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---
title: "FreeBSD 7.2-RELEASE Release Notes"
sidenav: download
---
++++
<h2>Release Highlights</h2>
<p>The highlights in the 7.2-RELEASE are the following:</p>
<ul>
<li><p>[amd64, i386] The FreeBSD virtual memory subsystem now
supports fully transparent use of <b class="APPLICATION">superpages</b> for application memory;
application memory pages are dynamically promoted to or
demoted from superpages without any modification to
application code. This change offers the benefit of large page
sizes such as improved virtual memory efficiency and reduced
TLB (translation lookaside buffer) misses without downsides
like application changes and virtual memory
inflexibility. This is disabled by default and can be enabled
by setting a loader tunable <code class="VARNAME">vm.pmap.pg_ps_enabled</code> to <tt class="LITERAL">1</tt>.</p></li>
<li><p>[amd64] The FreeBSD kernel virtual address space has been
increased to 6GB. This allows subsystems to use larger virtual
memory space than before. For example, <a href="http://www.FreeBSD.org/cgi/man.cgi?query=zfs&sektion=8&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">zfs</span>(8)</span></a> adaptive
replacement cache (ARC) requires large kernel memory space to
cache file system data, so it benefits from the increased
address space. Note that the ceiling on the kernel map size is
now 60% of the size rather than an absolute quantity.</p></li>
<li><p>[sparc64] The FreeBSD now supports Ultra SPARC III
(Cheetah) processor family.</p></li>
<li><p>[i386] The <a href="http://www.FreeBSD.org/cgi/man.cgi?query=boot&sektion=8&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">boot</span>(8)</span></a> BTX loader
has been improved. This fixes several boot issues on recent
machines reported for 7.1-RELEASE and before.</p></li>
<li><p>A bug in the <a href="http://www.FreeBSD.org/cgi/man.cgi?query=ciss&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">ciss</span>(4)</span></a> driver which
caused low “max device openings” count and led
to poor performance has been fixed.</p></li>
<li><p>The <a href="http://www.FreeBSD.org/cgi/man.cgi?query=sdhci&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">sdhci</span>(4)</span></a> driver has
been added. This supports PCI devices with class 8 and
subclass 5 according to the SD Host Controller
Specification.</p></li>
<li><p>Various network interface drivers have been improved,
including <a href="http://www.FreeBSD.org/cgi/man.cgi?query=ae&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect"><span class="CITEREFENTRY"><span class="REFENTRYTITLE">ae</span>(4)</span></a>, <a href="http://www.FreeBSD.org/cgi/man.cgi?query=ath_hal&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">ath_hal</span>(4)</span></a>, <a href="http://www.FreeBSD.org/cgi/man.cgi?query=axe&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">axe</span>(4)</span></a>, <a href="http://www.FreeBSD.org/cgi/man.cgi?query=bce&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">bce</span>(4)</span></a>, <a href="http://www.FreeBSD.org/cgi/man.cgi?query=cxgb&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">cxgb</span>(4)</span></a>, <a href="http://www.FreeBSD.org/cgi/man.cgi?query=fxp&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">fxp</span>(4)</span></a>, <a href="http://www.FreeBSD.org/cgi/man.cgi?query=igb&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">igb</span>(4)</span></a>, <a href="http://www.FreeBSD.org/cgi/man.cgi?query=jme&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">jme</span>(4)</span></a>, <a href="http://www.FreeBSD.org/cgi/man.cgi?query=msk&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">msk</span>(4)</span></a>, <a href="http://www.FreeBSD.org/cgi/man.cgi?query=mxge&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">mxge</span>(4)</span></a>, <a href="http://www.FreeBSD.org/cgi/man.cgi?query=nfe&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">nfe</span>(4)</span></a>, <a