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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;
396 <sect2 xml:id="userland-contrib">
397 <title>Contributed Software</title>
399 <para revision="258884" contrib="sponsor"
400 sponsor="&darpa_afrl;">&man.lldb.1; has been updated to
401 upstream snapshot version r196259.</para>
403 <para revision="260445">&man.byacc.1; has been updated to
404 version 20140101.</para>
406 <para revision="261071">&man.jemalloc.3; has been updated to
407 version 3.5.0.</para>
409 <para revision="261283"><application>libc++</application> has
410 been updated to version 3.4.</para>
412 <para revision="261320"><application>OpenSSH</application> has
413 been updated to 6.5p1.</para>
415 <para revision="261344"><application>mdocml</application> has
416 been updated to version 1.12.3.</para>
418 <para revision="261991"><application>LLVM</application> and
419 <application>Clang</application> have been updated to
422 <para revision="275718">The <application>binutils</application>
423 suite of utilities has been updated to include upstream
424 patches that add new relocations for &arch.powerpc;
427 <para revision="276398" contrib="sponsor" sponsor="&ff;">The
428 <application>ELF Tool Chain</application> has been updated to
429 upstream revision r3136.</para>
431 <para revision="276551">The <application>texinfo</application>
432 utility and <literal>info</literal> pages were removed from
433 the base system. The <filename
434 role="package">print/texinfo</filename> port should be
435 installed on systems where <literal>info</literal> pages are
438 <para revision="276796" contrib="sponsor" sponsor="&ff;">The ELF
439 object manipulation tools
440 <application>addr2line</application>,
441 <application>elfcopy (strip)</application>,
442 <application>nm</application>,
443 <application>readelf</application>,
444 <application>size</application>, and
445 <application>strings</application> were switched to the
446 versions from the ELF Tool Chain project.</para>
448 <para revision="276881">The <literal>libedit</literal> library
449 has been updated to include <acronym>UTF-8</acronym> support,
450 adding <acronym>UTF-8</acronym> support to the &man.sh.1;
453 <para revision="278433">The &man.xz.1; utility has been updated
454 to support multi-threaded compression.</para>
456 <para revision="280932" contrib="sponsor" sponsor="&ff;">The
457 <application>elftoolchain</application> utilities have been
458 updated to version 3179.</para>
460 <para revision="281316">The &man.xz.1; utility has been updated
461 to version 5.2.1.</para>
463 <para revision="281373">The &man.nvi.1; utility has been updated
464 to version 2.1.3.</para>
466 <para revision="281806">The &man.wpa.supplicant.8; and
467 &man.hostapd.8; utilities have been updated to version
470 <para revision="282089">The &man.unbound.8; utility has been
471 updated to version 1.5.3.</para>
473 <para revision="282434" contrib="sponsor" sponsor="&ff;">The
474 &man.resolvconf.8; utility has been updated to version
477 <para revision="282613">The &man.nc.1; utility has been updated
478 to the OpenBSD 5.7 version.</para>
480 <para revision="283092">The &man.acpi.4; subsystem has been
481 updated to version 20150515.</para>
483 <para revision="284237">The &man.file.1; utility has been
484 updated to version 5.23.</para>
486 <para revision="284254"><application>bmake</application> has
487 been updated to version 20150606.</para>
489 <para revision="284397">Timezone data files have been updated to
490 version 2015e.</para>
492 <para revision="285229"><application>sendmail</application> has
493 been updated to 8.15.2. Starting with &os; 11.0 and
494 sendmail 8.15, sendmail uses uncompressed IPv6 addresses by
495 default, i.e., they will not contain <quote>::</quote>. For
496 example, instead of <quote>::1</quote>, it will be
497 <quote>0:0:0:0:0:0:0:1</quote>. This permits a zero subnet to
498 have a more specific match, such as different map entries for
499 IPv6:0:0 versus IPv6:0. This change requires that
500 configuration data (including maps, files, classes, custom
501 ruleset, etc.) must use the same format, so make certain such
502 configuration data is upgrading. As a very simple check
503 search for patterns like 'IPv6:[0-9a-fA-F:]*::' and 'IPv6::'.
504 To return to the old behavior, set the m4 option
505 <literal>confUSE_COMPRESSED_IPV6_ADDRESSES</literal> or the cf
506 option <literal>UseCompressedIPv6Addresses</literal>.</para>
508 <para revision="285329"><application>OpenSSL</application> has
509 been updated to version 1.0.1p.</para>
512 <sect2 xml:id="userland-installer">
513 <title>Installation and Configuration Tools</title>
515 <para revision="271539">The &man.bsdinstall.8; partition editor
516 and &man.sade.8; utility have been updated to include native
517 <acronym>ZFS</acronym> support.</para>
519 <para revision="272274">The &os; installation utility,
520 &man.bsdinstall.8;, has been updated to set the
521 <literal>canmount</literal> &man.zfs.8; property to
522 <literal>off</literal> for the <filename
523 class="directory">/var</filename> dataset, preventing the
524 contents of directories within <filename
525 class="directory">/var</filename> from conflicting when
526 using multiple boot environments, such as that provided by
527 <filename role="package">sysutils/beadm</filename>.</para>
529 <para revision="274394">The &man.bsdconfig.8; utility has been
530 updated to skip the initial &man.tzsetup.8;
531 <acronym>UTC</acronym> versus wall-clock time prompt when run
532 in a virtual machine, determined when the
533 <literal>kern.vm_guest</literal> &man.sysctl.8; is set to
534 <literal>1</literal>.</para>
536 <para revision="275874">The &man.bsdinstall.8; utility has been
537 updated to use the new &man.dpv.3; library to display progress
538 when extracting the &os; distributions.</para>
541 <sect2 xml:id="userland-rc">
542 <title><filename class="directory">/etc/rc.d</filename>
545 <para revision="270676">The &man.rc.8; subsystem has been
546 updated to allow configuring services in <filename
547 class="directory">${LOCALBASE}/etc/rc.conf.d/</filename>.
