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4 <!ENTITY % release PUBLIC "-//FreeBSD//ENTITIES Release Specification//EN" "release.ent">
6 <!ENTITY % sponsor PUBLIC "-//FreeBSD//ENTITIES Sponsor Specification//EN" "sponsor.ent">
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11 <!ENTITY errata SYSTEM "../../share/xml/errata.xml">
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: 284814 -->
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;. In general, changes
98 described here are unique to the &release.branch; branch unless
99 specifically marked as &merged; features.</para>
101 <para>Typical release note items document recent security
102 advisories issued after &release.prev;, new drivers or hardware
103 support, new commands or options, major bug fixes, or
104 contributed software upgrades. They may also list changes to
105 major ports/packages or release engineering practices. Clearly
106 the release notes cannot list every single change made to &os;
107 between releases; this document focuses primarily on security
108 advisories, user-visible changes, and major architectural
112 <sect1 xml:id="upgrade">
113 <title>Upgrading from Previous Releases of &os;</title>
115 <para arch="amd64,i386">Binary upgrades between RELEASE versions
116 (and snapshots of the various security branches) are supported
117 using the &man.freebsd-update.8; utility. The binary upgrade
118 procedure will update unmodified userland utilities, as well as
119 unmodified GENERIC kernels distributed as a part of an official
120 &os; release. The &man.freebsd-update.8; utility requires that
121 the host being upgraded have Internet connectivity.</para>
123 <para>Source-based upgrades (those based on recompiling the &os;
124 base system from source code) from previous versions are
125 supported, according to the instructions in
126 <filename>/usr/src/UPDATING</filename>.</para>
129 <para>Upgrading &os; should only be attempted after backing up
130 <emphasis>all</emphasis> data and configuration files.</para>
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="266463">The default &man.newsyslog.conf.5; now
163 includes files in the
164 <filename>/etc/newsyslog.conf.d/</filename> and
165 <filename>/usr/local/etc/newsyslog.conf.d/</filename>
166 directories by default for &man.newsyslog.8;.</para>
168 <para revision="270675">The &man.mailwrapper.8; utility has been
169 updated to use &man.mailer.conf.5; from the
170 <literal>LOCALBASE</literal> environment variable, which
171 defaults to <filename class="directory">/usr/local</filename>
174 <para revision="272350">The <literal>MK_ARM_EABI</literal>
175 &man.src.conf.5; option has been removed.</para>
178 <sect2 xml:id="userland-programs">
179 <title>Userland Application Changes</title>
181 <para revision="258838" contrib="sponsor" sponsor="&ff;,
182 &google;" sponsorurl="">The &man.casperd.8; daemon has been
183 added, which provides access to functionality that is not
184 available in the <quote>capability mode</quote>
187 <para revision="260594">When unable to load a kernel module with
188 &man.kldload.8;, a message informing to view output of
189 &man.dmesg.8; is now printed, opposed to the previous output
190 <quote>Exec format error.</quote>.</para>
192 <para revision="260910">Allow &man.pciconf.8; to identify PCI
193 devices that are attached to a driver to be identified by
194 their device name instead of just the selector. Additionally,
195 an optional device argument to the <literal>-l</literal> flag
196 to restrict the output to only listing details about a single
199 <para revision="260913">A new flag, <quote>onifconsole</quote>
200 has been added to <filename>/etc/ttys</filename>. This allows
201 the system to provide a login prompt via serial console if the
202 device is an active kernel console, otherwise it is equivalent
203 to <literal>off</literal>.</para>
205 <para revision="260926">Support for displaying VPD for PCI
206 devices via &man.pciconf.8; has been added.</para>
208 <para revision="261498">&man.ping.8; protects against malicious
209 network packets using the Capsicum framework to drop
212 <para revision="265229">The &man.ps.1; utility has been
213 updated to include the <literal>-J</literal> flag, used to
214 filter output by matching &man.jail.8; IDs and names.
215 Additionally, argument <literal>0</literal> can be used to
216 <literal>-J</literal> to only list processes running on the
219 <para revision="265249">The &man.top.1; utility has been updated
220 to filter by &man.jail.8; ID or name, in followup to the
221 &man.ps.1; change in <literal>r265229</literal>.</para>
223 <para revision="266209">The &man.pmcstat.8; utility has been
224 updated to include a new flag, <literal>-l</literal>, which
225 ends event collection after the specified number of
228 <para revision="270745">The &man.ps.1; utility has been updated
229 to include a new keyword, <quote>tracer</quote>, which
230 displays the <acronym>PID</acronym> of the tracing
233 <para revision="271482">Support for adding empty partitions has
234 been added to the &man.mkimg.1; utility.</para>
236 <para revision="272166">The &man.primes.6; utility has been
237 updated to correctly enumerate prime numbers between
238 <literal>4295098369</literal> and
239 <literal>3825123056546413050</literal>, which prior to this
240 change, it would be possible for returned values to be
241 incorrectly identified as prime numbers.</para>
243 <para revision="272198">The &man.mkimg.1; utility has been
244 updated to include three options used to print information
245 about &man.mkimg.1; itself:</para>
247 <informaltable frame="none" pgwide="0">
249 <colspec colwidth="1*"/>
250 <colspec colwidth="1*"/>
253 <entry>Option</entry>
254 <entry>Output</entry>
260 <entry><literal>--version</literal></entry>
261 <entry>The current version of the &man.mkimg.1;
266 <entry><literal>--formats</literal></entry>
267 <entry>The disk image file formats supported by
268 &man.mkimg.1;</entry>
272 <entry><literal>--schemes</literal></entry>
273 <entry>The partition schemes supported by
274 &man.mkimg.1;</entry>
280 <para revision="272488">Userland &man.ctf.5; support in
281 &man.dtrace.1; has been added. With this change,
282 &man.dtrace.1; is able to resolve type info for function and
283 <acronym>USDT</acronym> probe arguments, and function return
286 <para revision="274960">The &man.elfdump.1; utility has been
287 updated to support capability mode provided by
288 &man.capsicum.4;.</para>
290 <para revision="275680" contrib="sponsor" sponsor="&ff;">The
291 &man.fstyp.8; utility has been added, which is used to
292 determine the filesystem on a specified device.</para>
294 <para revision="276881">The <literal>libedit</literal> library
295 has been updated to support <acronym>UTF</acronym>-8, which
296 additionally provides unicode support to &man.sh.1;.</para>
298 <para revision="276893" contrib="sponsor" sponsor="&ff;">The
299 &man.mkimg.1; utility has been updated to support the
300 <acronym>MBR</acronym> <acronym>EFI</acronym> partition
303 <para revision="277166" arch="powerpc">The &man.ptrace.2; system
304 call has been updated include support for Altivec registers on
305 &os;/&arch.powerpc;.</para>
307 <para revision="278320">A new device control utility,
308 &man.devctl.8; has been added, which allows making
309 administrative changes to individual devices, such as
