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