548 If <literal>LOCALBASE</literal> is unset, it defaults to
549 <filename class="directory">/usr/local</filename>.</para>
551 <para revision="273955">A new &man.rc.8; script,
552 <filename>growfs</filename>, has been added, which will resize
553 the root filesystem on boot if <filename>/firstboot</filename>
556 <para revision="275299">The <filename>mrouted</filename>
557 &man.rc.8; script has been removed from the base system. An
558 equivalent script is available from the <filename
559 role="package">net/mrouted</filename> port.</para>
561 <para revision="279463" contrib="sponsor"
562 sponsor="&sandvine;">A new &man.rc.8; script,
563 <filename>iovctl</filename>, has been added, which allows
564 automatically starting the &man.iovctl.8; utility at
568 <sect2 xml:id="userland-periodic">
569 <title><filename class="directory">/etc/periodic</filename>
572 <para revision="271321">The daily &man.periodic.8; script
573 <filename>110.clean-tmps</filename> has been updated to avoid
574 crossing filesystem mount boundaries when cleaning files in
575 <filename class="directory">/tmp</filename>.</para>
577 <para revision="277216" contrib="sponsor" sponsor="&ff;">A new
578 &man.periodic.8; script,
579 <filename>510.status-world-kernel</filename>, has been added,
580 which evaluates the running userland and kernel versions from
581 the &man.uname.1; <literal>-U</literal> and
582 <literal>-K</literal> arguments, and prints an error if the
583 system userland and kernel are not in sync.</para>
586 <sect2 xml:id="userland-libraries">
587 <title>Runtime Libraries and API</title>
589 <para revision="265995">The Blowfish &man.crypt.3; default
590 format has been changed to
591 <literal>$2b$</literal>.</para>
593 <para revision="268461">The &man.readline.3; library is now
594 statically linked in software within the base system, and the
595 shared library is no longer installed, allowing the Ports
596 Collection to use a modern version of the library.</para>
598 <para revision="272273">The &man.strptime.3; library has been
599 updated to add support for <acronym>POSIX</acronym>-2001
600 features <literal>%U</literal> and
601 <literal>%W</literal>.</para>
603 <para revision="272842,272848" contrib="sponsor"
604 sponsor="&ff;">The &man.dl.iterate.phdr.3; library has been
605 changed to always return the path name of the
606 <acronym>ELF</acronym> object in the
607 <literal>dlpi_name</literal> structure member.</para>
609 <para revision="273562" contrib="sponsor"
610 sponsor="&juniper;">The &man.libxo.3; library has been
611 imported to the base system.</para>
613 <para revision="273806" contrib="sponsor" sponsor="&chelsio;">A
614 userland library for Chelsio Terminator 5 based iWARP cards
615 has been added, allowing userland <acronym>RDMA</acronym>
616 applications to work over compatible
617 <acronym>NIC</acronym>s.</para>
619 <para revision="274987">The &man.gpio.3; library has been added,
620 providing a wrapper around the &man.gpio.4; kernel
623 <para revision="275800" contrib="sponsor" sponsor="&ff;">The
624 &man.procctl.2; system call has been updated to include
625 a facility for non-&man.init.8; processes to be declared as
626 the reaper of child processes and their decendants.</para>
628 <para revision="277610">The <literal>futimens()</literal> and
629 <literal>utimensat()</literal> system calls have been
630 added. See &man.utimensat.2; for more information.</para>
632 <para revision="278934">The &man.elf.3; compile-time dependency
633 has been removed from <filename>dtri.o</filename>, which
634 allows adding <application>DTrace</application> probes to
635 userland applications and libraries without also linking
636 against &man.elf.3;.</para>
638 <para revision="279186">The &man.setmode.3; function has been
639 updated to consistently set <literal>errno</literal> on
642 <para revision="279663">The &man.qsort.3; functions have been
643 updated to be able to handle 32-bit aligned data on 64-bit
644 platforms, also providing a significant improvement in 32-bit
647 <para revision="281130">Several standard include headers have
648 been updated to use of <application>gcc</application>
649 attributes, such as <literal>__result_use_check()</literal>,
650 <literal>__alloc_size()</literal>, and
651 <literal>__nonnull()</literal>.</para>
653 <para revision="281845">Support for file verification in
654 <acronym>MAC</acronym> has been added.</para>
656 <para revision="282973" contrib="sponsor" sponsor="&ff;">The
657 <literal>libgomp</literal> library is now only built when
658 building <acronym>GCC</acronym> from the base system. An
659 up-to-date version is available in the Ports Collection as
661 role="package">devel/libiomp5-devel</filename>.</para>
663 <para revision="282988">The <filename>stdlib.h</filename> and
664 <filename>malloc.h</filename> headers have been updated to
665 make use of the <application>gcc</application>
666 <literal>alloc_align()</literal> attribute.</para>
668 <para revision="284483" contrib="sponsor"
669 sponsor="&scaleengine;">The Blowfish &man.crypt.3; library
670 has been updated to support $2y$ hashes.</para>
673 <sect2 xml:id="userland-abi">
674 <title>ABI Compatibility</title>
676 <para revision="271982">The &linux; compatibility version has
677 been updated to <literal>2.6.18</literal>. The
678 <literal>compat.linux.osrelease</literal> &man.sysctl.8; is
679 evaluated when building the <filename
680 role="package">emulators/linux-c6</filename> and related
685 <sect1 xml:id="kernel">
686 <title>Kernel</title>
688 <para>This section covers changes to kernel configurations, system
689 tuning, and system control parameters that are not otherwise
692 <sect2 xml:id="kernel-bugfix">
693 <title>Kernel Bug Fixes</title>
695 <para revision="265876">A kernel bug that inhibited proper
696 functionality of the <literal>dev.cpu.0.freq</literal>