310 attaching and detaching drivers, and enabling and disabling
311 devices. The &man.devctl.8; utility uses the new
312 &man.devctl.3; library.</para>
314 <para revision="279122" contrib="sponsor"
315 sponsor="&juniper;">The &man.netstat.1; utility has been
316 updated to link against the &man.libxo.3; shared
319 <para revision="279139">A new flag, <literal>-c</literal>, has
320 been added to the &man.mkimg.1; utility, which allows
321 specifying the capacity of the target disk image.</para>
323 <para revision="279315" contrib="sponsor" sponsor="&ff;">The
324 &man.uefisign.8; utility has been added.</para>
326 <para revision="279571" contrib="sponsor"
327 sponsor="&scaleengine;">The &man.freebsd-update.8; utility has
328 been updated to prevent fetching updated binary patches when
329 a previous upgrade has not been thoroughly completed.</para>
331 <para revision="280870">A regression in the &man.libarchive.3;
332 library that would prevent a directory from being included in
333 the archive when <literal>--one-file-system</literal> is used
334 has been fixed.</para>
336 <para revision="281311" contrib="sponsor" sponsor="&ff;">The
337 &man.ar.1; utility has been updated to set
338 <literal>ARCHIVE_EXTRACT_SECURE_SYMLINKS</literal> and
339 <literal>ARCHIVE_EXTRACT_SECURE_NODOTDOT</literal> to disallow
340 directory traversal when extracting an archive, similar to
343 <para revision="281617">A race condition in &man.wc.1; that
344 would cause final results to be sent to &man.stderr.4; when
345 receiving the <literal>SIGINFO</literal> signal has been
348 <para revision="282208" contrib="sponsor"
349 sponsor="&multiplay;">The &man.chflags.1;, &man.chgrp.1;,
350 &man.chmod.1;, and &man.chown.8; utilities now affect symbolic
351 links when the <literal>-R</literal> flag is specified, as
352 documented in &man.symlink.7;.</para>
354 <para revision="282608">The &man.date.1; utility has been
355 updated to print the modification time of the file passed as
356 an argument to the <literal>-r</literal> flag, improving
357 compatibility with the <acronym>GNU</acronym> &man.date.1;
358 utility behavior.</para>
360 <para revision="283961">The &man.pw.8; utility has been updated
361 with a new flag, <literal>-R</literal>, that sets the root
362 directory within which the utility will operate.</para>
364 <para revision="284297" contrib="sponsor"
365 sponsor="&clusterhq;">The &man.lockstat.1; utility has been
366 updated with several improvements:</para>
370 <para>Spin locks are now reported as the amount of time
371 spinning, instead of loop iterations.</para>
375 <para>Reader locks are now recognized as adaptive that can
380 <para>Lock aquisition events for successful reader try-lock
381 events are now reported.</para>
385 <para>Spin and block events are now reported before lock
386 acquisition events.</para>
390 <para revision="284589" contrib="sponsor"
391 sponsor="&scaleengine;">The &man.fstyp.8; utility has been
392 updated to be able to detect &man.zfs.8; and &man.geli.8;
395 <para revision="285550">The &man.w.1; utility has been updated
396 to display the full IPv6 remote address of the host from which
397 a user is connected.</para>
400 <sect2 xml:id="userland-contrib">
401 <title>Contributed Software</title>
403 <para revision="258884" contrib="sponsor"
404 sponsor="&darpa_afrl;">&man.lldb.1; has been updated to
405 upstream snapshot version r196259.</para>
407 <para revision="260445">&man.byacc.1; has been updated to
408 version 20140101.</para>
410 <para revision="261071">&man.jemalloc.3; has been updated to
411 version 3.5.0.</para>
413 <para revision="261283"><application>libc++</application> has
414 been updated to version 3.4.</para>
416 <para revision="261320"><application>OpenSSH</application> has
417 been updated to 6.5p1.</para>
419 <para revision="261344"><application>mdocml</application> has
420 been updated to version 1.12.3.</para>
422 <para revision="261991"><application>LLVM</application> and
423 <application>Clang</application> have been updated to
426 <para revision="275718">The <application>binutils</application>
427 suite of utilities has been updated to include upstream
428 patches that add new relocations for &arch.powerpc;
431 <para revision="276398" contrib="sponsor" sponsor="&ff;">The
432 <application>ELF Tool Chain</application> has been updated to
433 upstream revision r3136.</para>
435 <para revision="276551">The <application>texinfo</application>
436 utility and <literal>info</literal> pages were removed from
437 the base system. The <filename
438 role="package">print/texinfo</filename> port should be
439 installed on systems where <literal>info</literal> pages are
442 <para revision="276796" contrib="sponsor" sponsor="&ff;">The ELF
443 object manipulation tools
444 <application>addr2line</application>,
445 <application>elfcopy (strip)</application>,
446 <application>nm</application>,
447 <application>readelf</application>,
448 <application>size</application>, and
449 <application>strings</application> were switched to the
450 versions from the ELF Tool Chain project.</para>
452 <para revision="276881">The <literal>libedit</literal> library
453 has been updated to include <acronym>UTF-8</acronym> support,
454 adding <acronym>UTF-8</acronym> support to the &man.sh.1;
457 <para revision="278433">The &man.xz.1; utility has been updated
458 to support multi-threaded compression.</para>
460 <para revision="280932" contrib="sponsor" sponsor="&ff;">The
461 <application>elftoolchain</application> utilities have been
462 updated to version 3179.</para>
464 <para revision="281316">The &man.xz.1; utility has been updated
465 to version 5.2.1.</para>
467 <para revision="281373">The &man.nvi.1; utility has been updated
468 to version 2.1.3.</para>
470 <para revision="281806">The &man.wpa.supplicant.8; and
471 &man.hostapd.8; utilities have been updated to version
474 <para revision="282089">The &man.unbound.8; utility has been
475 updated to version 1.5.3.</para>
477 <para revision="282434" contrib="sponsor" sponsor="&ff;">The
478 &man.resolvconf.8; utility has been updated to version
481 <para revision="282613">The &man.nc.1; utility has been updated
482 to the OpenBSD 5.7 version.</para>
484 <para revision="283092">The &man.acpi.4; subsystem has been
485 updated to version 20150515.</para>
487 <para revision="284237">The &man.file.1; utility has been
488 updated to version 5.23.</para>
490 <para revision="284254"><application>bmake</application> has
491 been updated to version 20150606.</para>
493 <para revision="284397">Timezone data files have been updated to
494 version 2015e.</para>
496 <para revision="285229"><application>sendmail</application> has
497 been updated to 8.15.2. Starting with &os; 11.0 and
498 sendmail 8.15, sendmail uses uncompressed IPv6 addresses by
499 default, i.e., they will not contain <quote>::</quote>. For
500 example, instead of <quote>::1</quote>, it will be
501 <quote>0:0:0:0:0:0:0:1</quote>. This permits a zero subnet to
502 have a more specific match, such as different map entries for
503 IPv6:0:0 versus IPv6:0. This change requires that
504 configuration data (including maps, files, classes, custom
505 ruleset, etc.) must use the same format, so make certain such
506 configuration data is upgrading. As a very simple check
507 search for patterns like 'IPv6:[0-9a-fA-F:]*::' and 'IPv6::'.
