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13 <article xmlns="http://docbook.org/ns/docbook"
14 xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0">
17 <title>&os; &release.current; Release Notes</title>
20 <orgname>The &os; Project</orgname>
23 <pubdate>$FreeBSD$</pubdate>
25 <!-- Last rev: 284813 -->
29 <holder role="mailto:doc@FreeBSD.org">The &os; Documentation
33 <legalnotice xml:id="trademarks" role="trademarks">
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
53 <sect1 xml:id="intro">
54 <title>Introduction</title>
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>
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
67 xlink:href="&release.url;">&release.url;</uri>.</para>
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
75 xlink:href="&release.url;">&release.url;</uri>.</para>
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
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>
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>
96 <para>This document describes the most user-visible new or changed
97 features in &os; since &release.prev;.</para>
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
110 <sect1 xml:id="upgrade">
111 <title>Upgrading from Previous Releases of &os;</title>
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
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>
128 <para>Upgrading &os; should only be attempted after
129 backing up <emphasis>all</emphasis> data and configuration
134 <sect1 xml:id="security-errata">
135 <title>Security and Errata</title>
137 <para>This section lists the various Security Advisories and
138 Errata Notices since &release.prev;.</para>
140 <sect2 xml:id="security">
141 <title>Security Advisories</title>
146 <sect2 xml:id="errata">
147 <title>Errata Notices</title>
153 <sect1 xml:id="userland">
154 <title>Userland</title>
156 <para>This section covers changes and additions to userland
157 applications, contributed software, and system utilities.</para>
159 <sect2 xml:id="userland-config">
160 <title>Userland Configuration Changes</title>
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>
170 <sect2 xml:id="userland-programs">
171 <title>Userland Application Changes</title>
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>
178 <para revision="275945">The &man.elfdump.1; utility has been
179 updated to support capability mode provided by
180 &man.capsicum.4;.</para>
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>
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
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>
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>
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
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
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>
218 <para revision="282974" contrib="sponsor" sponsor="&ff;">The
219 &man.uefisign.8; utility has been added.</para>
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>
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>
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>
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>
242 <sect2 xml:id="userland-contrib">
243 <title>Contributed Software</title>
245 <para revision="282746" contrib="sponsor" sponsor="&ff;">The
246 &man.resolvconf.8; utility has been updated to version
249 <para revision="283270">The &man.nc.1; utility has been updated
250 to the OpenBSD 5.7 version.</para>
252 <para revision="284398">Timezone data files have been updated to
253 version 2015e.</para>
255 <para revision="284460">The &man.acpi.4; subsystem has been
256 updated to version 20150515.</para>
258 <para revision="284778">The &man.file.1; utility has been
259 updated to version 5.23.</para>
261 <para revision="285206">The &man.unbound.8; utility has been
262 updated to version 1.5.3.</para>
264 <para revision="285305">The <application>sendmail</application>
265 utility has been updated to version 8.15.2.</para>
267 <para revision="285330"><application>OpenSSL</application> has
268 been updated to version 1.0.1p.</para>
271 <sect2 xml:id="userland-installer">
272 <title>Installation and Configuration Tools</title>
277 <sect2 xml:id="userland-rc">
278 <title><filename class="directory">/etc/rc.d</filename>
281 <para revision="284009">A new &man.rc.8; script,