697 &man.sysctl.8; on &intel; processors with Turbo
698 Boost ™ enabled has been fixed.</para>
700 <para revision="271697" arch="powerpc">Support for
701 &man.dtrace.1; stack tracing has been fixed for
702 &os;/&arch.powerpc;, using the <literal>trapexit()</literal>
703 and <literal>asttrapexit()</literal> functions instead of
704 checking within addressed kernel space.</para>
706 <para revision="271917">A kernel panic triggered when destroying
707 a &man.vnet.9; &man.jail.8; configured with &man.gif.4; has
710 <para revision="271918">A kernel panic triggered when destroying
711 a &man.vnet.9; &man.jail.8; configured with &man.gre.4; has
714 <para revision="272089">A bug in &man.ipfw.4; that could
715 potentially lead to a kernel panic when using &man.dummynet.4;
716 at layer 2 has been fixed.</para>
718 <para revision="280930" contrib="sponsor" sponsor="&mitail;">The
719 kernel <acronym>RPC</acronym> has been updated to include
720 several enhancements:</para>
724 <para>The 45 MiB limit on requests queued for
725 &man.nfsd.8; threads has been removed.</para>
729 <para>Avoids unnecessary throttling by not deferring
730 accounting for completed requests.</para>
734 <para>Fixes an integer overflow and signedness bugs.</para>
738 <para revision="281261" arch="powerpc">Support for
739 &man.dtrace.1; has been added for the
740 Book-E ™.</para>
743 <sect2 xml:id="kernel-config">
744 <title>Kernel Configuration</title>
746 <para revision="266531">The <literal>IMAGACT_BINMISC</literal>
747 kernel configuration option has been enabled by default,
748 which enables application execution through emulators, such
749 as <application>Qemu</application>.</para>
751 <para revision="268045">The <literal>VT</literal> kernel
752 configuration file has been removed, and the &man.vt.4;
753 driver is included in the <literal>GENERIC</literal> kernel.
754 To enable &man.vt.4;, enter <literal>set kern.vty=vt</literal>
755 at the &man.loader.8; prompt during boot, or add
756 <literal>kern.vty=vt</literal> to &man.loader.conf.5; and
757 reboot the system.</para>
759 <para revision="277904">The &man.config.8; utility has been
760 updated to allow using a non-standard <filename
761 class="directory">src/</filename> tree, specified as an
762 argument to the <literal>-s</literal> flag.</para>
764 <para revision="277990" arch="powerpc64">The
765 &os;/&arch.powerpc64; kernel now builds as
766 a position-independent executable, allowing the kernel to be
767 loaded into and run from any physical or virtual
771 <para>This change requires an update to &man.loader.8;.
772 The userland and kernel must be updated before rebooting the
776 <para revision="278338" arch="arm">A new module for creating
777 <filename>rpi.dtb</filename> has been added for the Raspberry
780 <para revision="279189" contrib="sponsor" sponsor="&ff;"
781 arch="powerpc">Kernel support for Vector-Scalar eXtension
782 (<acronym>VSX</acronym>) found on POWER7 and POWER8 hardware
783 has been added.</para>
785 <para revision="279252" contrib="sponsor" sponsor="&ff;"
786 arch="powerpc">The &man.pmap.9; implementation for 64-bit
787 &powerpc; processors has been overhaulded to improve
790 <para revision="281495" contrib="sponsor" sponsor="&ff;">The
791 <literal>PAE_TABLES</literal> kernel configuration option has
792 been added for &os;/&arch.i386;, which instructs &man.pmap.9;
793 to use <acronym>PAE</acronym> format for page tables.</para>
795 <para revision="282215">The <literal>SIFTR</literal> kernel
796 configuration has been added, allowing building &man.siftr.4;
797 statically into the kernel.</para>
799 <para revision="282727">Support for booting relocatable kernels
800 has been extended to non-<acronym>EFI</acronym>
803 <para revision="282731" arch="arm">The &arch.arm; boot loader,
804 <filename>ubldr</filename>, is now relocatable. In addition,
805 <filename>ubldr.bin</filename> is now created during build
806 time, which is a stripped binary with an entry point of
807 <literal>0</literal>, providing the ability to specify the
808 load address by running <literal>go
809 ${loadaddr}</literal> in
810 <literal>u-boot</literal>.</para>
812 <para revision="282921" contrib="sponsor" sponsor="&intelcorp;"
813 arch="amd64,i386">The &man.nvd.4; and &man.nvme.4; drivers are
814 now included in the <filename>GENERIC</filename> kernel
815 configuration by default.</para>
817 <para revision="283959" contrib="sponsor"
818 sponsor="&limelight;">A new kernel configuration option,
819 <literal>EM_MULTIQUEUE</literal>, has been added which enables
820 multi-queue support in the &man.em.4; driver.</para>
823 <para>Multi-queue support in the &man.em.4; driver is not
824 officially supported by &intel;.</para>
828 <sect2 xml:id="kernel-sysctl">
829 <title>System Tuning and Controls</title>
831 <para revision="275140" contrib="sponsor" sponsor="&ff;">The
832 &man.hwpmc.4; default and maximum callchain depths have been
833 increased. The default has been increased from 16 to 32, and
834 the maximum increased from 32 to 128.</para>
836 <para revision="279361">The <literal>kern.osrelease</literal>
837 and <literal>kern.osreldate</literal> are now configurable
838 &man.jail.8; parameters.</para>
840 <para revision="280308,280949" contrib="sponsor"
841 sponsor="&ix;, &ff;">The &man.devfs.5; device filesystem has
842 been changed to update timestamps for read/write operations
843 using seconds precision. A new &man.sysctl.8;,
844 <literal>vfs.devfs.dotimes</literal> has been added, which
845 when set to a non-zero value, enables default precision
846 timestamps for these operations.</para>
848 <para revision="282213" contrib="sponsor" sponsor="&ff;">A new
849 &man.sysctl.8;, <literal>kern.racct.enable</literal>, has been
850 added, which when set to a non-zero value allows using
851 &man.rctl.8; with the <literal>GENERIC</literal> kernel.