508 To return to the old behavior, set the m4 option
509 <literal>confUSE_COMPRESSED_IPV6_ADDRESSES</literal> or the cf
510 option <literal>UseCompressedIPv6Addresses</literal>.</para>
512 <para revision="285329"><application>OpenSSL</application> has
513 been updated to version 1.0.1p.</para>
516 <sect2 xml:id="userland-installer">
517 <title>Installation and Configuration Tools</title>
519 <para revision="271539">The &man.bsdinstall.8; partition editor
520 and &man.sade.8; utility have been updated to include native
521 <acronym>ZFS</acronym> support.</para>
523 <para revision="272274">The &os; installation utility,
524 &man.bsdinstall.8;, has been updated to set the
525 <literal>canmount</literal> &man.zfs.8; property to
526 <literal>off</literal> for the <filename
527 class="directory">/var</filename> dataset, preventing the
528 contents of directories within <filename
529 class="directory">/var</filename> from conflicting when
530 using multiple boot environments, such as that provided by
531 <filename role="package">sysutils/beadm</filename>.</para>
533 <para revision="274394">The &man.bsdconfig.8; utility has been
534 updated to skip the initial &man.tzsetup.8;
535 <acronym>UTC</acronym> versus wall-clock time prompt when run
536 in a virtual machine, determined when the
537 <literal>kern.vm_guest</literal> &man.sysctl.8; is set to
538 <literal>1</literal>.</para>
540 <para revision="275874">The &man.bsdinstall.8; utility has been
541 updated to use the new &man.dpv.3; library to display progress
542 when extracting the &os; distributions.</para>
545 <sect2 xml:id="userland-rc">
546 <title><filename class="directory">/etc/rc.d</filename>
549 <para revision="270676">The &man.rc.8; subsystem has been
550 updated to allow configuring services in <filename
551 class="directory">${LOCALBASE}/etc/rc.conf.d/</filename>.
552 If <literal>LOCALBASE</literal> is unset, it defaults to
553 <filename class="directory">/usr/local</filename>.</para>
555 <para revision="273955">A new &man.rc.8; script,
556 <filename>growfs</filename>, has been added, which will resize
557 the root filesystem on boot if <filename>/firstboot</filename>
560 <para revision="275299">The <filename>mrouted</filename>
561 &man.rc.8; script has been removed from the base system. An
562 equivalent script is available from the <filename
563 role="package">net/mrouted</filename> port.</para>
565 <para revision="279463" contrib="sponsor"
566 sponsor="&sandvine;">A new &man.rc.8; script,
567 <filename>iovctl</filename>, has been added, which allows
568 automatically starting the &man.iovctl.8; utility at
572 <sect2 xml:id="userland-periodic">
573 <title><filename class="directory">/etc/periodic</filename>
576 <para revision="271321">The daily &man.periodic.8; script
577 <filename>110.clean-tmps</filename> has been updated to avoid
578 crossing filesystem mount boundaries when cleaning files in
579 <filename class="directory">/tmp</filename>.</para>
581 <para revision="277216" contrib="sponsor" sponsor="&ff;">A new
582 &man.periodic.8; script,
583 <filename>510.status-world-kernel</filename>, has been added,
584 which evaluates the running userland and kernel versions from
585 the &man.uname.1; <literal>-U</literal> and
586 <literal>-K</literal> arguments, and prints an error if the
587 system userland and kernel are not in sync.</para>
590 <sect2 xml:id="userland-libraries">
591 <title>Runtime Libraries and API</title>
593 <para revision="265995">The Blowfish &man.crypt.3; default
594 format has been changed to
595 <literal>$2b$</literal>.</para>
597 <para revision="268461">The &man.readline.3; library is now
598 statically linked in software within the base system, and the
599 shared library is no longer installed, allowing the Ports
600 Collection to use a modern version of the library.</para>
602 <para revision="272273">The &man.strptime.3; library has been
603 updated to add support for <acronym>POSIX</acronym>-2001
604 features <literal>%U</literal> and
605 <literal>%W</literal>.</para>
607 <para revision="272842,272848" contrib="sponsor"
608 sponsor="&ff;">The &man.dl.iterate.phdr.3; library has been
609 changed to always return the path name of the
610 <acronym>ELF</acronym> object in the
611 <literal>dlpi_name</literal> structure member.</para>
613 <para revision="273562" contrib="sponsor"
614 sponsor="&juniper;">The &man.libxo.3; library has been
615 imported to the base system.</para>
617 <para revision="273806" contrib="sponsor" sponsor="&chelsio;">A
618 userland library for Chelsio Terminator 5 based iWARP cards
619 has been added, allowing userland <acronym>RDMA</acronym>
620 applications to work over compatible
621 <acronym>NIC</acronym>s.</para>
623 <para revision="274987">The &man.gpio.3; library has been added,
624 providing a wrapper around the &man.gpio.4; kernel
627 <para revision="275800" contrib="sponsor" sponsor="&ff;">The
628 &man.procctl.2; system call has been updated to include
629 a facility for non-&man.init.8; processes to be declared as
630 the reaper of child processes and their decendants.</para>
632 <para revision="277610">The <literal>futimens()</literal> and
633 <literal>utimensat()</literal> system calls have been
634 added. See &man.utimensat.2; for more information.</para>
636 <para revision="278934">The &man.elf.3; compile-time dependency
637 has been removed from <filename>dtri.o</filename>, which
638 allows adding <application>DTrace</application> probes to
639 userland applications and libraries without also linking
640 against &man.elf.3;.</para>
642 <para revision="279186">The &man.setmode.3; function has been
643 updated to consistently set <literal>errno</literal> on
646 <para revision="279663">The &man.qsort.3; functions have been
647 updated to be able to handle 32-bit aligned data on 64-bit
648 platforms, also providing a significant improvement in 32-bit
651 <para revision="281130">Several standard include headers have
