en_US.ISO8859-1/relnotes/article.xml

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<!ENTITY % release PUBLIC "-//FreeBSD//ENTITIES Release Specification//EN" "release.ent">
 %release;
<!ENTITY % sponsor PUBLIC "-//FreeBSD//ENTITIES Sponsor Specification//EN" "sponsor.ent">
 %sponsor;
<!ENTITY % vendor PUBLIC "-//FreeBSD//ENTITIES Vendor Specification//EN" "vendor.ent">
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<!ENTITY errata SYSTEM "../../share/xml/errata.xml">
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<article xmlns="http://docbook.org/ns/docbook"
  xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0">

  <info>
    <title>&os; &release.current; Release Notes</title>

    <author>
      <orgname>The &os; Project</orgname>
    </author>

    <pubdate>$FreeBSD: releng/10.2/release/doc/en_US.ISO8859-1/relnotes/article.xml 285962 2015-07-28 15:05:19Z gjb $</pubdate>

    <!-- Last rev: 284813 -->

    <copyright>
      <year>2015</year>
      <holder role="mailto:doc@FreeBSD.org">The &os; Documentation
	Project</holder>
    </copyright>

    <legalnotice xml:id="trademarks" role="trademarks">
      &tm-attrib.freebsd;
      &tm-attrib.ibm;
      &tm-attrib.ieee;
      &tm-attrib.intel;
      &tm-attrib.sparc;
      &tm-attrib.general;
    </legalnotice>

    <abstract>
      <para>The release notes for &os; &release.current; contain
	a summary of the changes made to the &os; base system on the
	&release.branch; development line.  This document lists
	applicable security advisories that were issued since the last
	release, as well as significant changes to the &os; kernel and
	userland.  Some brief remarks on upgrading are also
	presented.</para>
    </abstract>
  </info>

  <sect1 xml:id="intro">
    <title>Introduction</title>

    <para>This document contains the release notes for &os;
      &release.current;.  It describes recently added, changed, or
      deleted features of &os;.  It also provides some notes on
      upgrading from previous versions of &os;.</para>

    <para releasetype="current">The &release.type; distribution to
      which these release notes apply represents the latest point
      along the &release.branch; development branch since
      &release.branch; was created.  Information regarding pre-built,
      binary &release.type; distributions along this branch can be
      found at <uri
	xlink:href="&release.url;">&release.url;</uri>.</para>

    <para releasetype="snapshot">The &release.type; distribution to
      which these release notes apply represents a point along the
      &release.branch; development branch between &release.prev; and
      the future &release.next;.  Information regarding pre-built,
      binary &release.type; distributions along this branch can be
      found at <uri
	xlink:href="&release.url;">&release.url;</uri>.</para>

    <para releasetype="release">This distribution of &os;
      &release.current; is a &release.type; distribution.  It can be
      found at <uri xlink:href="&release.url;">&release.url;</uri> or
      any of its mirrors.  More information on obtaining this (or
      other) &release.type; distributions of &os; can be found in the
      <link
	xlink:href="&url.books.handbook;/mirrors.html"><quote>Obtaining
	  &os;</quote> appendix</link> to the <link
	xlink:href="&url.books.handbook;/">&os;
	Handbook</link>.</para>

    <para>All users are encouraged to consult the release errata
      before installing &os;.  The errata document is updated with
      <quote>late-breaking</quote> information discovered late in the
      release cycle or after the release.  Typically, it contains
      information on known bugs, security advisories, and corrections
      to documentation.  An up-to-date copy of the errata for &os;
      &release.current; can be found on the &os; Web site.</para>

    <para>This document describes the most user-visible new or changed
      features in &os; since &release.prev;.</para>

    <para>Typical release note items document recent security
      advisories issued after &release.prev;, new drivers or hardware
      support, new commands or options, major bug fixes, or
      contributed software upgrades.  They may also list changes to
      major ports/packages or release engineering practices.  Clearly
      the release notes cannot list every single change made to &os;
      between releases; this document focuses primarily on security
      advisories, user-visible changes, and major architectural
      improvements.</para>
  </sect1>

  <sect1 xml:id="upgrade">
    <title>Upgrading from Previous Releases of &os;</title>