852 A new kernel configuration option,
853 <literal>RACCT_DISABLED</literal> has also been added.</para>
855 <para revision="282901" contrib="sponsor" sponsor="&ff;">The
856 <literal>GENERIC</literal> kernel configuration now includes
857 <literal>RACCT</literal> and <literal>RCTL</literal> by
861 <para>To enable <literal>RACCT</literal> and
862 <literal>RCTL</literal> on a system using the
863 <literal>GENERIC</literal> kernel configuration, add
864 <literal>kern.racct.enable=1</literal> to
865 &man.loader.conf.5;, and reboot the system.</para>
868 <para revision="283136" contrib="sponsor"
869 sponsor="&limelight;">A new &man.sysctl.8;,
870 <literal>net.inet.tcp.hostcache.purgenow</literal>, has
871 been added, which when set to <literal>1</literal> during
872 runtime will flush all
873 <literal>net.inet.tcp.hostcache</literal> entries.</para>
877 <sect1 xml:id="drivers">
878 <title>Devices and Drivers</title>
880 <para>This section covers changes and additions to devices and
881 device drivers since &release.prev;.</para>
883 <sect2 xml:id="drivers-device">
884 <title>Device Drivers</title>
886 <para revision="260903">Support for GPS ports has been added to
889 <para revision="265132">The &man.full.4; device has been added,
890 and the <literal>lindev(4)</literal> device has been removed.
891 Prior to this change, <literal>lindev(4)</literal> provided
892 only the <filename>/dev/full</filename> character device,
893 returning <literal>ENOSPC</literal> on write attempts. As
894 this device is not specific to &linux;, a native &os; version
895 has been added.</para>
897 <para revision="271705">Hardware context support has been
898 added to the <literal>drm/i915</literal> driver, adding
899 support for <application>Mesa</application> 9.2 and
902 <para revision="273178">The &man.vt.4; driver has been updated,
903 replacing the bitmapped <literal>kern.vt.spclkeys</literal>
904 &man.sysctl.8; with individual
905 <literal>kern.vt.kbd_*</literal> variants.</para>
907 <para revision="273598">The &man.hpet.4; driver has been updated
909 <filename>/dev/hpet<replaceable>N</replaceable></filename>
910 device, providing access to <acronym>HPET</acronym> from
913 <para revision="280183">The <literal>drm</literal> code has
914 been updated to match &linux; version 3.8.13.</para>
916 <para revision="281440">The &man.psm.4; driver has been updated
917 to include improved support for newer Synaptics ®
918 touchpads and the ClickPad ® mouse on newer
919 Lenovo ™ laptops.</para>
921 <para revision="282783" arch="powerpc">Support for the Freescale
922 <acronym>PCI</acronym> Root Complex device has been
926 <sect2 xml:id="drivers-storage">
927 <title>Storage Drivers</title>
929 <para revision="265236" contrib="sponsor"
930 sponsor="&lsi;, &spectralogic;" sponsorurl="">The &man.mpr.4;
931 device has been added, providing support for LSI Fusion-MPT
932 3 12Gb SCSI/SATA controllers.</para>
934 <para revision="265555" contrib="sponsor"
935 sponsor="&lsi;">The &man.mrsas.4; driver has been added,
936 providing support for LSI MegaRAID SAS controllers. The
937 &man.mfi.4; driver will attach to the controller, by default.