652 been updated to use of <application>gcc</application>
653 attributes, such as <literal>__result_use_check()</literal>,
654 <literal>__alloc_size()</literal>, and
655 <literal>__nonnull()</literal>.</para>
657 <para revision="281845">Support for file verification in
658 <acronym>MAC</acronym> has been added.</para>
660 <para revision="282973" contrib="sponsor" sponsor="&ff;">The
661 <literal>libgomp</literal> library is now only built when
662 building <acronym>GCC</acronym> from the base system. An
663 up-to-date version is available in the Ports Collection as
665 role="package">devel/libiomp5-devel</filename>.</para>
667 <para revision="282988">The <filename>stdlib.h</filename> and
668 <filename>malloc.h</filename> headers have been updated to
669 make use of the <application>gcc</application>
670 <literal>alloc_align()</literal> attribute.</para>
672 <para revision="284483" contrib="sponsor"
673 sponsor="&scaleengine;">The Blowfish &man.crypt.3; library
674 has been updated to support $2y$ hashes.</para>
677 <sect2 xml:id="userland-abi">
678 <title>ABI Compatibility</title>
680 <para revision="271982">The &linux; compatibility version has
681 been updated to <literal>2.6.18</literal>. The
682 <literal>compat.linux.osrelease</literal> &man.sysctl.8; is
683 evaluated when building the <filename
684 role="package">emulators/linux-c6</filename> and related
689 <sect1 xml:id="kernel">
690 <title>Kernel</title>
692 <para>This section covers changes to kernel configurations, system
693 tuning, and system control parameters that are not otherwise
696 <sect2 xml:id="kernel-bugfix">
697 <title>Kernel Bug Fixes</title>
699 <para revision="265876">A kernel bug that inhibited proper
700 functionality of the <literal>dev.cpu.0.freq</literal>
701 &man.sysctl.8; on &intel; processors with Turbo
702 Boost ™ enabled has been fixed.</para>
704 <para revision="271697" arch="powerpc">Support for
705 &man.dtrace.1; stack tracing has been fixed for
706 &os;/&arch.powerpc;, using the <literal>trapexit()</literal>
707 and <literal>asttrapexit()</literal> functions instead of
708 checking within addressed kernel space.</para>
710 <para revision="271917">A kernel panic triggered when destroying
711 a &man.vnet.9; &man.jail.8; configured with &man.gif.4; has
714 <para revision="271918">A kernel panic triggered when destroying
715 a &man.vnet.9; &man.jail.8; configured with &man.gre.4; has
718 <para revision="272089">A bug in &man.ipfw.4; that could
719 potentially lead to a kernel panic when using &man.dummynet.4;
720 at layer 2 has been fixed.</para>
722 <para revision="280930" contrib="sponsor" sponsor="&mitail;">The
723 kernel <acronym>RPC</acronym> has been updated to include
724 several enhancements:</para>
728 <para>The 45 MiB limit on requests queued for
729 &man.nfsd.8; threads has been removed.</para>
733 <para>Avoids unnecessary throttling by not deferring
734 accounting for completed requests.</para>
738 <para>Fixes an integer overflow and signedness bugs.</para>
742 <para revision="281261" arch="powerpc">Support for
743 &man.dtrace.1; has been added for the
744 Book-E ™.</para>
747 <sect2 xml:id="kernel-config">
748 <title>Kernel Configuration</title>
750 <para revision="266531">The <literal>IMAGACT_BINMISC</literal>
751 kernel configuration option has been enabled by default,
752 which enables application execution through emulators, such
753 as <application>Qemu</application>.</para>
755 <para revision="268045">The <literal>VT</literal> kernel
756 configuration file has been removed, and the &man.vt.4;
757 driver is included in the <literal>GENERIC</literal> kernel.
758 To enable &man.vt.4;, enter <literal>set kern.vty=vt</literal>
759 at the &man.loader.8; prompt during boot, or add
760 <literal>kern.vty=vt</literal> to &man.loader.conf.5; and
761 reboot the system.</para>
763 <para revision="277904">The &man.config.8; utility has been
764 updated to allow using a non-standard <filename
765 class="directory">src/</filename> tree, specified as an
766 argument to the <literal>-s</literal> flag.</para>
768 <para revision="277990" arch="powerpc64">The
769 &os;/&arch.powerpc64; kernel now builds as
770 a position-independent executable, allowing the kernel to be
771 loaded into and run from any physical or virtual
775 <para>This change requires an update to &man.loader.8;.
776 The userland and kernel must be updated before rebooting the
780 <para revision="278338" arch="arm">A new module for creating
781 <filename>rpi.dtb</filename> has been added for the Raspberry
784 <para revision="278340" arch="arm">The
785 <filename>rpi.dtb</filename> module is now installed to
786 <filename class="directory">/boot/dtb/</filename> by
787 default for the Raspberry Pi system.</para>
789 <para revision="279189" contrib="sponsor" sponsor="&ff;"
790 arch="powerpc">Kernel support for Vector-Scalar eXtension
791 (<acronym>VSX</acronym>) found on POWER7 and POWER8 hardware
792 has been added.</para>
794 <para revision="279252" contrib="sponsor" sponsor="&ff;"
795 arch="powerpc">The &man.pmap.9; implementation for 64-bit
796 &powerpc; processors has been overhaulded to improve
799 <para revision="279824" arch="arm">A new module for creating
800 the <filename>dtb</filename> module for AM335x systems has
803 <para revision="281495" contrib="sponsor" sponsor="&ff;">The
804 <literal>PAE_TABLES</literal> kernel configuration option has
805 been added for &os;/&arch.i386;, which instructs &man.pmap.9;
806 to use <acronym>PAE</acronym> format for page tables with
807 32-bit physical addresses. Unlike the <literal>PAE</literal>
808 option, <literal>PAE_TABLES</literal> preserves kernel binary
809 interface (<acronym>KBI</acronym>) compatibility with
810 non-<literal>PAE</literal> kernels, allowing
811 non-<literal>PAE</literal> kernel modules and drivers to work
812 with a <literal>PAE_TABLES</literal>-enabled kernel.