    <para arch="amd64,i386">Binary upgrades between RELEASE versions
      (and snapshots of the various security branches) are supported
      using the &man.freebsd-update.8; utility.  The binary upgrade
      procedure will update unmodified userland utilities, as well as
      unmodified <filename>GENERIC</filename> kernel distributed as
      a part of an official &os; release.  The &man.freebsd-update.8;
      utility requires that the host being upgraded have Internet
      connectivity.</para>

    <para>Source-based upgrades (those based on recompiling the &os;
      base system from source code) from previous versions are
      supported, according to the instructions in
      <filename>/usr/src/UPDATING</filename>.</para>

    <important>
      <para>Upgrading &os; should only be attempted after
	backing up <emphasis>all</emphasis> data and configuration
	files.</para>
    </important>
  </sect1>

  <sect1 xml:id="security-errata">
    <title>Security and Errata</title>

    <para>This section lists the various Security Advisories and
      Errata Notices since &release.prev;.</para>

    <sect2 xml:id="security">
      <title>Security Advisories</title>

      &security;
    </sect2>

    <sect2 xml:id="errata">
      <title>Errata Notices</title>

      &errata;
    </sect2>
  </sect1>

  <sect1 xml:id="userland">
    <title>Userland</title>

    <para>This section covers changes and additions to userland
      applications, contributed software, and system utilities.</para>

    <sect2 xml:id="userland-config">
      <title>Userland Configuration Changes</title>

      <para revision="276991">The &man.termcap.5; file is installed
	as-is from sources, instead of reordering, creating
	<filename>/etc/termcap.db</filename> by default, providing
	a performance improvements to applications that use the
	&man.termcap.5; database, such as &man.vi.1; and
	&man.ncurses.3;.</para>
    </sect2>

    <sect2 xml:id="userland-programs">
      <title>Userland Application Changes</title>

      <para revision="275040">A new utility, &man.dpv.1;, has been
	added to the base system, providing a &man.dialog.1;-style
	progress view from one or more input streams.  A corresponding
	library, &man.dpv.3;, has also been added.</para>

      <para revision="275945">The &man.elfdump.1; utility has been
	updated to support capability mode provided by
	&man.capsicum.4;.</para>

      <para revision="277434" contrib="sponsor" sponsor="&ff;">The
	&man.fstyp.8; utility has been added, which is used to
	determine the filesystem on a specified device.</para>

      <para revision="278968" contrib="sponsor" sponsor="&ff;">The
	&man.mkimg.1; utility has been updated to support the
	<acronym>MBR</acronym> <acronym>EFI</acronym> partition
	type.</para>

      <para revision="281044">A regression in the &man.libarchive.3;
	library that would prevent a directory from being included in
	the archive when <literal>--one-file-system</literal> is used
	has been fixed.</para>

      <para revision="281161" contrib="sponsor"
	sponsor="&limelight;">A new flag, <literal>-R</literal>, has
	been added to the &man.netstat.8; utility, which is used to
	dump <acronym>RSS</acronym>/flow information.</para>

      <para revision="281936" contrib="sponsor" sponsor="&ff;">The
	&man.ar.1; utility has been updated to set
	<literal>ARCHIVE_EXTRACT_SECURE_SYMLINKS</literal> and
	<literal>ARCHIVE_EXTRACT_SECURE_NODOTDOT</literal> to disallow
	directory traversal when extracting an archive, similar to
	&man.tar.1;.</para>

      <para revision="282278">A race condition in &man.wc.1; that
	would cause final results to be sent to &man.stderr.4; when
	receiving the <literal>SIGINFO</literal> signal has been
	fixed.</para>

      <para revision="282870" contrib="sponsor"
	sponsor="&scaleengine;">The &man.freebsd-update.8; utility has
	been updated to prevent fetching updated binary patches when
	a previous upgrade has not been thoroughly completed.</para>

      <para revision="282974" contrib="sponsor" sponsor="&ff;">The
	&man.uefisign.8; utility has been added.</para>