938 To enable &man.mrsas.4; add
939 <literal>hw.mfi.mrsas_enable=1</literal> to
940 <filename>/boot/loader.conf</filename>, which turns off
941 &man.mfi.4; device probing.</para>
944 <para>At this time, the &man.mfiutil.8; utility and the &os;
945 version of <application>MegaCLI</application> and
946 <application>StorCli</application> do not work with
947 &man.mrsas.4;.</para>
950 <para revision="275461" contrib="sponsor" sponsor="&ix;">The
951 &man.ctl.4; subsystem has been updated, increasing the ports
952 limit from <literal>128</literal> to <literal>256</literal>,
953 and <acronym>LUN</acronym> limit from <literal>256</literal>
954 to <literal>1024</literal>.</para>
956 <para revision="276526">The <literal>asr(4)</literal> driver has
957 been removed, and is no longer supported.</para>
959 <para revision="281387">The &man.hptnr.4; driver has been
960 updated to version 1.1.1.</para>
963 <sect2 xml:id="drivers-network">
964 <title>Network Drivers</title>
966 <para revision="258830">Support for Broadcom chipsets BCM57764,
967 BCM57767, BCM57782, BCM57786 and BCM57787 has been added to
970 <para revision="260448">Support for the &intel; Centrino™
971 Wireless-N 135 chipset has been added.</para>
973 <para revision="260552">Firmware for &intel; Centrino™
974 Wireless-N 105 devices has been added to the base
977 <para revision="261975">The deprecated nve(4) driver has been
978 removed. Users of NVIDIA nForce MCP network adapters are
979 advised to use the &man.nfe.4; driver instead, which has been
980 the default driver for this hardware since
981 &os; 7.0.</para>
983 <para revision="264601" contrib="sponsor"
984 sponsor="&darpa_afrl;">The <literal>if_nf10bmac(4)</literal>
985 device has been added, providing support for NetFPGA-10G
986 Embedded CPU Ethernet Core.</para>
989 <para>The <literal>if_nf10bmac(4)</literal> driver operates on
990 the FPGA, and is not suited for the PCI host
994 <para revision="265348" contrib="sponsor"
995 sponsor="&netgate;">The &man.ath.hal.4; driver has been
996 updated to support the Atheros AR1111 chipset.</para>
998 <para revision="266770">Support for the &intel; Centrino™
999 Wireless-N 105 chipset has been added.</para>
1001 <para revision="266757" contrib="sponsor"
1002 sponsor="&chelsio;">Support for the &man.cxgbe.4; Terminator
1003 5 (T5) 10G/40G cards has been added to &man.netmap.4;.</para>
1005 <para revision="272730">The &man.alc.4; driver has been updated
1006 to support AR816x and AR817x ethernet controllers.</para>
1008 <para revision="272906">The &man.pfil.9; interface default hash
1009 has been changed from <literal>Jenkins</literal> to
1010 <literal>Murmur3</literal>, providing a 3-percent performance
1011 increase in packets-per-second.</para>
1013 <para revision="273331">The &man.vxlan.4; driver has been added,
1014 which creates a virtual Layer 2 (Ethernet) network overlaid in
1015 a Layer 3 (IP/UDP) network. The &man.vxlan.4; driver is
1016 analogous to &man.vlan.4;, but is designed to be better suited
1017 for large, multiple-tenant datacenter environments.</para>
1019 <para revision="274246" contrib="sponsor" sponsor="&yandex;">The
1020 &man.gre.4; driver has been significantly overhauled, and has
1021 been split into two separate modules, &man.gre.4; and
1024 <para revision="278551">The &man.ral.4; driver has been updated
1025 to support the RT5390 and RT5392 chipsets.</para>
1027 <para revision="283514" contrib="sponsor"
1028 sponsor="&solarflare;">The &man.sfxge.4; driver has been
1029 updated to support Solarflare Flareon Ultra 7000-series
1032 <para revision="283766" contrib="sponsor"
1033 sponsor="&limelight;">The &man.em.4; driver has been updated
1034 with improved transmission queue hang detection.</para>
1036 <para revision="284125">The &man.cdce.4; driver has been updated
1037 to include support for the RTL8153 chipset.</para>
1041 <sect1 xml:id="hardware">
1042 <title>Hardware Support</title>
1044 <para>This section covers general hardware support for physical
1045 machines, hypervisors, and virtualization environments, as well
1046 as hardware changes and updates that do not otherwise fit in
1047 other sections of this document.</para>
1049 <sect2 xml:id="hardware-support">
1050 <title>Hardware Support</title>
1052 <para revision="268303">The &man.asmc.4; driver has been
1053 updated to support the &apple; MacMini 3,1.</para>
1055 <para revision="268351">Support for &os;/ia64 has been dropped
1056 as of &os; 11.</para>
1058 <para revision="274386">An issue that could cause a system to
1059 hang when entering <acronym>ACPI</acronym>
1060 <literal>S3</literal> state (suspend to
1061 <acronym>RAM</acronym>) has been corrected in the &man.acpi.4;
1062 and &man.pci.4; drivers.</para>
1064 <para revision="274733" arch="powerpc">The power management unit
1065 subsystem has been updated to support power button events on
1066 certain &arch.powerpc; hardware, such as aluminum
1067 PowerBook ®.</para>
1069 <para revision="275171,275190" arch="powerpc">The &man.hwpmc.4;
1070 driver has been updated to correct performance counter
1071 sampling on G4 (MPC74xxx) and G5 class processors.</para>
1073 <para revision="275732" contrib="sponsor"
1074 sponsor="&ff;,&netgate;">The
1075 <application>OpenCrypto</application> framework has been
1076 updated to include <literal>AES-ICM</literal> and
1077 <literal>AES-GCM</literal> modes, both of which have also been
1078 added to the &man.aesni.4; driver.</para>
1080 <para revision="281713" arch="powerpc">The &man.hwpmc.4;
1081 driver has been updated to support the Freescale e500
1084 <para revision="283766">The &man.ig4.4; driver has been added,
1085 providing support for the fourth generation &intel;
1086 <acronym>I2C</acronym> SMBus.</para>
1088 <para>The &man.uart.4; driver has been updated to support
1089 <acronym>AMT</acronym> devices on newer systems.</para>
1092 <sect2 xml:id="hardware-virtualization">
1093 <title>Virtualization Support</title>
1095 <para revision="260410">Support for the <quote>Virtual Interrupt
1096 Delivery</quote> feature of &intel; VT-x is enabled if
1097 supported by the CPU. This feature can be disabled by running
1098 <literal>sysctl hw.vmm.vmx.use_apic_vid=0</literal>.
