel.</para>
 394
 395       <para revision="283076" contrib="sponsor" sponsor="&intelcorp;"
 396         arch="amd64,i386">The &man.nvd.4; and &man.nvme.4; drivers are
 397         now included in the <filename>GENERIC</filename> kernel
 398         configuration by default.</para>
 399
 400       <para revision="283505" arch="arm">The &arch.arm; boot loader,
 401         <filename>ubldr</filename>, is now relocatable.  In addition,
 402         <filename>ubldr.bin</filename> is now created during build
 403         time, which is a stripped binary with an entry point of
 404         <literal>0</literal>, providing the ability to specify the
 405         load address by running <literal>go
 406           &dollar;{loadaddr}</literal> in
 407         <literal>u-boot</literal>.</para>
 408
 409       <para revision="284094" arch="arm">A new module for creating
 410         <filename>rpi.dtb</filename> has been added for the Raspberry
 411         Pi.</para>
 412
 413       <para revision="284094" arch="arm">The
 414         <filename>rpi.dtb</filename> module is now installed to
 415         <filename class="directory">/boot/dtb/</filename> by
 416         default for the Raspberry Pi system.</para>
 417
 418       <para revision="284096" arch="arm">A new module for creating
 419         the <filename>dtb</filename> module for AM335x systems has
 420         been added.</para>
 421
 422       <para revision="284522" contrib="sponsor"
 423         sponsor="&limelight;">A new kernel configuration option,
 424         <literal>EM_MULTIQUEUE</literal>, has been added which enables
 425         multi-queue support in the &man.em.4; driver.</para>
 426
 427       <note>
 428         <para>Multi-queue support in the &man.em.4; driver is not
 429           officially supported by &intel;.</para>
 430       </note>
 431     </sect2>
 432
 433     <sect2 xml:id="kernel-sysctl">
 434       <title>System Tuning and Controls</title>
 435
 436       <para revision="276986">Throttling via <acronym>ACPI</acronym>
 437         and <acronym>P4TCC</acronym> via &man.device.hints.5; have
 438         been turned off by default.</para>
 439
 440       <para revision="278982" contrib="sponsor" sponsor="&ff;">The
 441         &man.hwpmc.4; default and maximum callchain depths have been
 442         increased.  The default has been increased from 16 to 32, and
 443         the maximum increased from 32 to 128.</para>
 444
 445       <para revision="281255" contrib="sponsor"
 446         sponsor="&ix;, &ff;">The &man.devfs.5; device filesystem has
 447         been changed to update timestamps for read/write operations
 448         using seconds precision.  A new &man.sysctl.8;,
 449         <literal>vfs.devfs.dotimes</literal> has been added, which
 450         when set to a non-zero value, enables default precision
 451         timestamps for these operations.</para>
 452
 453       <para revision="280632">The <literal>kern.osrelease</literal>
 454         and <literal>kern.osreldate</literal> are now configurable
 455         &man.jail.8; parameters.</para>
 456
 457       <para revision="284665" contrib="sponsor" sponsor="&ff;">A new
 458         &man.sysctl.8;, <literal>kern.racct.enable</literal>, has been
 459         added, which when set to a non-zero value allows using
 460         &man.rctl.8; with the <literal>GENERIC</literal> kernel.