813 Additionally, system limits are tuned for 4GB maximum
814 <acronym>RAM</acronym>, avoiding kernel virtual address space
815 (<acronym>KVA</acronym>) exhaustion.</para>
817 <para revision="282215">The <literal>SIFTR</literal> kernel
818 configuration has been added, allowing building &man.siftr.4;
819 statically into the kernel.</para>
821 <para revision="282731" arch="arm">The &arch.arm; boot loader,
822 <filename>ubldr</filename>, is now relocatable. In addition,
823 <filename>ubldr.bin</filename> is now created during build
824 time, which is a stripped binary with an entry point of
825 <literal>0</literal>, providing the ability to specify the
826 load address by running <literal>go
827 ${loadaddr}</literal> in
828 <literal>u-boot</literal>.</para>
830 <para revision="282921" contrib="sponsor" sponsor="&intelcorp;"
831 arch="amd64,i386">The &man.nvd.4; and &man.nvme.4; drivers are
832 now included in the <filename>GENERIC</filename> kernel
833 configuration by default.</para>
835 <para revision="283959" contrib="sponsor"
836 sponsor="&limelight;">A new kernel configuration option,
837 <literal>EM_MULTIQUEUE</literal>, has been added which enables
838 multi-queue support in the &man.em.4; driver.</para>
841 <para>Multi-queue support in the &man.em.4; driver is not
842 officially supported by &intel;.</para>
846 <sect2 xml:id="kernel-sysctl">
847 <title>System Tuning and Controls</title>
849 <para revision="275140" contrib="sponsor" sponsor="&ff;">The
850 &man.hwpmc.4; default and maximum callchain depths have been
851 increased. The default has been increased from 16 to 32, and
852 the maximum increased from 32 to 128.</para>
854 <para revision="279361">The <literal>kern.osrelease</literal>
855 and <literal>kern.osreldate</literal> are now configurable
856 &man.jail.8; parameters.</para>
858 <para revision="280308,280949" contrib="sponsor"
859 sponsor="&ix;, &ff;">The &man.devfs.5; device filesystem has
860 been changed to update timestamps for read/write operations
861 using seconds precision. A new &man.sysctl.8;,
862 <literal>vfs.devfs.dotimes</literal> has been added, which
863 when set to a non-zero value, enables default precision
864 timestamps for these operations.</para>
866 <para revision="282213" contrib="sponsor" sponsor="&ff;">A new
867 &man.sysctl.8;, <literal>kern.racct.enable</literal>, has been
868 added, which when set to a non-zero value allows using
869 &man.rctl.8; with the <literal>GENERIC</literal> kernel.
870 A new kernel configuration option,
871 <literal>RACCT_DISABLED</literal> has also been added.</para>
873 <para revision="282901" contrib="sponsor" sponsor="&ff;">The
874 <literal>GENERIC</literal> kernel configuration now includes
875 <literal>RACCT</literal> and <literal>RCTL</literal> by
879 <para>To enable <literal>RACCT</literal> and
880 <literal>RCTL</literal> on a system using the
881 <literal>GENERIC</literal> kernel configuration, add
882 <literal>kern.racct.enable=1</literal> to
883 &man.loader.conf.5;, and reboot the system.</para>
886 <para revision="283136" contrib="sponsor"
887 sponsor="&limelight;">A new &man.sysctl.8;,
888 <literal>net.inet.tcp.hostcache.purgenow</literal>, has
889 been added, which when set to <literal>1</literal> during
890 runtime will flush all
891 <literal>net.inet.tcp.hostcache</literal> entries.</para>
895 <sect1 xml:id="drivers">
896 <title>Devices and Drivers</title>
898 <para>This section covers changes and additions to devices and
899 device drivers since &release.prev;.</para>
901 <sect2 xml:id="drivers-device">
902 <title>Device Drivers</title>
904 <para revision="260903">Support for GPS ports has been added to
907 <para revision="265132">The &man.full.4; device has been added,
908 and the <literal>lindev(4)</literal> device has been removed.
909 Prior to this change, <literal>lindev(4)</literal> provided
910 only the <filename>/dev/full</filename> character device,
911 returning <literal>ENOSPC</literal> on write attempts. As
912 this device is not specific to &linux;, a native &os; version
913 has been added.</para>
915 <para revision="271705">Hardware context support has been
916 added to the <literal>drm/i915</literal> driver, adding
917 support for <application>Mesa</application> 9.2 and
920 <para revision="273178">The &man.vt.4; driver has been updated,
921 replacing the bitmapped <literal>kern.vt.spclkeys</literal>
922 &man.sysctl.8; with individual
923 <literal>kern.vt.kbd_*</literal> variants.</para>
925 <para revision="273598">The &man.hpet.4; driver has been updated
927 <filename>/dev/hpet<replaceable>N</replaceable></filename>
928 device, providing access to <acronym>HPET</acronym> from
931 <para revision="280183">The <literal>drm</literal> code has
932 been updated to match &linux; version 3.8.13.</para>
934 <para revision="281440">The &man.psm.4; driver has been updated
935 to include improved support for newer Synaptics ®
936 touchpads and the ClickPad ® mouse on newer
937 Lenovo ™ laptops.</para>
939 <para revision="282783" arch="powerpc">Support for the Freescale
940 <acronym>PCI</acronym> Root Complex device has been
944 <sect2 xml:id="drivers-storage">
945 <title>Storage Drivers</title>
947 <para revision="265236" contrib="sponsor"
948 sponsor="&lsi;, &spectralogic;" sponsorurl="">The &man.mpr.4;
949 device has been added, providing support for LSI Fusion-MPT
950 3 12Gb SCSI/SATA controllers.</para>
952 <para revision="265555" contrib="sponsor"
953 sponsor="&lsi;">The &man.mrsas.4; driver has been added,
954 providing support for LSI MegaRAID SAS controllers. The
955 &man.mfi.4; driver will attach to the controller, by default.
