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</header>
<p>This document describes the changes made to the ERTS application.</p>
+<section><title>Erts 5.10.4.2</title>
+
+ <section><title>Improvements and New Features</title>
+ <list>
+ <item>
+ <p>Introduced support for eager check I/O.</p>
+ <p>By default eager check I/O will be disabled, but this
+ will most likely be changed in OTP 18. When eager check
+ I/O is enabled, schedulers will more frequently check for
+ I/O work. Outstanding I/O operation will however not be
+ prioritized to the same extent as when eager check I/O is
+ disabled.</p>
+ <p>Eager check I/O can be enabled and disabled using the
+ <c>erl</c> command line argument <seealso
+ marker="erl#+secio"><c>+secio</c></seealso>.</p>
+ <p>Characteristics impact when enabled:</p> <list>
+ <item>Lower latency and smoother management of externally
+ triggered I/O operations.</item> <item>A slightly reduced
+ priority of externally triggered I/O operations.</item>
+ </list>
+ <p>
+ Own Id: OTP-12117</p>
+ </item>
+ </list>
+ </section>
+
+</section>
+
+<section><title>Erts 5.10.4.1</title>
+
+ <section><title>Known Bugs and Problems</title>
+ <list>
+ <item>
+ <p>
+ When using gen_tcp:connect and the <c>fd</c> option with
+ <c>port</c> and/or <c>ip</c>, the <c>port</c> and
+ <c>ip</c> options were ignored. This has been fixed so
+ that if <c>port</c> and/or <c>ip</c> is specified
+ together with <c>fd</c> a bind is requested for that
+ <c>fd</c>. If <c>port</c> and/or <c>ip</c> is not
+ specified bind will not be called.</p>
+ <p>
+ Own Id: OTP-12061</p>
+ </item>
+ </list>
+ </section>
+
+</section>
+
<section><title>Erts 5.10.4</title>
<section><title>Fixed Bugs and Malfunctions</title>