1099 Additionally, to persist this setting across reboots, add
1100 <literal>hw.vmm.vmx.use_apic_vid=0</literal> to
1101 <filename>/etc/sysctl.conf</filename>.</para>
1103 <para revision="260532">Support for <quote>Posted Interrupt
1104 Processing</quote> is enabled if supported by the CPU. This
1105 feature can be disabled by running <literal>sysctl
1106 hw.vmm.vmx.use_apic_pir=0</literal>. Additionally, to
1107 persist this setting across reboots, add
1108 <literal>hw.vmm.vmx.use_apic_pir=0</literal> to
1109 <filename>/etc/sysctl.conf</filename>.</para>
1111 <para revision="260582">Unmapped IO support has been added to
1112 &man.virtio_blk.4;.</para>
1114 <para revision="260583">Unmapped IO support has been added to
1115 &man.virtio_scsi.4;.</para>
1117 <para revision="260847">The &man.virtio_random.4; driver has
1118 been added to harvest entropy from the host system.</para>
1120 <para revision="261504">&os;/&arch.i386; guests can be run under
1123 <para revision="267536" contrib="sponsor"
1124 sponsor="&citrix.rd;">Support for running a &os;/&arch.amd64;
1125 <application>Xen</application> guest instance as
1126 <acronym>PVH</acronym> guest has been added.
1127 <acronym>PVH</acronym> mode, short for <quote>Para-Virtualized
1128 Hardware</quote>, uses para-virtualized drivers for boot and
1129 I/O, and uses hardware virtualization extensions for all other
1130 tasks, without the need for emulation.</para>
1132 <para revision="273375">The &man.bhyve.8; hypervisor has been
1133 updated to support &amd; processors with
1134 <acronym>SVM</acronym> and <acronym>AMD-V</acronym> hardware
1137 <para revision="273515">The &man.virtio.console.4; driver has
1138 been added, which provides an interface to VirtIO console
1139 devices through a &man.tty.4; device.</para>
1141 <para revision="279957">The &man.bhyve.8; hypervisor has been
1142 updated to support <literal>DSM TRIM</literal> commands for
1143 virtual <acronym>AHCI</acronym> disks.</para>
1145 <para revision="281439" arch="arm">Support for the
1146 <application>QEMU</application> <literal>virt</literal> system
1147 has been added.</para>
1149 <para revision="282212" contrib="sponsor" sponsor="&msostc;">The
1150 Hyper-V™ drivers have been updated with several
1151 enhancements:</para>
1155 <para>The &man.hv.vmbus.4; driver now has multi-channel
1160 <para>The &man.hv.storvsc.4; driver now has scatter/gather
1161 support, in addition to performance improvements.</para>
1165 <para>The &man.hv.kvp.4; driver has received several bug
1170 <para revision="282274">Support for &man.xen.4; para-virtualized
1171 <literal>domU</literal> kernels has been removed.</para>
1173 <para revision="284746" contrib="sponsor" sponsor="&msostc;">The
1174 &man.hv.netvsc.4; driver has been updated to support checksum
1175 offloading and <acronym>TSO</acronym>.</para>
1178 <sect2 xml:id="hardware-arm">
1179 <title>ARM Support</title>
1181 <para revision="260921">The &man.nand.4; device is enabled for
1182 ARM devices by default.</para>
1184 <para revision="266943" arch="arm">Support for the Exynos 5420
1185 Octa system has been added.</para>
1187 <para revision="267390" arch="arm">The <acronym>SMP</acronym>
1188 option has been enabled for all Exynos 5 systems supported by
1191 <para revision="268838" arch="arm">Support for the Toradex
1192 Apalis i.MX6 development board has been added.</para>
1194 <para revision="273264" arch="armv6">An issue that could cause
1195 instability when detecting <acronym>SD</acronym> cards on the
1196 Raspberry Pi <acronym>SOC</acronym> has been fixed.</para>
1198 <para revision="275963">The <literal>bcm2835_cpufreq</literal>
1199 driver has been added, which supports <acronym>CPU</acronym>
1200 frequency and voltage control on the Raspberry Pi
1201 <acronym>SOC</acronym>.</para>
1203 <para revision="277042" arch="arm">Support to turn off the
1204 BeagleBone Black system with the &man.shutdown.8;
1205 <literal>-p</literal> flag or by invoking &man.poweroff.8; has
1208 <para revision="277644" arch="arm">Audio transmission drivers
1209 have been added for Digital Audio Multiplexer
1210 (<acronym>AUDMUXM</acronym>), Smart Direct Memory Access
1211 Controller (<acronym>SDMA</acronym>), and Syncronous Serial
1212 Interface (<acronym>SSI</acronym>).</para>
1214 <para revision="280259" contrib="sponsor" sponsor="&ff;">Initial