956 To enable &man.mrsas.4; add
957 <literal>hw.mfi.mrsas_enable=1</literal> to
958 <filename>/boot/loader.conf</filename>, which turns off
959 &man.mfi.4; device probing.</para>
962 <para>At this time, the &man.mfiutil.8; utility and the &os;
963 version of <application>MegaCLI</application> and
964 <application>StorCli</application> do not work with
965 &man.mrsas.4;.</para>
968 <para revision="275461" contrib="sponsor" sponsor="&ix;">The
969 &man.ctl.4; subsystem has been updated, increasing the ports
970 limit from <literal>128</literal> to <literal>256</literal>,
971 and <acronym>LUN</acronym> limit from <literal>256</literal>
972 to <literal>1024</literal>.</para>
974 <para revision="276526">The <literal>asr(4)</literal> driver has
975 been removed, and is no longer supported.</para>
977 <para revision="281387">The &man.hptnr.4; driver has been
978 updated to version 1.1.1.</para>
981 <sect2 xml:id="drivers-network">
982 <title>Network Drivers</title>
984 <para revision="258830">Support for Broadcom chipsets BCM57764,
985 BCM57767, BCM57782, BCM57786 and BCM57787 has been added to
988 <para revision="260448">Support for the &intel; Centrino™
989 Wireless-N 135 chipset has been added.</para>
991 <para revision="260552">Firmware for &intel; Centrino™
992 Wireless-N 105 devices has been added to the base
995 <para revision="261975">The deprecated nve(4) driver has been
996 removed. Users of NVIDIA nForce MCP network adapters are
997 advised to use the &man.nfe.4; driver instead, which has been
998 the default driver for this hardware since
999 &os; 7.0.</para>
1001 <para revision="264601" contrib="sponsor"
1002 sponsor="&darpa_afrl;">The <literal>if_nf10bmac(4)</literal>
1003 device has been added, providing support for NetFPGA-10G
1004 Embedded CPU Ethernet Core.</para>
1007 <para>The <literal>if_nf10bmac(4)</literal> driver operates on
1008 the FPGA, and is not suited for the PCI host
1012 <para revision="265348" contrib="sponsor"
1013 sponsor="&netgate;">The &man.ath.hal.4; driver has been
1014 updated to support the Atheros AR1111 chipset.</para>
1016 <para revision="266770">Support for the &intel; Centrino™
1017 Wireless-N 105 chipset has been added.</para>
1019 <para revision="266757" contrib="sponsor"
1020 sponsor="&chelsio;">Support for the &man.cxgbe.4; Terminator
1021 5 (T5) 10G/40G cards has been added to &man.netmap.4;.</para>
1023 <para revision="272730">The &man.alc.4; driver has been updated
1024 to support AR816x and AR817x ethernet controllers.</para>
1026 <para revision="272906">The &man.pfil.9; interface default hash
1027 has been changed from <literal>Jenkins</literal> to
1028 <literal>Murmur3</literal>, providing a 3-percent performance
1029 increase in packets-per-second.</para>
1031 <para revision="273331">The &man.vxlan.4; driver has been added,
1032 which creates a virtual Layer 2 (Ethernet) network overlaid in
1033 a Layer 3 (IP/UDP) network. The &man.vxlan.4; driver is
1034 analogous to &man.vlan.4;, but is designed to be better suited
1035 for large, multiple-tenant datacenter environments.</para>
1037 <para revision="274246" contrib="sponsor" sponsor="&yandex;">The
1038 &man.gre.4; driver has been significantly overhauled, and has
1039 been split into two separate modules, &man.gre.4; and
1042 <para revision="278551">The &man.ral.4; driver has been updated
1043 to support the RT5390 and RT5392 chipsets.</para>
1045 <para revision="283514" contrib="sponsor"
1046 sponsor="&solarflare;">The &man.sfxge.4; driver has been
1047 updated to support Solarflare Flareon Ultra 7000-series
1050 <para revision="283766" contrib="sponsor"
1051 sponsor="&limelight;">The &man.em.4; driver has been updated
1052 with improved transmission queue hang detection.</para>
1054 <para revision="284125">The &man.cdce.4; driver has been updated
1055 to include support for the RTL8153 chipset.</para>
1059 <sect1 xml:id="hardware">
1060 <title>Hardware Support</title>
1062 <para>This section covers general hardware support for physical
1063 machines, hypervisors, and virtualization environments, as well
1064 as hardware changes and updates that do not otherwise fit in
1065 other sections of this document.</para>
1067 <sect2 xml:id="hardware-support">
1068 <title>Hardware Support</title>
1070 <para revision="268303">The &man.asmc.4; driver has been
1071 updated to support the &apple; MacMini 3,1.</para>
1073 <para revision="268351">Support for &os;/ia64 has been dropped
1074 as of &os; 11.</para>
1076 <para revision="274386">An issue that could cause a system to
1077 hang when entering <acronym>ACPI</acronym>
1078 <literal>S3</literal> state (suspend to
1079 <acronym>RAM</acronym>) has been corrected in the &man.acpi.4;
1080 and &man.pci.4; drivers.</para>
1082 <para revision="274733" arch="powerpc">The power management unit
1083 subsystem has been updated to support power button events on
1084 certain &arch.powerpc; hardware, such as aluminum
1085 PowerBook ®.</para>
1087 <para revision="275171,275190" arch="powerpc">The &man.hwpmc.4;
1088 driver has been updated to correct performance counter
1089 sampling on G4 (MPC74xxx) and G5 class processors.</para>
1091 <para revision="275732" contrib="sponsor"
1092 sponsor="&ff;,&netgate;">The
1093 <application>OpenCrypto</application> framework has been
1094 updated to include <literal>AES-ICM</literal> and
1095 <literal>AES-GCM</literal> modes, both of which have also been
1096 added to the &man.aesni.4; driver.</para>
1098 <para revision="281713" arch="powerpc">The &man.hwpmc.4;
1099 driver has been updated to support the Freescale e500
1102 <para revision="283766">The &man.ig4.4; driver has been added,
1103 providing support for the fourth generation &intel;
1104 <acronym>I2C</acronym> SMBus.</para>
1106 <para>The &man.uart.4; driver has been updated to support
1107 <acronym>AMT</acronym> devices on newer systems.</para>
1110 <sect2 xml:id="hardware-virtualization">
1111 <title>Virtualization Support</title>
1113 <para revision="260410">Support for the <quote>Virtual Interrupt
1114 Delivery</quote> feature of &intel; VT-x is enabled if
1115 supported by the CPU. This feature can be disabled by running
1116 <literal>sysctl hw.vmm.vmx.use_apic_vid=0</literal>.
1117 Additionally, to persist this setting across reboots, add
1118 <literal>hw.vmm.vmx.use_apic_vid=0</literal> to
1119 <filename>/etc/sysctl.conf</filename>.</para>
1121 <para revision="260532">Support for <quote>Posted Interrupt
1122 Processing</quote> is enabled if supported by the CPU. This
1123 feature can be disabled by running <literal>sysctl
1124 hw.vmm.vmx.use_apic_pir=0</literal>. Additionally, to
1125 persist this setting across reboots, add
1126 <literal>hw.vmm.vmx.use_apic_pir=0</literal> to
1127 <filename>/etc/sysctl.conf</filename>.</para>
1129 <para revision="260582">Unmapped IO support has been added to
1130 &man.virtio_blk.4;.</para>
1132 <para revision="260583">Unmapped IO support has been added to
1133 &man.virtio_scsi.4;.</para>
1135 <para revision="260847">The &man.virtio_random.4; driver has
1136 been added to harvest entropy from the host system.</para>
1138 <para revision="261504">&os;/&arch.i386; guests can be run under
1141 <para revision="267536" contrib="sponsor"
1142 sponsor="&citrix.rd;">Support for running a &os;/&arch.amd64;
1143 <application>Xen</application> guest instance as
1144 <acronym>PVH</acronym> guest has been added.