 461         A new kernel configuration option,
 462         <literal>RACCT_DISABLED</literal> has also been added.</para>
 463
 464       <para revision="284665" contrib="sponsor" sponsor="&ff;">The
 465         <literal>GENERIC</literal> kernel configuration now includes
 466         <literal>RACCT</literal> and <literal>RCTL</literal> by
 467         default.</para>
 468
 469       <note>
 470         <para>To enable <literal>RACCT</literal> and
 471           <literal>RCTL</literal> on a system using the
 472           <literal>GENERIC</literal> kernel configuration, add
 473           <literal>kern.racct.enable=1</literal> to
 474           &man.loader.conf.5;, and reboot the system.</para>
 475       </note>
 476     </sect2>
 477   </sect1>
 478
 479   <sect1 xml:id="drivers">
 480     <title>Devices and Drivers</title>
 481
 482     <para>This section covers changes and additions to devices and
 483       device drivers since &release.prev;.</para>
 484
 485     <sect2 xml:id="drivers-device">
 486       <title>Device Drivers</title>
 487
 488       <para revision="282199">The <literal>drm</literal> code has
 489         been updated to match &linux; version 3.8.13.</para>
 490
 491       <para revision="281708">The &man.psm.4; driver has been updated
 492         to include improved support for newer Synaptics&nbsp;&reg;
 493         touchpads and the ClickPad&nbsp;&reg; mouse on newer
 494         Lenovo&nbsp;&trade; laptops.</para>
 495     </sect2>
 496
 497     <sect2 xml:id="drivers-storage">
 498       <title>Storage Drivers</title>
 499
 500       <para revision="281957">The &man.hptnr.4; driver has been
 501         updated to version 1.1.1.</para>
 502     </sect2>
 503
 504     <sect2 xml:id="drivers-network">
 505       <title>Network Drivers</title>
 506
 507       <para revision="274486">The &man.pf.4; interface default hash
 508         has been changed from <literal>Jenkins</literal> to
 509         <literal>Murmur3</literal>, providing a 3-percent performance
 510         increase in packets-per-second.</para>
 511
 512       <para revision="279157">The &man.ral.4; driver has been updated
 513         to support the RT5390 and RT5392 chipsets.</para>
 514
 515       <para revision="284066" contrib="sponsor" sponsor="&yandex;">The
 516         &man.gre.4; driver has been significantly overhauled, and has
 517         been split into two separate modules, &man.gre.4; and
 518         &man.me.4;.</para>
 519
 520       <para revision="284365">The &man.vxlan.4; driver has been added,
 521         which creates a virtual Layer 2 (Ethernet) network overlaid in
 522         a Layer 3 (IP/UDP) network.  The &man.vxlan.4; driver is
 523         analogous to &man.vlan.4;, but is designed to be better suited
 524         for large, multiple-tenant datacenter environments.</para>
 525
 526       <para revision="284499">The &man.cdce.4; driver has been updated
 527         to include support for the RTL8153 chipset.</para>
 528
 529       <para revision="284555" contrib="sponsor"
 530         sponsor="&solarflare;">The &man.sfxge.4; driver has been
 531         updated to support Solarflare Flareon Ultra 7000-series
 532         chipsets.</para>
 533     </sect2>
 534   </sect1>
 535
 536   <sect1 xml:id="hardware">
 537     <title>Hardware Support</title>
 538
 539     <para>This section covers general hardware support for physical
 540       machines, hypervisors, and virtualization environments, as well
 541       as hardware changes and updates that do not otherwise fit in
 542       other sections of this document.</para>
 543
 544     <sect2 xml:id="hardware-support">
 545       <title>Hardware Support</title>
 546
 547       <para>&nbsp;</para>
 548     </sect2>
 549
 550     <sect2 xml:id="hardware-virtualization">
 551       <title>Virtualization Support</title>
 552
 553       <para revision="275273">The &man.virtio.console.4; driver has
 554         been added, which provides an interface to VirtIO console
 555         devices through a &man.tty.4; device.</para>
 556
 557       <para revision="276403">The &man.bhyve.8; hypervisor has been
 558         updated to support &amd; processors with
 559         <acronym>SVM</acronym> and <acronym>AMD-V</acronym> hardware
 560         extensions.</para>
 561
 562       <para revision="280370">The &man.bhyve.8; hypervisor has been
 563         updated to support <literal>DSM TRIM</literal> commands for