1215 support for the ARM AArch64 architecture has been
1218 <para revision="282779" arch="arm">Kernel support for Thumb-2
1219 userland has been added.</para>
1221 <para revision="282827">Support for the hardware power button
1222 on the BeagleBone Black system has been added.</para>
1224 <para revision="284273" contrib="sponsor"
1225 sponsor="&ff;">Initial
1226 <acronym>ACPI</acronym> support has been added for
1227 &os;/&arch.arm64;.</para>
1231 <sect1 xml:id="storage">
1232 <title>Storage</title>
1234 <para>This section covers changes and additions to file systems
1235 and other storage subsystems, both local and networked.</para>
1237 <sect2 xml:id="storage-general">
1238 <title>General Storage</title>
1240 <para revision="278037" contrib="sponsor" sponsor="&ix;">The
1241 &man.ctl.4; <acronym>LUN</acronym> mapping has been rewritten,
1242 replacing <acronym>iSCSI</acronym>-specific mapping mechanisms
1243 with a new mechanism that works for any port.</para>
1245 <para revision="278354" contrib="sponsor" sponsor="&ix;">The
1246 &man.ctld.8; utility has been updated to allow controlling
1247 non-<acronym>iSCSI</acronym> &man.ctl.4; ports.</para>
1249 <para revision="275681" contrib="sponsor" sponsor="&ff;">The
1250 &man.autofs.5; subsystem has been updated to include a new
1251 &man.auto.master.5; map, <literal>-media</literal>, which
1252 allows automatically mounting removable media, such as
1253 <acronym>CD</acronym> drives or <acronym>USB</acronym> flash
1256 <para revision="279955" contrib="sponsor" sponsor="&ff;">The
1257 &man.autofs.5; subsystem has been updated to include a new
1258 &man.auto.master.5; map, <literal>-noauto</literal>, which
1259 handles &man.fstab.5; entries set to
1260 <literal>noauto</literal>.</para>
1263 <sect2 xml:id="storage-net">
1264 <title>Networked Storage</title>
1266 <para revision="270096" contrib="sponsor" sponsor="&ff;">The new
1267 filesystem automount facility, &man.autofs.5;, has been added.
1268 The new &man.autofs.5; facility is similar to that found in
1269 other &unix;-like operating systems, such as OS X™
1270 and Solaris™. The &man.autofs.5; facility uses
1271 a &sun;-compatible &man.auto.master.5; configuration file, and
1272 is administered with the &man.automount.8; userland utility,
1273 and the &man.automountd.8; and &man.autounmountd.8;
1276 <para revision="273849" contrib="sponsor" sponsor="&ff;">Support
1277 for the <literal>timeo</literal>, <literal>actimeo</literal>,
1278 <literal>noac</literal>, and <literal>proto</literal> options
1279 have been added to &man.mount.nfs.8;.</para>
1282 <sect2 xml:id="storage-zfs">
1285 <para revision="275748">The <literal>arc_meta_limit</literal>
1286 statistics are now visible through the
1287 <literal>kstat</literal> &man.sysctl.8;. As a result of this
1288 change, the <literal>vfs.zfs.arc_meta_used</literal>
1289 &man.sysctl.8; has been removed, and replaced with the
1290 <literal>kstat.zfs.misc.arcstats.arc_meta_used</literal>
1291 &man.sysctl.8;.</para>
1294 <sect2 xml:id="storage-geom">
1295 <title>&man.geom.4;</title>
1297 <para revision="267359">Support for the
1298 <literal>disklabel64</literal> partitioning scheme has been
1299 added to &man.gpart.8;.</para>
1301 <para revision="282465">Support for the
1302 <literal>apple-boot</literal>, <literal>apple-hfs</literal>,
1303 and <literal>apple-ufs</literal> <acronym>MBR</acronym>
1304 partitioning schemes have been added to &man.gpart.8;.</para>
1308 <sect1 xml:id="boot">
1309 <title>Boot Loader Changes</title>
1311 <para>This section covers the boot loader, boot menu, and other
1312 boot-related changes.</para>
1314 <sect2 xml:id="boot-loader">
1315 <title>Boot Loader Changes</title>
1317 <para revision="258431" contrib="sponsor" sponsor="&ff;">The
1318 memory test run at boot time on &os;/&arch.amd64; platforms
1319 has been disabled by default.</para>
1321 <para revision="262955">A new &man.ttys.5; class,
1322 <literal>3wire</literal>, has been added. This is similar to
1323 the existing terminal classes, but does not have a defined
1326 <para revision="274085">The &man.vt.4; driver has been made the
1327 default system console driver. The &man.syscons.4; driver is
1328 still available, and can be enabled by adding
1329 <literal>kern.vty=sc</literal> in &man.loader.conf.5;.