282 <filename>growfs</filename>, has been added, which will resize
283 the root filesystem on boot if <filename>/firstboot</filename>
287 <sect2 xml:id="userland-periodic">
288 <title><filename class="directory">/etc/periodic</filename>
291 <para revision="277520" contrib="sponsor" sponsor="&ff;">A new
292 &man.periodic.8; script,
293 <filename>510.status-world-kernel</filename>, has been added,
294 which evaluates the running userland and kernel versions from
295 the &man.uname.1; <literal>-U</literal> and
296 <literal>-K</literal> arguments, and prints an error if the
297 system userland and kernel are not in sync.</para>
300 <sect2 xml:id="userland-libraries">
301 <title>Runtime Libraries and API</title>
303 <para revision="275040">A new file configuration library,
304 &man.figpar.3;, has been added to the base system.</para>
306 <para revision="280392">The &man.setmode.3; function has been
307 updated to consistently set <literal>errno</literal> on
311 <sect2 xml:id="userland-abi">
312 <title>ABI Compatibility</title>
318 <sect1 xml:id="kernel">
319 <title>Kernel</title>
321 <para>This section covers changes to kernel configurations, system
322 tuning, and system control parameters that are not otherwise
325 <sect2 xml:id="kernel-bugfix">
326 <title>Kernel Bug Fixes</title>
331 <sect2 xml:id="kernel-config">
332 <title>Kernel Configuration</title>
334 <para revision="283076" contrib="sponsor" sponsor="&intelcorp;"
335 arch="amd64,i386">The &man.nvd.4; and &man.nvme.4; drivers are
336 now included in the <filename>GENERIC</filename> kernel
337 configuration by default.</para>
339 <para revision="284522" contrib="sponsor"
340 sponsor="&limelight;">A new kernel configuration option,
341 <literal>EM_MULTIQUEUE</literal>, has been added which enables
342 multi-queue support in the &man.em.4; driver.</para>
345 <para>Multi-queue support in the &man.em.4; driver is not
346 officially supported by &intel;.</para>
350 <sect2 xml:id="kernel-sysctl">
351 <title>System Tuning and Controls</title>
353 <para revision="276986">Throttling via <acronym>ACPI</acronym>
354 and <acronym>P4TCC</acronym> via &man.device.hints.5; have
355 been turned off by default.</para>
357 <para revision="278982" contrib="sponsor" sponsor="&ff;">The
358 &man.hwpmc.4; default and maximum callchain depths have been
359 increased. The default has been increased from 16 to 32, and
360 the maximum increased from 32 to 128.</para>
362 <para revision="281255" contrib="sponsor"
363 sponsor="&ix;, &ff;">The &man.devfs.5; device filesystem has
364 been changed to update timestamps for read/write operations
365 using seconds precision. A new &man.sysctl.8;,
366 <literal>vfs.devfs.dotimes</literal> has been added, which
367 when set to a non-zero value, enables default precision
368 timestamps for these operations.</para>
370 <para revision="280632">The <literal>kern.osrelease</literal>
371 and <literal>kern.osreldate</literal> are now configurable
372 &man.jail.8; parameters.</para>
374 <para revision="284665" contrib="sponsor" sponsor="&ff;">A new
375 &man.sysctl.8;, <literal>kern.racct.enable</literal>, has been
376 added, which when set to a non-zero value allows using
377 &man.rctl.8; with the <literal>GENERIC</literal> kernel.
378 A new kernel configuration option,
379 <literal>RACCT_DISABLED</literal> has also been added.</para>
381 <para revision="284665" contrib="sponsor" sponsor="&ff;">The
382 <literal>GENERIC</literal> kernel configuration now includes
383 <literal>RACCT</literal> and <literal>RCTL</literal> by
387 <para>To enable <literal>RACCT</literal> and
388 <literal>RCTL</literal> on a system using the
389 <literal>GENERIC</literal> kernel configuration, add
390 <literal>kern.racct.enable=1</literal> to
391 &man.loader.conf.5;, and reboot the system.</para>
396 <sect1 xml:id="drivers">
397 <title>Devices and Drivers</title>
399 <para>This section covers changes and additions to devices and
400 device drivers since &release.prev;.</para>
402 <sect2 xml:id="drivers-device">
403 <title>Device Drivers</title>
405 <para revision="282199">The <literal>drm</literal> code has
406 been updated to match &linux; version 3.8.13.</para>
409 <sect2 xml:id="drivers-storage">
410 <title>Storage Drivers</title>
412 <para revision="281957">The &man.hptnr.4; driver has been
413 updated to version 1.1.1.</para>