      <para revision="283875" contrib="sponsor"
	sponsor="&multiplay;">The &man.chflags.1;, &man.chgrp.1;,
	&man.chmod.1;, and &man.chown.8; utilities now affect symbolic
	links when the <literal>-R</literal> flag is specified, as
	documented in &man.symlink.7;.</para>

      <para revision="283258">The &man.date.1; utility has been
	updated to print the modification time of the file passed as
	an argument to the <literal>-r</literal> flag, improving
	compatibility with the <acronym>GNU</acronym> &man.date.1;
	utility behavior.</para>

      <para revision="284523">A new flag, <literal>-c</literal>, has
	been added to the &man.mkimg.1; utility, which allows
	specifying the capacity of the target disk image.</para>

      <para revision="285092">The &man.pw.8; utility has been updated
	with a new flag, <literal>-R</literal>, that sets the root
	directory within which the utility will operate.</para>
    </sect2>

    <sect2 xml:id="userland-contrib">
      <title>Contributed Software</title>

      <para revision="282746" contrib="sponsor" sponsor="&ff;">The
	&man.resolvconf.8; utility has been updated to version
	3.7.0.</para>

      <para revision="283270">The &man.nc.1; utility has been updated
	to the OpenBSD 5.7 version.</para>

      <para revision="284398">Timezone data files have been updated to
	version 2015e.</para>

      <para revision="284460">The &man.acpi.4; subsystem has been
	updated to version 20150515.</para>

      <para revision="284778">The &man.file.1; utility has been
	updated to version 5.23.</para>

      <para revision="285206">The &man.unbound.8; utility has been
	updated to version 1.5.3.</para>

      <para revision="285305">The <application>sendmail</application>
	utility has been updated to version 8.15.2.</para>

      <para revision="285330"><application>OpenSSL</application> has
	been updated to version 1.0.1p.</para>

      <para revision="285612">The <application>ntp</application>
	suite has been updated to version 4.2.8p3.</para>

      <para revision="285750" contrib="sponsor" sponsor="&dell;">The
	&man.ssh.1; utility has been updated to re-implement hostname
	canonicalization before locating the host in
	<filename>known_hosts</filename>.</para>
    </sect2>

    <sect2 xml:id="userland-installer">
      <title>Installation and Configuration Tools</title>

      <para revision="285769" contrib="sponsor"
	sponsor="&scaleengine;">Support for detecting and implementing
	a workaround for various laptops and motherboards that do not
	boot properly from <acronym>GPT</acronym>-partitioned disks
	has been added to &man.bsdinstall.8;.  Additionally, the
	<literal>active</literal> flag will be set on the partition
	when needed.</para>

      <para revision="285721" contrib="sponsor"
	sponsor="&scaleengine;">Support for detecting and implementing
	aligning partitions on 1Mb boundaries has been added to
	&man.bsdinstall.8;.</para>

      <para revision="285769" contrib="sponsor"
	sponsor="&scaleengine;">Support for selecting the partitioning
	scheme when installing on the <acronym>UFS</acronym>
	filesystem has been added to &man.bsdinstall.8;.</para>
    </sect2>

    <sect2 xml:id="userland-rc">
      <title><filename class="directory">/etc/rc.d</filename>
	Scripts</title>

      <para revision="284009">A new &man.rc.8; script,
	<filename>growfs</filename>, has been added, which will resize
	the root filesystem on boot if <filename>/firstboot</filename>
	exists.</para>
    </sect2>

    <sect2 xml:id="userland-periodic">
      <title><filename class="directory">/etc/periodic</filename>
	Scripts</title>

      <para revision="277520" contrib="sponsor" sponsor="&ff;">A new
	&man.periodic.8; script,
	<filename>510.status-world-kernel</filename>, has been added,
	which evaluates the running userland and kernel versions from
	the &man.uname.1; <literal>-U</literal> and
	<literal>-K</literal> arguments, and prints an error if the
	system userland and kernel are not in sync.</para>
    </sect2>

    <sect2 xml:id="userland-libraries">
      <title>Runtime Libraries and API</title>

      <para revision="275040">A new file configuration library,
	&man.figpar.3;, has been added to the base system.</para>

      <para revision="276686" contrib="sponsor" sponsor="&ff;">The
	&man.procctl.2; system call has been updated to include
	a facility for non-&man.init.8; processes to be declared as
	the reaper of child processes and their decendants.</para>