 564         virtual <acronym>AHCI</acronym> disks.</para>
 565
 566       <para revision="283280" contrib="sponsor" sponsor="&msostc;">The
 567         Hyper-V&trade; drivers have been updated with several
 568         enhancements:</para>
 569
 570       <itemizedlist>
 571         <listitem>
 572           <para>The &man.hv.vmbus.4; driver now has multi-channel
 573             support.</para>
 574         </listitem>
 575
 576         <listitem>
 577           <para>The &man.hv.storvsc.4; driver now has scatter/gather
 578             support, in addition to performance improvements.</para>
 579         </listitem>
 580
 581         <listitem>
 582           <para>The &man.hv.kvp.4; driver has received several bug
 583             fixes.</para>
 584         </listitem>
 585       </itemizedlist>
 586
 587       <para revision="285236" contrib="sponsor" sponsor="&msostc;">The
 588         &man.hv.netvsc.4; driver has been updated to support checksum
 589         offloading and <acronym>TSO</acronym>.</para>
 590     </sect2>
 591
 592     <sect2 xml:id="hardware-arm">
 593       <title>ARM Support</title>
 594
 595       <para revision="278079" arch="arm">Support to turn off the
 596         BeagleBone Black system with the &man.shutdown.8;
 597         <literal>-p</literal> flag or by invoking &man.poweroff.8; has
 598         been added.</para>
 599
 600       <para revision="278599" arch="arm">Support for the Exynos 5420
 601         Octa system has been added.</para>
 602
 603       <para revision="278599" arch="arm">The <acronym>SMP</acronym>
 604         option has been enabled for all Exynos 5 systems supported by
 605         &os;.</para>
 606
 607       <para revision="278608">The <literal>bcm2835_cpufreq</literal>
 608         driver has been added, which supports <acronym>CPU</acronym>
 609         frequency and voltage control on the Raspberry Pi
 610         <acronym>SOC</acronym>.</para>
 611
 612       <para revision="283500" arch="arm">Support for the Toradex
 613         Apalis i.MX6 development board has been added.</para>
 614
 615       <para revision="283500" arch="arm">Audio transmission drivers
 616         have been added for Digital Audio Multiplexer
 617         (<acronym>AUDMUXM</acronym>), Smart Direct Memory Access
 618         Controller (<acronym>SDMA</acronym>), and Syncronous Serial
 619         Interface (<acronym>SSI</acronym>).</para>
 620     </sect2>
 621   </sect1>
 622
 623   <sect1 xml:id="storage">
 624     <title>Storage</title>
 625
 626     <para>This section covers changes and additions to file systems
 627       and other storage subsystems, both local and networked.</para>
 628
 629     <sect2 xml:id="storage-general">
 630       <title>General Storage</title>
 631
 632       <para revision="279002" contrib="sponsor" sponsor="&ix;">The
 633         &man.ctl.4; <acronym>LUN</acronym> mapping has been rewritten,
 634         replacing <acronym>iSCSI</acronym>-specific mapping mechanisms
 635         with a new mechanism that works for any port.</para>
 636
 637       <para revision="279055" contrib="sponsor" sponsor="&ix;">The
 638         &man.ctld.8; utility has been updated to allow controlling
 639         non-<acronym>iSCSI</acronym> &man.ctl.4; ports.</para>
 640
 641       <para revision="283223" contrib="sponsor" sponsor="&ff;">The
 642         &man.autofs.5; subsystem has been updated to include a new
 643         &man.auto.master.5; map, <literal>-media</literal>, which
 644         allows automatically mounting removable media, such as
 645         <acronym>CD</acronym> drives or <acronym>USB</acronym> flash
 646         drives.</para>
 647
 648       <para revision="283242" contrib="sponsor" sponsor="&ff;">The
 649         &man.autofs.5; subsystem has been updated to include a new
 650         &man.auto.master.5; map, <literal>-noauto</literal>, which
 651         handles &man.fstab.5; entries set to
 652         <literal>noauto</literal>.</para>
 653     </sect2>
 654
 655     <sect2 xml:id="storage-net">
 656       <title>Networked Storage</title>
 657
 658       <para revision="274939" contrib="sponsor" sponsor="&ix;">The
 659         &man.ctld.8; utility has been updated to include support for
 660         registering <acronym>iSCSI</acronym> targets and portals on
 661         <acronym>iSNS</acronym> servers.  This provides a mechanism
 662         which allows <acronym>iSCSI</acronym> initiators to find
 663         targets and portals without requiring active