1145 <acronym>PVH</acronym> mode, short for <quote>Para-Virtualized
1146 Hardware</quote>, uses para-virtualized drivers for boot and
1147 I/O, and uses hardware virtualization extensions for all other
1148 tasks, without the need for emulation.</para>
1150 <para revision="273375">The &man.bhyve.8; hypervisor has been
1151 updated to support &amd; processors with
1152 <acronym>SVM</acronym> and <acronym>AMD-V</acronym> hardware
1155 <para revision="273515">The &man.virtio.console.4; driver has
1156 been added, which provides an interface to VirtIO console
1157 devices through a &man.tty.4; device.</para>
1159 <para revision="279957">The &man.bhyve.8; hypervisor has been
1160 updated to support <literal>DSM TRIM</literal> commands for
1161 virtual <acronym>AHCI</acronym> disks.</para>
1163 <para revision="281439" arch="arm">Support for the
1164 <application>QEMU</application> <literal>virt</literal> system
1165 has been added.</para>
1167 <para revision="282212" contrib="sponsor" sponsor="&msostc;">The
1168 Hyper-V™ drivers have been updated with several
1169 enhancements:</para>
1173 <para>The &man.hv.vmbus.4; driver now has multi-channel
1178 <para>The &man.hv.storvsc.4; driver now has scatter/gather
1179 support, in addition to performance improvements.</para>
1183 <para>The &man.hv.kvp.4; driver has received several bug
1188 <para revision="282274">Support for &man.xen.4; para-virtualized
1189 <literal>domU</literal> kernels has been removed.</para>
1191 <para revision="284746" contrib="sponsor" sponsor="&msostc;">The
1192 &man.hv.netvsc.4; driver has been updated to support checksum
1193 offloading and <acronym>TSO</acronym>.</para>
1196 <sect2 xml:id="hardware-arm">
1197 <title>ARM Support</title>
1199 <para revision="260921">The &man.nand.4; device is enabled for
1200 ARM devices by default.</para>
1202 <para revision="266943" arch="arm">Support for the Exynos 5420
1203 Octa system has been added.</para>
1205 <para revision="267390" arch="arm">The <acronym>SMP</acronym>
1206 option has been enabled for all Exynos 5 systems supported by
1209 <para revision="268838" arch="arm">Support for the Toradex
1210 Apalis i.MX6 development board has been added.</para>
1212 <para revision="273264" arch="armv6">An issue that could cause
1213 instability when detecting <acronym>SD</acronym> cards on the
1214 Raspberry Pi <acronym>SOC</acronym> has been fixed.</para>
1216 <para revision="275963">The <literal>bcm2835_cpufreq</literal>
1217 driver has been added, which supports <acronym>CPU</acronym>
1218 frequency and voltage control on the Raspberry Pi
1219 <acronym>SOC</acronym>.</para>
1221 <para revision="277042" arch="arm">Support to turn off the
1222 BeagleBone Black system with the &man.shutdown.8;
1223 <literal>-p</literal> flag or by invoking &man.poweroff.8; has
1226 <para revision="277644" arch="arm">Audio transmission drivers
1227 have been added for Digital Audio Multiplexer
1228 (<acronym>AUDMUXM</acronym>), Smart Direct Memory Access
1229 Controller (<acronym>SDMA</acronym>), and Syncronous Serial
1230 Interface (<acronym>SSI</acronym>).</para>
1232 <para revision="280259" contrib="sponsor" sponsor="&ff;">Initial
1233 support for the ARM AArch64 architecture has been
1236 <para revision="282779" arch="arm">Kernel support for Thumb-2
1237 userland has been added.</para>
1239 <para revision="282827">Support for the hardware power button
1240 on the BeagleBone Black system has been added.</para>
1242 <para revision="284273" contrib="sponsor"
1243 sponsor="&ff;">Initial
1244 <acronym>ACPI</acronym> support has been added for
1245 &os;/&arch.arm64;.</para>
1249 <sect1 xml:id="storage">
1250 <title>Storage</title>
1252 <para>This section covers changes and additions to file systems
1253 and other storage subsystems, both local and networked.</para>
1255 <sect2 xml:id="storage-general">
1256 <title>General Storage</title>
1258 <para revision="278037" contrib="sponsor" sponsor="&ix;">The
1259 &man.ctl.4; <acronym>LUN</acronym> mapping has been rewritten,
1260 replacing <acronym>iSCSI</acronym>-specific mapping mechanisms
1261 with a new mechanism that works for any port.</para>
1263 <para revision="278354" contrib="sponsor" sponsor="&ix;">The
1264 &man.ctld.8; utility has been updated to allow controlling
1265 non-<acronym>iSCSI</acronym> &man.ctl.4; ports.</para>
1267 <para revision="275681" contrib="sponsor" sponsor="&ff;">The
1268 &man.autofs.5; subsystem has been updated to include a new
1269 &man.auto.master.5; map, <literal>-media</literal>, which
1270 allows automatically mounting removable media, such as
1271 <acronym>CD</acronym> drives or <acronym>USB</acronym> flash
1274 <para revision="279955" contrib="sponsor" sponsor="&ff;">The
1275 &man.autofs.5; subsystem has been updated to include a new
1276 &man.auto.master.5; map, <literal>-noauto</literal>, which
1277 handles &man.fstab.5; entries set to
1278 <literal>noauto</literal>.</para>
1281 <sect2 xml:id="storage-net">
1282 <title>Networked Storage</title>
1284 <para revision="270096" contrib="sponsor" sponsor="&ff;">The new
1285 filesystem automount facility, &man.autofs.5;, has been added.
1286 The new &man.autofs.5; facility is similar to that found in
1287 other &unix;-like operating systems, such as OS X™
1288 and Solaris™. The &man.autofs.5; facility uses
1289 a &sun;-compatible &man.auto.master.5; configuration file, and
1290 is administered with the &man.automount.8; userland utility,
1291 and the &man.automountd.8; and &man.autounmountd.8;
1294 <para revision="273849" contrib="sponsor" sponsor="&ff;">Support
1295 for the <literal>timeo</literal>, <literal>actimeo</literal>,
1296 <literal>noac</literal>, and <literal>proto</literal> options
1297 have been added to &man.mount.nfs.8;.</para>
1300 <sect2 xml:id="storage-zfs">
1303 <para revision="275748">The <literal>arc_meta_limit</literal>
1304 statistics are now visible through the
1305 <literal>kstat</literal> &man.sysctl.8;. As a result of this
1306 change, the <literal>vfs.zfs.arc_meta_used</literal>
1307 &man.sysctl.8; has been removed, and replaced with the
1308 <literal>kstat.zfs.misc.arcstats.arc_meta_used</literal>
1309 &man.sysctl.8;.</para>
1312 <sect2 xml:id="storage-geom">
1313 <title>&man.geom.4;</title>
1315 <para revision="267359">Support for the
1316 <literal>disklabel64</literal> partitioning scheme has been
1317 added to &man.gpart.8;.</para>
1319 <para revision="282465">Support for the
1320 <literal>apple-boot</literal>, <literal>apple-hfs</literal>,
1321 and <literal>apple-ufs</literal> <acronym>MBR</acronym>
1322 partitioning schemes have been added to &man.gpart.8;.</para>
1326 <sect1 xml:id="boot">
1327 <title>Boot Loader Changes</title>
1329 <para>This section covers the boot loader, boot menu, and other
1330 boot-related changes.</para>
1332 <sect2 xml:id="boot-loader">
1333 <title>Boot Loader Changes</title>
1335 <para revision="258431" contrib="sponsor" sponsor="&ff;">The
1336 memory test run at boot time on &os;/&arch.amd64; platforms
1337 has been disabled by default.</para>
1339 <para revision="262955">A new &man.ttys.5; class,
1340 <literal>3wire</literal>, has been added. This is similar to
1341 the existing terminal classes, but does not have a defined
1344 <para revision="274085">The &man.vt.4; driver has been made the
1345 default system console driver. The &man.syscons.4; driver is
1346 still available, and can be enabled by adding
1347 <literal>kern.vty=sc</literal> in &man.loader.conf.5;.