      <para revision="280392">The &man.setmode.3; function has been
	updated to consistently set <literal>errno</literal> on
	failure.</para>
    </sect2>

    <sect2 xml:id="userland-abi">
      <title>ABI Compatibility</title>

      <para revision="275807">The &linux; compatibility version has
	been updated to <literal>2.6.18</literal>.  The
	<literal>compat.linux.osrelease</literal> &man.sysctl.8; is
	evaluated when building the <filename
	  role="package">emulators/linux-c6</filename> and related
	ports.</para>
    </sect2>
  </sect1>

  <sect1 xml:id="kernel">
    <title>Kernel</title>

    <para>This section covers changes to kernel configurations, system
      tuning, and system control parameters that are not otherwise
      categorized.</para>

    <sect2 xml:id="kernel-bugfix">
      <title>Kernel Bug Fixes</title>

      <para revision="276068">A kernel panic triggered when destroying
	a &man.vnet.9; &man.jail.8; configured with &man.gif.4; has
	been fixed.</para>

      <para revision="284018">A kernel panic triggered when destroying
	a &man.vnet.9; &man.jail.8; configured with &man.gre.4; has
	been fixed.</para>
    </sect2>

    <sect2 xml:id="kernel-config">
      <title>Kernel Configuration</title>

      <para revision="282065" contrib="sponsor" sponsor="&ff;">The
	<literal>PAE_TABLES</literal> kernel configuration option has
	been added for &os;/&arch.i386;, which instructs &man.pmap.9;
	to use <acronym>PAE</acronym> format for page tables while
	maintaining a 32-bit physical address size elsewhere in the
	kernel.  The use of this option can enhance application-level
	security by enabling the creation of <quote>no execute</quote>
	mappings on modern &arch.i386; processors.  Unlike the
	<literal>PAE</literal> option, <literal>PAE_TABLES</literal>
	preserves kernel binary interface (<acronym>KBI</acronym>)
	compatibility with non-<literal>PAE</literal> kernels,
	allowing non-<literal>PAE</literal> kernel modules and drivers
	to work with a <literal>PAE_TABLES</literal>-enabled kernel.
	Additionally, system limits are tuned for 4GB maximum
	<acronym>RAM</acronym>, avoiding kernel virtual address space
	(<acronym>KVA</acronym>) exhaustion.</para>

      <para revision="282826">The <literal>SIFTR</literal> kernel
	configuration has been added, allowing building &man.siftr.4;
	statically into the kernel.</para>

      <para revision="283076" contrib="sponsor" sponsor="&intelcorp;"
	arch="amd64,i386">The &man.nvd.4; and &man.nvme.4; drivers are
	now included in the <filename>GENERIC</filename> kernel
	configuration by default.</para>

      <para revision="283505" arch="arm">The &arch.arm; boot loader,
	<filename>ubldr</filename>, is now relocatable.  In addition,
	<filename>ubldr.bin</filename> is now created during build
	time, which is a stripped binary with an entry point of
	<literal>0</literal>, providing the ability to specify the
	load address by running <literal>go
	  &dollar;{loadaddr}</literal> in
	<literal>u-boot</literal>.</para>

      <para revision="284094" arch="arm">A new module for creating
	<filename>rpi.dtb</filename> has been added for the Raspberry
	Pi.</para>

      <para revision="284094" arch="arm">The
	<filename>rpi.dtb</filename> module is now installed to
	<filename class="directory">/boot/dtb/</filename> by
	default for the Raspberry Pi system.</para>

      <para revision="284096" arch="arm">A new module for creating
	the <filename>dtb</filename> module for AM335x systems has
	been added.</para>

      <para revision="284522" contrib="sponsor"
	sponsor="&limelight;">A new kernel configuration option,
	<literal>EM_MULTIQUEUE</literal>, has been added which enables
	multi-queue support in the &man.em.4; driver.</para>

      <note>
	<para>Multi-queue support in the &man.em.4; driver is not
	  officially supported by &intel;.</para>
      </note>
    </sect2>