 664         discovery.</para>
 665
 666       <para revision="275249" contrib="sponsor" sponsor="&ff;">Support
 667         for the <literal>timeo</literal>, <literal>actimeo</literal>,
 668         <literal>noac</literal>, and <literal>proto</literal> options
 669         have been added to &man.mount.nfs.8;.</para>
 670     </sect2>
 671
 672     <sect2 xml:id="storage-zfs">
 673       <title>ZFS</title>
 674
 675       <para revision="275490">A new tunable,
 676         <literal>vfs.zfs.spa_slop_shift</literal>, has been added,
 677         which controls how much space is reserved by default.</para>
 678
 679       <para revision="277583">The <literal>arc_meta_limit</literal>
 680         statistics are now visible through the
 681         <literal>kstat</literal> &man.sysctl.8;.  As a result of this
 682         change, the <literal>vfs.zfs.arc_meta_used</literal>
 683         &man.sysctl.8; has been removed, and replaced with the
 684         <literal>kstat.zfs.misc.arcstats.arc_meta_used</literal>
 685         &man.sysctl.8;.</para>
 686     </sect2>
 687
 688     <sect2 xml:id="storage-geom">
 689       <title>&man.geom.4;</title>
 690
 691       <para revision="275891" contrib="sponsor" sponsor="&ix;">The
 692         &man.ctl.4; subsystem has been updated, increasing the ports
 693         limit from <literal>128</literal> to <literal>256</literal>,
 694         and <acronym>LUN</acronym> limit from <literal>256</literal>
 695         to <literal>1024</literal>.</para>
 696
 697       <para revision="282861">Support for the
 698         <literal>apple-boot</literal>, <literal>apple-hfs</literal>,
 699         and <literal>apple-ufs</literal> <acronym>MBR</acronym>
 700         partitioning schemes have been added to &man.gpart.8;.</para>
 701     </sect2>
 702   </sect1>
 703
 704   <sect1 xml:id="boot">
 705     <title>Boot Loader Changes</title>
 706
 707     <para>This section covers the boot loader, boot menu, and other
 708       boot-related changes.</para>
 709
 710     <sect2 xml:id="boot-loader">
 711       <title>Boot Loader Changes</title>
 712
 713       <para revision="281323">Support for <literal>bzipfs</literal>
 714         has been added to the <acronym>EFI</acronym> loader.</para>
 715
 716       <para revision="281843">The boot loader has been updated to
 717         support entering the <acronym>GELI</acronym> passphrase before
 718         loading the kernel.  To enable this behavior, add
 719         <literal>geom_eli_passphrase_prompt="YES"</literal> to
 720         &man.loader.conf.5;.</para>
 721
 722       <para revision="283262" contrib="sponsor" sponsor="&ff;">The
 723         memory test run at boot time on &os;/&arch.amd64; platforms
 724         has been disabled by default.</para>
 725
 726       <para revision="283972">A new &man.ttys.5; class,
 727         <literal>3wire</literal>, has been added.  This is similar to
 728         the existing terminal classes, but does not have a defined
 729         baudrate.</para>
 730
 731       <para revision="284775" contrib="sponsor" sponsor="&ff;"
 732         arch="arm">The &man.ttys.5; file for &os;/&arch.arm; has been
 733         updated to enable <filename>ttyu1</filename>,
 734         <filename>ttyu2</filename>, and <filename>ttyu3</filename> by
 735         default, if the callin port is an active console port.</para>
 736     </sect2>
 737
 738     <sect2 xml:id="boot-menu">
 739       <title>Boot Menu Changes</title>
 740
 741       <para>&nbsp;</para>
 742     </sect2>
 743   </sect1>
 744
 745   <sect1 xml:id="network">
 746     <title>Networking</title>
 747
 748     <para>This section describes changes that affect networking in
 749       &os;.</para>
 750
 751     <sect2 xml:id="network-protocols">
 752       <title>Network Procols</title>
 753
 754       <para revision="273838" contrib="sponsor"
 755         sponsor="&limelight;">Support for <acronym>PLPMTUD</acronym>
 756         blackhole detection (<acronym>RFC</acronym> 4821) has been
 757         added to the &man.tcp.4; stack, disabled by default.  New
 758         control tunables have been added:</para>
 759
 760       <informaltable frame="none" pgwide="0">
 761         <tgroup cols="2">
 762           <colspec colwidth="1*"/>
 763           <colspec colwidth="1*"/>
 764           <thead>
 765             <row>
 766               <entry>Tunable</entry>
 767               <entry>Description</entry>