416 <sect2 xml:id="drivers-network">
417 <title>Network Drivers</title>
419 <para revision="274486">The &man.pfil.9; interface default hash
420 has been changed from <literal>Jenkins</literal> to
421 <literal>Murmur3</literal>, providing a 3-percent performance
422 increase in packets-per-second.</para>
424 <para revision="279157">The &man.ral.4; driver has been updated
425 to support the RT5390 and RT5392 chipsets.</para>
427 <para revision="284066" contrib="sponsor" sponsor="&yandex;">The
428 &man.gre.4; driver has been significantly overhauled, and has
429 been split into two separate modules, &man.gre.4; and
432 <para revision="284365">The &man.vxlan.4; driver has been added,
433 which creates a virtual Layer 2 (Ethernet) network overlaid in
434 a Layer 3 (IP/UDP) network. The &man.vxlan.4; driver is
435 analogous to &man.vlan.4;, but is designed to be better suited
436 for large, multiple-tenant datacenter environments.</para>
440 <sect1 xml:id="hardware">
441 <title>Hardware Support</title>
443 <para>This section covers general hardware support for physical
444 machines, hypervisors, and virtualization environments, as well
445 as hardware changes and updates that do not otherwise fit in
446 other sections of this document.</para>
448 <sect2 xml:id="hardware-support">
449 <title>Hardware Support</title>
454 <sect2 xml:id="hardware-virtualization">
455 <title>Virtualization Support</title>
457 <para revision="275273">The &man.virtio.console.4; driver has
458 been added, which provides an interface to VirtIO console
459 devices through a &man.tty.4; device.</para>
461 <para revision="276403">The &man.bhyve.8; hypervisior has been
462 updated to support &amd; processors with
463 <acronym>SVM</acronym> and <acronym>AMD-V</acronym> hardware
466 <para revision="280370">The &man.bhyve.8; hypervisor has been
467 updated to support <literal>DSM TRIM</literal> commands for
468 virtual <acronym>AHCI</acronym> disks.</para>
470 <para revision="283280" contrib="sponsor" sponsor="&msostc;">The
471 Hyper-V™ drivers have been updated with several
476 <para>The &man.hv.vmbus.4; driver now has multi-channel
481 <para>The &man.hv.storvsc.4; driver now has scatter/gather
482 support, in addition to performance improvements.</para>
486 <para>The &man.hv.kvp.4; driver has received several bug
491 <para revision="285236" contrib="sponsor" sponsor="&msostc;">The
492 &man.hv.netvsc.4; driver has been updated to support checksum
493 offloading and <acronym>TSO</acronym>.</para>
496 <sect2 xml:id="hardware-arm">
497 <title>ARM Support</title>
499 <para revision="278608">The <literal>bcm2835_cpufreq</literal>
500 driver has been added, which supports <acronym>CPU</acronym>
501 frequency and voltage control on the Raspberry Pi
502 <acronym>SOC</acronym>.</para>
506 <sect1 xml:id="storage">
507 <title>Storage</title>
509 <para>This section covers changes and additions to file systems
510 and other storage subsystems, both local and networked.</para>
512 <sect2 xml:id="storage-general">
513 <title>General Storage</title>
515 <para revision="279002" contrib="sponsor" sponsor="&ix;">The
516 &man.ctl.4; <acronym>LUN</acronym> mapping has been rewritten,
517 replacing <acronym>iSCSI</acronym>-specific mapping mechanisms
518 with a new mechanism that works for any port.</para>
520 <para revision="279055" contrib="sponsor" sponsor="&ix;">The
521 &man.ctld.8; utility has been updated to allow controlling
522 non-<acronym>iSCSI</acronym> &man.ctl.4; ports.</para>
524 <para revision="283223" contrib="sponsor" sponsor="&ff;">The
525 &man.autofs.5; subsystem has been updated to include a new
526 &man.auto.master.5; map, <literal>-media</literal>, which
527 allows automatically mounting removable media, such as
528 <acronym>CD</acronym> drives or <acronym>USB</acronym> flash
531 <para revision="283242" contrib="sponsor" sponsor="&ff;">The
532 &man.autofs.5; subsystem has been updated to include a new
533 &man.auto.master.5; map, <literal>-noauto</literal>, which
534 handles &man.fstab.5; entries set to
535 <literal>noauto</literal>.</para>
538 <sect2 xml:id="storage-net">
539 <title>Networked Storage</title>
541 <para revision="274939" contrib="sponsor" sponsor="&ix;">The
542 &man.ctld.8; utility has been updated to include support for
543 registering <acronym>iSCSI</acronym> targets and portals on