href="http://www.FreeBSD.org/cgi/man.cgi?query=re&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect"><span class="CITEREFENTRY"><span class="REFENTRYTITLE">re</span>(4)</span></a>, <a href="http://www.FreeBSD.org/cgi/man.cgi?query=rl&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect"><span class="CITEREFENTRY"><span class="REFENTRYTITLE">rl</span>(4)</span></a>, <a href="http://www.FreeBSD.org/cgi/man.cgi?query=sis&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">sis</span>(4)</span></a>, and <a href="http://www.FreeBSD.org/cgi/man.cgi?query=txp&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">txp</span>(4)</span></a>.</p></li>
<li><p>The <a href="http://www.FreeBSD.org/cgi/man.cgi?query=btpand&sektion=8&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">btpand</span>(8)</span></a> daemon
from NetBSD has been added. This daemon provides support for
Bluetooth Network Access Point (NAP), Group Ad-hoc Network
(GN) and Personal Area Network User (PANU)
profiles.</p></li>
<li><p>The <a href="http://www.FreeBSD.org/cgi/man.cgi?query=jail&sektion=8&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">jail</span>(8)</span></a> subsystem
has been updated. Changes include:</p>
<ul>
<li>
<p>Multiple addresses of both IPv4 and IPv6 per jail has
been supported. It is even possible to have jails without
an IP address at all, which basically gives one a chrooted
environment with restricted process view and no
networking.</p>
</li>
<li>
<p>SCTP (<a href="http://www.FreeBSD.org/cgi/man.cgi?query=sctp&sektion=4&manpath=FreeBSD+7.2-RELEASE" shape="rect"><span class="CITEREFENTRY"><span class="REFENTRYTITLE">sctp</span>(4)</span></a>) with
IPv6 in jails has been implemented.</p>
</li>
<li><p>Specific CPU binding by using <a href="http://www.FreeBSD.org/cgi/man.cgi?query=cpuset&sektion=1&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">cpuset</span>(1)</span></a> has
been implemented. Note that the current implementation
allows the superuser inside of the jail to change the
CPU bindings specified. This behavior will be fixed in
the next release.</p>
</li>
<li>
<p>A <a href="http://www.FreeBSD.org/cgi/man.cgi?query=jail&sektion=8&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">jail</span>(8)</span></a> can
start with a specific route FIB now.</p>
</li>
<li>
<p>A <tt class="LITERAL">show jails</tt> subcommand in <a href="http://www.FreeBSD.org/cgi/man.cgi?query=ddb&sektion=8&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">ddb</span>(8)</span></a> has been
added.</p>
</li>
<li><p>Compatibility support which permits 32-bit jail
binaries to be used on 64-bit systems to manage jails has been
added.</p>
</li>
<li><p>Note that both version numbers of <tt class="LITERAL">jail</tt> and <tt class="LITERAL">prison</tt> in the <a href="http://www.FreeBSD.org/cgi/man.cgi?query=jail&sektion=8&manpath=FreeBSD+7.2-RELEASE" shape="rect">
<span class="CITEREFENTRY"><span class="REFENTRYTITLE">jail</span>(8)</span></a> have been
updated for the new features.</p></li>
</ul>
</li>
<li><p>The supported version of the <b class="APPLICATION">GNOME</b> desktop environment (<a href="http://www.FreeBSD.org/cgi/url.cgi?ports/x11/gnome2/pkg-descr" shape="rect"><tt class="FILENAME">x11/gnome2</tt></a>) has been updated from
2.22 to 2.26.</p></li>
<li><p>The supported version of the <b class="APPLICATION">KDE</b>
desktop environment has been updated from 3.5.10 (<a href="http://www.FreeBSD.org/cgi/url.cgi?ports/x11/kde3/pkg-descr" shape="rect"><tt class="FILENAME">x11/kde3</tt></a>) to 4.2.2 (<a href="http://www.FreeBSD.org/cgi/url.cgi?ports/x11/kde4/pkg-descr" shape="rect"><tt class="FILENAME">x11/kde4</tt></a>).</p></li>
</ul>
<p>For more details, please see <a href="../relnotes-detailed/" shape="rect">the
Detailed Release Notes</a>.</p>
<p>A list of all platforms currently under development can be found
on the <a href="../../../platforms/index.html" shape="rect">Supported
Platforms</a> page.</p>
</div>
<br class="clearboth" />
</div>
++++
|