    <sect2 xml:id="kernel-sysctl">
      <title>System Tuning and Controls</title>

      <para revision="276986">Throttling via <acronym>ACPI</acronym>
	and <acronym>P4TCC</acronym> via &man.device.hints.5; have
	been turned off by default.</para>

      <para revision="278982" contrib="sponsor" sponsor="&ff;">The
	&man.hwpmc.4; default and maximum callchain depths have been
	increased.  The default has been increased from 16 to 32, and
	the maximum increased from 32 to 128.</para>

      <para revision="281255" contrib="sponsor"
	sponsor="&ix;, &ff;">The &man.devfs.5; device filesystem has
	been changed to update timestamps for read/write operations
	using seconds precision.  A new &man.sysctl.8;,
	<literal>vfs.devfs.dotimes</literal> has been added, which
	when set to a non-zero value, enables default precision
	timestamps for these operations.</para>

      <para revision="280632">The <literal>kern.osrelease</literal>
	and <literal>kern.osreldate</literal> are now configurable
	&man.jail.8; parameters.</para>

      <para revision="284665" contrib="sponsor" sponsor="&ff;">A new
	&man.sysctl.8;, <literal>kern.racct.enable</literal>, has been
	added, which when set to a non-zero value allows using
	&man.rctl.8; with the <literal>GENERIC</literal> kernel.
	A new kernel configuration option,
	<literal>RACCT_DISABLED</literal> has also been added.</para>

      <para revision="284665" contrib="sponsor" sponsor="&ff;">The
	<literal>GENERIC</literal> kernel configuration now includes
	<literal>RACCT</literal> and <literal>RCTL</literal> by
	default.</para>

      <note>
	<para>To enable <literal>RACCT</literal> and
	  <literal>RCTL</literal> on a system using the
	  <literal>GENERIC</literal> kernel configuration, add
	  <literal>kern.racct.enable=1</literal> to
	  &man.loader.conf.5;, and reboot the system.</para>
      </note>
    </sect2>
  </sect1>

  <sect1 xml:id="drivers">
    <title>Devices and Drivers</title>

    <para>This section covers changes and additions to devices and
      device drivers since &release.prev;.</para>

    <sect2 xml:id="drivers-device">
      <title>Device Drivers</title>

      <para revision="282199">The <literal>drm</literal> code has
	been updated to match &linux; version 3.8.13.</para>

      <para revision="281708">The &man.psm.4; driver has been updated
	to include improved support for newer Synaptics&nbsp;&reg;
	touchpads and the ClickPad&nbsp;&reg; mouse on newer
	Lenovo&nbsp;&trade; laptops.</para>
    </sect2>

    <sect2 xml:id="drivers-storage">
      <title>Storage Drivers</title>

      <para revision="281957">The &man.hptnr.4; driver has been
	updated to version 1.1.1.</para>
    </sect2>

    <sect2 xml:id="drivers-network">
      <title>Network Drivers</title>

      <para revision="274486">The &man.pf.4; interface default hash
	has been changed from <literal>Jenkins</literal> to
	<literal>Murmur3</literal>, providing a 3-percent performance
	increase in packets-per-second.</para>

      <para revision="279157">The &man.ral.4; driver has been updated
	to support the RT5390 and RT5392 chipsets.</para>

      <para revision="284066" contrib="sponsor" sponsor="&yandex;">The
	&man.gre.4; driver has been significantly overhauled, and has
	been split into two separate modules, &man.gre.4; and
	&man.me.4;.</para>

      <para revision="284365">The &man.vxlan.4; driver has been added,
	which creates a virtual Layer 2 (Ethernet) network overlaid in
	a Layer 3 (IP/UDP) network.  The &man.vxlan.4; driver is
	analogous to &man.vlan.4;, but is designed to be better suited
	for large, multiple-tenant datacenter environments.</para>

      <para revision="284499">The &man.cdce.4; driver has been updated
	to include support for the RTL8153 chipset.</para>

      <para revision="284555" contrib="sponsor"
	sponsor="&solarflare;">The &man.sfxge.4; driver has been
	updated to support Solarflare Flareon Ultra 7000-series
	chipsets.</para>
    </sect2>
  </sect1>