1348 Alternatively, &man.syscons.4; can be enabled at boot time by
1349 entering <literal>set kern.vty=sc</literal> at the
1350 &man.loader.8; prompt.</para>
1352 <para revision="279950">Support for <literal>bzipfs</literal>
1353 has been added to the <acronym>EFI</acronym> loader.</para>
1355 <para revision="281616">The boot loader has been updated to
1356 support entering the <acronym>GELI</acronym> passphrase before
1357 loading the kernel. To enable this behavior, add
1358 <literal>geom_eli_passphrase_prompt="YES"</literal> to
1359 &man.loader.conf.5;.</para>
1361 <para revision="284683" contrib="sponsor" sponsor="&ff;"
1362 arch="arm">The &man.ttys.5; file for &os;/&arch.arm; has been
1363 updated to enable <filename>ttyu1</filename>,
1364 <filename>ttyu2</filename>, and <filename>ttyu3</filename> by
1365 default, if the callin port is an active console port.</para>
1368 <sect2 xml:id="boot-menu">
1369 <title>Boot Menu Changes</title>
1375 <sect1 xml:id="network">
1376 <title>Networking</title>
1378 <para>This section describes changes that affect networking in
1381 <sect2 xml:id="network-protocols">
1382 <title>Network Procols</title>
1384 <para revision="263140">Support for the IPX network transport
1385 protocol has been removed, and will not be supported in
1386 &os; 11 and later releases.</para>
1388 <para revision="272720" contrib="sponsor"
1389 sponsor="&limelight;">Support for <acronym>PLPMTUD</acronym>
1390 blackhole detection (<acronym>RFC</acronym> 4821) has been
1391 added to the &man.tcp.4; stack, disabled by default. New
1392 control tunables have been added:</para>
1394 <informaltable frame="none" pgwide="0">
1396 <colspec colwidth="1*"/>
1397 <colspec colwidth="1*"/>
1400 <entry>Tunable</entry>
1401 <entry>Description</entry>
1407 <entry><literal>net.inet.tcp.pmtud_blackhole_detection</literal></entry>
1408 <entry>Enables or disables <acronym>PLPMTUD</acronym>
1409 blackhole detection</entry>
1413 <entry><literal>net.inet.tcp.pmtud_blackhole_mss</literal></entry>
1414 <entry><acronym>MSS</acronym> to try for IPv4</entry>
1418 <entry><literal>net.inet.tcp.v6pmtud_blackhole_mss</literal></entry>
1419 <entry><acronym>MSS to try for IPv6</acronym></entry>
1425 <para>New monitoring &man.sysctl.8;s haven been added:</para>
1427 <informaltable frame="none" pgwide="0">
1429 <colspec colwidth="1*"/>
1430 <colspec colwidth="1*"/>
1433 <entry>Tunable</entry>
1434 <entry>Description</entry>
1440 <entry><literal>net.inet.tcp.pmtud_blackhole_activated</literal></entry>
1441 <entry>Number of times the code was activated to attempt
1442 downshifting the <acronym>MSS</acronym></entry>
1446 <entry><literal>net.inet.tcp.pmtud_blackhole_min_activated</literal></entry>
1447 <entry>Number of times the blackhole
1448 <acronym>MSS</acronym> was used in an attempt to
1453 <entry><literal>net.inet.tcp.pmtud_blackhole_failed</literal></entry>
1454 <entry>Number of times that the blackhole failed to
1455 connect after downshifting the
1456 <acronym>MSS</acronym></entry>
1462 <para revision="280971" contrib="sponsor"
1463 sponsor="&netflix;, &nginx;">Support for <acronym>IP</acronym>
1464 identification for atomic datagrams (<acronym>RFC</acronym>
1465 6864) has been added. Support for this feature can be toggled
1466 with the <literal>net.inet.ip.rfc6864</literal>
1467 &man.sysctl.8;, which is enabled by default.</para>
1471 <sect1 xml:id="ports">
1472 <title>Ports Collection and Package Infrastructure</title>
1474 <para>This section covers changes to the &os; Ports
1475 Collection, package infrastructure, and package maintenance and
1476 installation tools.</para>
1478 <sect2 xml:id="ports-infrastructure">
1479 <title>Infrastructure Changes</title>
1484 <sect2 xml:id="ports-packages ">
1485 <title>Packaging Changes</title>
1491 <sect1 xml:id="doc">
1492 <title>Documentation</title>
1494 <para>This section covers changes to the &os; Documentation
1495 Project sources and toolchain.</para>
1497 <sect2 xml:id="doc-sources">
1498 <title>Documentation Source Changes</title>
1503 <sect2 xml:id="doc-toolchain">
1504 <title>Documentation Toolchain Changes</title>
1510 <sect1 xml:id="releng">
1511 <title>Release Engineering and Integration</title>
1513 <para>This section convers changes that are specific to the
1514 &os; Release Engineering processes.</para>
1516 <sect2 xml:id="releng-changes">
1517 <title>Integration Changes</title>
1519 <para revision="277458" contrib="sponsor" sponsor="&ff;">The
1520 Release Engineering build tools have been updated to include
1521 support for producing virtual machine disk images for various
1522 cloud hosting providers.</para>
1524 <para revision="278926">The Release Engineering build tools have
1525 been updated to use multi-threaded &man.xz.1;. By default,
1526 the number of &man.xz.1; threads is set to the number of cores
1529 <para revision="281802" contrib="sponsor" sponsor="&ff;">The
1530 Release Engineering build tools have been updated to include
1531 support for building &os;/&arch.arm64; virtual machine and
1532 memory stick installation images.</para>
1534 <para revision="282693" contrib="sponsor" sponsor="&ff;">The
1535 Release Engineering build tools have been updated to support
1536 building &os;/&arch.arm; images without external utilities for
1537 supported boards where a corresponding
1538 <literal>u-boot</literal> port exists in the Ports
1541 <para revision="283307" contrib="sponsor" sponsor="&ff;">The
1542 &os;/&arch.i386; memory stick installation images are now
1543 created using the &man.mkimg.1; utility, matching the way
1544 the &os;/&arch.amd64; images are created.</para>