544 <acronym>iSNS</acronym> servers. This provides a mechanism
545 which allows <acronym>iSCSI</acronym> initiators to find
546 targets and portals without requiring active
550 <sect2 xml:id="storage-zfs">
553 <para revision="275490">A new tunable,
554 <literal>vfs.zfs.spa_slop_shift</literal>, has been added,
555 which controls how much space is reserved by default.</para>
557 <para revision="277583">The <literal>arc_meta_limit</literal>
558 statistics are now visible through the
559 <literal>kstat</literal> &man.sysctl.8;. As a result of this
560 change, the <literal>vfs.zfs.arc_meta_used</literal>
561 &man.sysctl.8; has been removed, and replaced with the
562 <literal>kstat.zfs.misc.arcstats.arc_meta_used</literal>
563 &man.sysctl.8;.</para>
566 <sect2 xml:id="storage-geom">
567 <title>&man.geom.4;</title>
569 <para revision="275891" contrib="sponsor" sponsor="&ix;">The
570 &man.ctl.4; subsystem has been updated, increasing the ports
571 limit from <literal>128</literal> to <literal>256</literal>,
572 and <acronym>LUN</acronym> limit from <literal>256</literal>
573 to <literal>1024</literal>.</para>
575 <para revision="282861">Support for the
576 <literal>apple-boot</literal>, <literal>apple-hfs</literal>,
577 and <literal>apple-ufs</literal> <acronym>MBR</acronym>
578 partitioning schemes have been added to &man.gpart.8;.</para>
582 <sect1 xml:id="boot">
583 <title>Boot Loader Changes</title>
585 <para>This section covers the boot loader, boot menu, and other
586 boot-related changes.</para>
588 <sect2 xml:id="boot-loader">
589 <title>Boot Loader Changes</title>
591 <para revision="281843">The boot loader has been updated to
592 support entering the <acronym>GELI</acronym> passphrase before
593 loading the kernel. To enable this behavior, add
594 <literal>geom_eli_passphrase_prompt="YES"</literal> to
595 &man.loader.conf.5;.</para>
597 <para revision="283262" contrib="sponsor" sponsor="&ff;">The
598 memory test run at boot time on &os;/&arch.amd64; platforms
599 has been disabled by default.</para>
601 <para revision="283972">A new &man.ttys.5; class,
602 <literal>3wire</literal>, has been added. This is similar to
603 the existing terminal classes, but does not have a defined
606 <para revision="284775" contrib="sponsor" sponsor="&ff;"
607 arch="arm">The &man.ttys.5; file for &os;/&arch.arm; has been
608 updated to enable <filename>ttyu1</filename>,
609 <filename>ttyu2</filename>, and <filename>ttyu3</filename> by
610 default, if the callin port is an active console port.</para>
613 <sect2 xml:id="boot-menu">
614 <title>Boot Menu Changes</title>
620 <sect1 xml:id="network">
621 <title>Networking</title>
623 <para>This section describes changes that affect networking in
626 <sect2 xml:id="network-protocols">
627 <title>Network Procols</title>
633 <sect1 xml:id="ports">
634 <title>Ports Collection and Package Infrastructure</title>
636 <para>This section covers changes to the &os; Ports
637 Collection, package infrastructure, and package maintenance and
638 installation tools.</para>
640 <sect2 xml:id="ports-infrastructure">
641 <title>Infrastructure Changes</title>
646 <sect2 xml:id="ports-packages ">
647 <title>Packaging Changes</title>
654 <title>Documentation</title>
656 <para>This section covers changes to the &os; Documentation
657 Project sources and toolchain.</para>
659 <sect2 xml:id="doc-sources">
660 <title>Documentation Source Changes</title>
665 <sect2 xml:id="doc-toolchain">
666 <title>Documentation Toolchain Changes</title>
672 <sect1 xml:id="releng">
673 <title>Release Engineering and Integration</title>
675 <para>This section convers changes that are specific to the
676 &os; Release Engineering processes.</para>
678 <sect2 xml:id="releng-changes">
679 <title>Integration Changes</title>
681 <para revision="283161" contrib="sponsor" sponsor="&ff;">The
682 Release Engineering build tools have been updated to support
683 building &os;/&arch.arm; images without external utilities for
684 supported boards where a corresponding
685 <literal>u-boot</literal> port exists in the Ports
688 <para revision="283548" contrib="sponsor" sponsor="&ff;">The
689 &os;/&arch.i386; memory stick installation images are now
690 created using the &man.mkimg.1; utility, matching the way
691 the &os;/&arch.amd64; images are created.</para>