  <sect1 xml:id="hardware">
    <title>Hardware Support</title>

    <para>This section covers general hardware support for physical
      machines, hypervisors, and virtualization environments, as well
      as hardware changes and updates that do not otherwise fit in
      other sections of this document.</para>

    <sect2 xml:id="hardware-support">
      <title>Hardware Support</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="hardware-virtualization">
      <title>Virtualization Support</title>

      <para revision="275273">The &man.virtio.console.4; driver has
	been added, which provides an interface to VirtIO console
	devices through a &man.tty.4; device.</para>

      <para revision="276403">The &man.bhyve.8; hypervisor has been
	updated to support &amd; processors with
	<acronym>SVM</acronym> and <acronym>AMD-V</acronym> hardware
	extensions.</para>

      <para revision="280370">The &man.bhyve.8; hypervisor has been
	updated to support <literal>DSM TRIM</literal> commands for
	virtual <acronym>AHCI</acronym> disks.</para>

      <para revision="283280" contrib="sponsor" sponsor="&msostc;">The
	Hyper-V&trade; drivers have been updated with several
	enhancements:</para>

      <itemizedlist>
	<listitem>
	  <para>The &man.hv.vmbus.4; driver now has multi-channel
	    support.</para>
	</listitem>

	<listitem>
	  <para>The &man.hv.storvsc.4; driver now has scatter/gather
	    support, in addition to performance improvements.</para>
	</listitem>

	<listitem>
	  <para>The &man.hv.kvp.4; driver has received several bug
	    fixes.</para>
	</listitem>
      </itemizedlist>

      <para revision="285236" contrib="sponsor" sponsor="&msostc;">The
	&man.hv.netvsc.4; driver has been updated to support checksum
	offloading and <acronym>TSO</acronym>.</para>
    </sect2>

    <sect2 xml:id="hardware-arm">
      <title>ARM Support</title>

      <para revision="278079" arch="arm">Support to turn off the
	BeagleBone Black system with the &man.shutdown.8;
	<literal>-p</literal> flag or by invoking &man.poweroff.8; has
	been added.</para>

      <para revision="278599" arch="arm">Support for the Exynos 5420
	Octa system has been added.</para>

      <para revision="278599" arch="arm">The <acronym>SMP</acronym>
	option has been enabled for all Exynos 5 systems supported by
	&os;.</para>

      <para revision="278608">The <literal>bcm2835_cpufreq</literal>
	driver has been added, which supports <acronym>CPU</acronym>
	frequency and voltage control on the Raspberry Pi
	<acronym>SOC</acronym>.</para>

      <para revision="283500" arch="arm">Support for the Toradex
	Apalis i.MX6 development board has been added.</para>

      <para revision="283500" arch="arm">Audio transmission drivers
	have been added for Digital Audio Multiplexer
	(<acronym>AUDMUXM</acronym>), Smart Direct Memory Access
	Controller (<acronym>SDMA</acronym>), and Syncronous Serial
	Interface (<acronym>SSI</acronym>).</para>
    </sect2>
  </sect1>

  <sect1 xml:id="storage">
    <title>Storage</title>

    <para>This section covers changes and additions to file systems
      and other storage subsystems, both local and networked.</para>

    <sect2 xml:id="storage-general">
      <title>General Storage</title>

      <para revision="279002" contrib="sponsor" sponsor="&ix;">The
	&man.ctl.4; <acronym>LUN</acronym> mapping has been rewritten,
	replacing <acronym>iSCSI</acronym>-specific mapping mechanisms
	with a new mechanism that works for any port.</para>

      <para revision="279055" contrib="sponsor" sponsor="&ix;">The
	&man.ctld.8; utility has been updated to allow controlling
	non-<acronym>iSCSI</acronym> &man.ctl.4; ports.</para>

      <para revision="283223" contrib="sponsor" sponsor="&ff;">The
	&man.autofs.5; subsystem has been updated to include a new
	&man.auto.master.5; map, <literal>-media</literal>, which
	allows automatically mounting removable media, such as
	<acronym>CD</acronym> drives or <acronym>USB</acronym> flash
	drives.</para>