1330 Alternatively, &man.syscons.4; can be enabled at boot time by
1331 entering <literal>set kern.vty=sc</literal> at the
1332 &man.loader.8; prompt.</para>
1334 <para revision="279950">Support for <literal>bzipfs</literal>
1335 has been added to the <acronym>EFI</acronym> loader.</para>
1337 <para revision="281616">The boot loader has been updated to
1338 support entering the <acronym>GELI</acronym> passphrase before
1339 loading the kernel. To enable this behavior, add
1340 <literal>geom_eli_passphrase_prompt="YES"</literal> to
1341 &man.loader.conf.5;.</para>
1343 <para revision="284683" contrib="sponsor" sponsor="&ff;"
1344 arch="arm">The &man.ttys.5; file for &os;/&arch.arm; has been
1345 updated to enable <filename>ttyu1</filename>,
1346 <filename>ttyu2</filename>, and <filename>ttyu3</filename> by
1347 default, if the callin port is an active console port.</para>
1350 <sect2 xml:id="boot-menu">
1351 <title>Boot Menu Changes</title>
1357 <sect1 xml:id="network">
1358 <title>Networking</title>
1360 <para>This section describes changes that affect networking in
1363 <sect2 xml:id="network-protocols">
1364 <title>Network Procols</title>
1366 <para revision="263140">Support for the IPX network transport
1367 protocol has been removed, and will not be supported in
1368 &os; 11 and later releases.</para>
1370 <para revision="272720" contrib="sponsor"
1371 sponsor="&limelight;">Support for <acronym>PLPMTUD</acronym>
1372 blackhole detection (<acronym>RFC</acronym> 4821) has been
1373 added to the &man.tcp.4; stack, disabled by default. New
1374 control tunables have been added:</para>
1376 <informaltable frame="none" pgwide="0">
1378 <colspec colwidth="1*"/>
1379 <colspec colwidth="1*"/>
1382 <entry>Tunable</entry>
1383 <entry>Description</entry>
1389 <entry><literal>net.inet.tcp.pmtud_blackhole_detection</literal></entry>
1390 <entry>Enables or disables <acronym>PLPMTUD</acronym>
1391 blackhole detection</entry>
1395 <entry><literal>net.inet.tcp.pmtud_blackhole_mss</literal></entry>
1396 <entry><acronym>MSS</acronym> to try for IPv4</entry>
1400 <entry><literal>net.inet.tcp.v6pmtud_blackhole_mss</literal></entry>
1401 <entry><acronym>MSS to try for IPv6</acronym></entry>
1407 <para>New monitoring &man.sysctl.8;s haven been added:</para>
1409 <informaltable frame="none" pgwide="0">
1411 <colspec colwidth="1*"/>
1412 <colspec colwidth="1*"/>
1415 <entry>Tunable</entry>
1416 <entry>Description</entry>
1422 <entry><literal>net.inet.tcp.pmtud_blackhole_activated</literal></entry>
1423 <entry>Number of times the code was activated to attempt
1424 downshifting the <acronym>MSS</acronym></entry>
1428 <entry><literal>net.inet.tcp.pmtud_blackhole_min_activated</literal></entry>
1429 <entry>Number of times the blackhole
1430 <acronym>MSS</acronym> was used in an attempt to
1435 <entry><literal>net.inet.tcp.pmtud_blackhole_failed</literal></entry>
1436 <entry>Number of times that the blackhole failed to
1437 connect after downshifting the
1438 <acronym>MSS</acronym></entry>
1444 <para revision="280971" contrib="sponsor"
1445 sponsor="&netflix;, &nginx;">Support for <acronym>IP</acronym>
1446 identification for atomic datagrams (<acronym>RFC</acronym>
1447 6864) has been added. Support for this feature can be toggled
1448 with the <literal>net.inet.ip.rfc6864</literal>
1449 &man.sysctl.8;, which is enabled by default.</para>
1453 <sect1 xml:id="ports">
1454 <title>Ports Collection and Package Infrastructure</title>
1456 <para>This section covers changes to the &os; Ports
1457 Collection, package infrastructure, and package maintenance and
1458 installation tools.</para>
1460 <sect2 xml:id="ports-infrastructure">
1461 <title>Infrastructure Changes</title>
1466 <sect2 xml:id="ports-packages ">
1467 <title>Packaging Changes</title>
1473 <sect1 xml:id="doc">
1474 <title>Documentation</title>
1476 <para>This section covers changes to the &os; Documentation
1477 Project sources and toolchain.</para>
1479 <sect2 xml:id="doc-sources">
1480 <title>Documentation Source Changes</title>
1485 <sect2 xml:id="doc-toolchain">
1486 <title>Documentation Toolchain Changes</title>
1492 <sect1 xml:id="releng">
1493 <title>Release Engineering and Integration</title>
1495 <para>This section convers changes that are specific to the
1496 &os; Release Engineering processes.</para>
1498 <sect2 xml:id="releng-changes">
1499 <title>Integration Changes</title>
1501 <para revision="277458" contrib="sponsor" sponsor="&ff;">The
1502 Release Engineering build tools have been updated to include
1503 support for producing virtual machine disk images for various
1504 cloud hosting providers.</para>
1506 <para revision="278926">The Release Engineering build tools have
1507 been updated to use multi-threaded &man.xz.1;. By default,
1508 the number of &man.xz.1; threads is set to the number of cores
1511 <para revision="281802" contrib="sponsor" sponsor="&ff;">The
1512 Release Engineering build tools have been updated to include
1513 support for building &os;/&arch.arm64; virtual machine and
1514 memory stick installation images.</para>
1516 <para revision="282693" contrib="sponsor" sponsor="&ff;">The
1517 Release Engineering build tools have been updated to support
1518 building &os;/&arch.arm; images without external utilities for
1519 supported boards where a corresponding
1520 <literal>u-boot</literal> port exists in the Ports
1523 <para revision="283307" contrib="sponsor" sponsor="&ff;">The
1524 &os;/&arch.i386; memory stick installation images are now
1525 created using the &man.mkimg.1; utility, matching the way
1526 the &os;/&arch.amd64; images are created.</para>