 768             </row>
 769           </thead>
 770
 771           <tbody>
 772             <row>
 773               <entry><literal>net.inet.tcp.pmtud_blackhole_detection</literal></entry>
 774               <entry>Enables or disables <acronym>PLPMTUD</acronym>
 775                 blackhole detection</entry>
 776             </row>
 777
 778             <row>
 779               <entry><literal>net.inet.tcp.pmtud_blackhole_mss</literal></entry>
 780               <entry><acronym>MSS</acronym> to try for IPv4</entry>
 781             </row>
 782
 783             <row>
 784               <entry><literal>net.inet.tcp.v6pmtud_blackhole_mss</literal></entry>
 785               <entry><acronym>MSS to try for IPv6</acronym></entry>
 786             </row>
 787           </tbody>
 788         </tgroup>
 789       </informaltable>
 790
 791       <para>New monitoring &man.sysctl.8;s haven been added:</para>
 792
 793       <informaltable frame="none" pgwide="0">
 794         <tgroup cols="2">
 795           <colspec colwidth="1*"/>
 796           <colspec colwidth="1*"/>
 797           <thead>
 798             <row>
 799               <entry>Tunable</entry>
 800               <entry>Description</entry>
 801             </row>
 802           </thead>
 803
 804           <tbody>
 805             <row>
 806               <entry><literal>net.inet.tcp.pmtud_blackhole_activated</literal></entry>
 807               <entry>Number of times the code was activated to attempt
 808                 downshifting the <acronym>MSS</acronym></entry>
 809             </row>
 810
 811             <row>
 812               <entry><literal>net.inet.tcp.pmtud_blackhole_min_activated</literal></entry>
 813               <entry>Number of times the blackhole
 814                 <acronym>MSS</acronym> was used in an attempt to
 815                 downshift</entry>
 816             </row>
 817
 818             <row>
 819               <entry><literal>net.inet.tcp.pmtud_blackhole_failed</literal></entry>
 820               <entry>Number of times that the blackhole failed to
 821                 connect after downshifting the
 822                 <acronym>MSS</acronym></entry>
 823             </row>
 824           </tbody>
 825         </tgroup>
 826       </informaltable>
 827
 828     </sect2>
 829   </sect1>
 830
 831   <sect1 xml:id="ports">
 832     <title>Ports Collection and Package Infrastructure</title>
 833
 834     <para>This section covers changes to the &os;&nbsp;Ports
 835       Collection, package infrastructure, and package maintenance and
 836       installation tools.</para>
 837
 838     <sect2 xml:id="ports-infrastructure">
 839       <title>Infrastructure Changes</title>
 840
 841       <para>&nbsp;</para>
 842     </sect2>
 843
 844     <sect2 xml:id="ports-packages ">
 845       <title>Packaging Changes</title>
 846
 847       <para>&nbsp;</para>
 848     </sect2>
 849   </sect1>
 850
 851   <sect1 xml:id="doc">
 852     <title>Documentation</title>
 853
 854     <para>This section covers changes to the &os;&nbsp;Documentation
 855       Project sources and toolchain.</para>
 856
 857     <sect2 xml:id="doc-sources">
 858       <title>Documentation Source Changes</title>
 859
 860       <para>&nbsp;</para>
 861     </sect2>
 862
 863     <sect2 xml:id="doc-toolchain">
 864       <title>Documentation Toolchain Changes</title>
 865
 866       <para>&nbsp;</para>
 867     </sect2>
 868   </sect1>
 869
 870   <sect1 xml:id="releng">
 871     <title>Release Engineering and Integration</title>
 872
 873     <para>This section convers changes that are specific to the
 874       &os;&nbsp;Release Engineering processes.</para>
 875
 876     <sect2 xml:id="releng-changes">
 877       <title>Integration Changes</title>
 878
 879       <para revision="283161" contrib="sponsor" sponsor="&ff;">The
 880         Release Engineering build tools have been updated to support
 881         building &os;/&arch.arm; images without external utilities for
 882         supported boards where a corresponding
 883         <literal>u-boot</literal> port exists in the Ports
 884         Collection.</para>
 885
 886       <para revision="283548" contrib="sponsor" sponsor="&ff;">The
 887         &os;/&arch.i386; memory stick installation images are now
 888         created using the &man.mkimg.1; utility, matching the way
 889         the &os;/&arch.amd64; images are created.</para>
 890     </sect2>
 891   </sect1>
 892 </article>