      <para revision="283242" contrib="sponsor" sponsor="&ff;">The
	&man.autofs.5; subsystem has been updated to include a new
	&man.auto.master.5; map, <literal>-noauto</literal>, which
	handles &man.fstab.5; entries set to
	<literal>noauto</literal>.</para>
    </sect2>

    <sect2 xml:id="storage-net">
      <title>Networked Storage</title>

      <para revision="274939" contrib="sponsor" sponsor="&ix;">The
	&man.ctld.8; utility has been updated to include support for
	registering <acronym>iSCSI</acronym> targets and portals on
	<acronym>iSNS</acronym> servers.  This provides a mechanism
	which allows <acronym>iSCSI</acronym> initiators to find
	targets and portals without requiring active
	discovery.</para>

      <para revision="275249" contrib="sponsor" sponsor="&ff;">Support
	for the <literal>timeo</literal>, <literal>actimeo</literal>,
	<literal>noac</literal>, and <literal>proto</literal> options
	have been added to &man.mount.nfs.8;.</para>
    </sect2>

    <sect2 xml:id="storage-zfs">
      <title>ZFS</title>

      <para revision="275490">A new tunable,
	<literal>vfs.zfs.spa_slop_shift</literal>, has been added,
	which controls how much space is reserved by default.</para>

      <para revision="277583">The <literal>arc_meta_limit</literal>
	statistics are now visible through the
	<literal>kstat</literal> &man.sysctl.8;.  As a result of this
	change, the <literal>vfs.zfs.arc_meta_used</literal>
	&man.sysctl.8; has been removed, and replaced with the
	<literal>kstat.zfs.misc.arcstats.arc_meta_used</literal>
	&man.sysctl.8;.</para>
    </sect2>

    <sect2 xml:id="storage-geom">
      <title>&man.geom.4;</title>

      <para revision="275891" contrib="sponsor" sponsor="&ix;">The
	&man.ctl.4; subsystem has been updated, increasing the ports
	limit from <literal>128</literal> to <literal>256</literal>,
	and <acronym>LUN</acronym> limit from <literal>256</literal>
	to <literal>1024</literal>.</para>

      <para revision="282861">Support for the
	<literal>apple-boot</literal>, <literal>apple-hfs</literal>,
	and <literal>apple-ufs</literal> <acronym>MBR</acronym>
	partitioning schemes have been added to &man.gpart.8;.</para>
    </sect2>
  </sect1>

  <sect1 xml:id="boot">
    <title>Boot Loader Changes</title>

    <para>This section covers the boot loader, boot menu, and other
      boot-related changes.</para>

    <sect2 xml:id="boot-loader">
      <title>Boot Loader Changes</title>

      <para revision="281323">Support for <literal>bzipfs</literal>
	has been added to the <acronym>EFI</acronym> loader.</para>

      <para revision="281843">The boot loader has been updated to
	support entering the <acronym>GELI</acronym> passphrase before
	loading the kernel.  To enable this behavior, add
	<literal>geom_eli_passphrase_prompt="YES"</literal> to
	&man.loader.conf.5;.</para>

      <para revision="283262" contrib="sponsor" sponsor="&ff;">The
	memory test run at boot time on &os;/&arch.amd64; platforms
	has been disabled by default.</para>

      <para revision="283972">A new &man.ttys.5; class,
	<literal>3wire</literal>, has been added.  This is similar to
	the existing terminal classes, but does not have a defined
	baudrate.</para>

      <para revision="284775" contrib="sponsor" sponsor="&ff;"
	arch="arm">The &man.ttys.5; file for &os;/&arch.arm; has been
	updated to enable <filename>ttyu1</filename>,
	<filename>ttyu2</filename>, and <filename>ttyu3</filename> by
	default, if the callin port is an active console port.</para>
    </sect2>

    <sect2 xml:id="boot-menu">
      <title>Boot Menu Changes</title>

      <para>&nbsp;</para>
    </sect2>
  </sect1>

  <sect1 xml:id="network">
    <title>Networking</title>

    <para>This section describes changes that affect networking in
      &os;.</para>

