doc/go1.16: document net TCP listener's backlog size update

Updates #41470

Change-Id: Iebd3a339504aa7f8834853d6a740557fb3bce3ef
Reviewed-on: https://go-review.googlesource.com/c/go/+/262938
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Emmanuel Odeke <emm.odeke@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>

diff --git a/doc/go1.16.html b/doc/go1.16.html
index 43bcc779e5fbcf61dc7ff3c43c5903dfc1f78c29..2f2e395729e49234ed84afb51101ce991ea2fc88 100644 (file)
--- a/doc/go1.16.html
+++ b/doc/go1.16.html
@@ -228,6 +228,12 @@ Do not send CLs removing the interior tags from such phrases.
   with <code>"use of closed network connection"</code>.
 </p>
 
+<p><!-- CL 255898 -->
+  In previous Go releases the default TCP listener backlog size on Linux systems,
+  set by <code>/proc/sys/net/core/somaxconn</code>, was limited to a maximum of <code>65535</code>.
+  On Linux kernel version 4.1 and above, the maximum is now <code>4294967295</code>.
+</p>
+
 <h3 id="reflect"><a href="/pkg/reflect/">reflect</a></h3>
 
 <p><!-- CL 259237, golang.org/issue/22075 -->