    <sect2 xml:id="network-protocols">
      <title>Network Procols</title>

      <para revision="273838" contrib="sponsor"
	sponsor="&limelight;">Support for <acronym>PLPMTUD</acronym>
	blackhole detection (<acronym>RFC</acronym> 4821) has been
	added to the &man.tcp.4; stack, disabled by default.  New
	control tunables have been added:</para>

      <informaltable frame="none" pgwide="0">
	<tgroup cols="2">
	  <colspec colwidth="1*"/>
	  <colspec colwidth="1*"/>
	  <thead>
	    <row>
	      <entry>Tunable</entry>
	      <entry>Description</entry>
	    </row>
	  </thead>

	  <tbody>
	    <row>
	      <entry><literal>net.inet.tcp.pmtud_blackhole_detection</literal></entry>
	      <entry>Enables or disables <acronym>PLPMTUD</acronym>
		blackhole detection</entry>
	    </row>

	    <row>
	      <entry><literal>net.inet.tcp.pmtud_blackhole_mss</literal></entry>
	      <entry><acronym>MSS</acronym> to try for IPv4</entry>
	    </row>

	    <row>
	      <entry><literal>net.inet.tcp.v6pmtud_blackhole_mss</literal></entry>
	      <entry><acronym>MSS to try for IPv6</acronym></entry>
	    </row>
	  </tbody>
	</tgroup>
      </informaltable>

      <para>New monitoring &man.sysctl.8;s haven been added:</para>

      <informaltable frame="none" pgwide="0">
	<tgroup cols="2">
	  <colspec colwidth="1*"/>
	  <colspec colwidth="1*"/>
	  <thead>
	    <row>
	      <entry>Tunable</entry>
	      <entry>Description</entry>
	    </row>
	  </thead>

	  <tbody>
	    <row>
	      <entry><literal>net.inet.tcp.pmtud_blackhole_activated</literal></entry>
	      <entry>Number of times the code was activated to attempt
		downshifting the <acronym>MSS</acronym></entry>
	    </row>

	    <row>
	      <entry><literal>net.inet.tcp.pmtud_blackhole_min_activated</literal></entry>
	      <entry>Number of times the blackhole
		<acronym>MSS</acronym> was used in an attempt to
		downshift</entry>
	    </row>

	    <row>
	      <entry><literal>net.inet.tcp.pmtud_blackhole_failed</literal></entry>
	      <entry>Number of times that the blackhole failed to
		connect after downshifting the
		<acronym>MSS</acronym></entry>
	    </row>
	  </tbody>
	</tgroup>
      </informaltable>

    </sect2>
  </sect1>

  <sect1 xml:id="ports">
    <title>Ports Collection and Package Infrastructure</title>

    <para>This section covers changes to the &os;&nbsp;Ports
      Collection, package infrastructure, and package maintenance and
      installation tools.</para>

    <sect2 xml:id="ports-infrastructure">
      <title>Infrastructure Changes</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="ports-packages ">
      <title>Packaging Changes</title>

      <para>&nbsp;</para>
    </sect2>
  </sect1>

  <sect1 xml:id="doc">
    <title>Documentation</title>

    <para>This section covers changes to the &os;&nbsp;Documentation
      Project sources and toolchain.</para>

    <sect2 xml:id="doc-sources">
      <title>Documentation Source Changes</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="doc-toolchain">
      <title>Documentation Toolchain Changes</title>

      <para>&nbsp;</para>
    </sect2>
  </sect1>

  <sect1 xml:id="releng">
    <title>Release Engineering and Integration</title>

    <para>This section convers changes that are specific to the
      &os;&nbsp;Release Engineering processes.</para>

    <sect2 xml:id="releng-changes">
      <title>Integration Changes</title>

      <para revision="283161" contrib="sponsor" sponsor="&ff;">The
	Release Engineering build tools have been updated to support
	building &os;/&arch.arm; images without external utilities for
	supported boards where a corresponding
	<literal>u-boot</literal> port exists in the Ports
	Collection.</para>

      <para revision="283548" contrib="sponsor" sponsor="&ff;">The
	&os;/&arch.i386; memory stick installation images are now
	created using the &man.mkimg.1; utility, matching the way
	the &os;/&arch.amd64; images are created.</para>
    </sect2>
  </sect1>
</article>