From owner-svn-src-all@freebsd.org  Fri Jan 20 17:30:01 2017
Return-Path: <owner-svn-src-all@freebsd.org>
Delivered-To: svn-src-all@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 43E0ACB9FE6;
 Fri, 20 Jan 2017 17:30:01 +0000 (UTC)
 (envelope-from wblock@FreeBSD.org)
Received: from repo.freebsd.org (repo.freebsd.org
 [IPv6:2610:1c1:1:6068::e6a:0])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 130631891;
 Fri, 20 Jan 2017 17:30:01 +0000 (UTC)
 (envelope-from wblock@FreeBSD.org)
Received: from repo.freebsd.org ([127.0.1.37])
 by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id v0KHU0AS043466;
 Fri, 20 Jan 2017 17:30:00 GMT (envelope-from wblock@FreeBSD.org)
Received: (from wblock@localhost)
 by repo.freebsd.org (8.15.2/8.15.2/Submit) id v0KHU0dK043465;
 Fri, 20 Jan 2017 17:30:00 GMT (envelope-from wblock@FreeBSD.org)
Message-Id: <201701201730.v0KHU0dK043465@repo.freebsd.org>
X-Authentication-Warning: repo.freebsd.org: wblock set sender to
 wblock@FreeBSD.org using -f
From: Warren Block <wblock@FreeBSD.org>
Date: Fri, 20 Jan 2017 17:30:00 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: svn commit: r312547 - head/lib/libc/sys
X-SVN-Group: head
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
 user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all/>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 20 Jan 2017 17:30:01 -0000

Author: wblock (doc committer)
Date: Fri Jan 20 17:29:59 2017
New Revision: 312547
URL: https://svnweb.freebsd.org/changeset/base/312547

Log:
  Mention sendfile(2) by popular demand.
  
  Submitted by:	alc, kib
  MFC after:	1 week
  Sponsored by:	iXsystems
  Differential Revision:	https://reviews.freebsd.org/D9259

Modified:
  head/lib/libc/sys/shm_open.2

Modified: head/lib/libc/sys/shm_open.2
==============================================================================
--- head/lib/libc/sys/shm_open.2	Fri Jan 20 17:28:52 2017	(r312546)
+++ head/lib/libc/sys/shm_open.2	Fri Jan 20 17:29:59 2017	(r312547)
@@ -28,7 +28,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd January 13, 2017
+.Dd January 20, 2017
 .Dt SHM_OPEN 2
 .Os
 .Sh NAME
@@ -187,6 +187,11 @@ kernel implementation explicitly include
 and
 .Xr write 2 .
 .Pp
+.Fx
+also supports zero-copy transmission of data from shared memory
+objects with
+.Xr sendfile 2 .
+.Pp
 Neither shared memory objects nor their contents persist across reboots.
 .Pp
 Writes do not extend shared memory objects, so
@@ -281,7 +286,8 @@ requires write permission to the shared 
 .Xr fstat 2 ,
 .Xr ftruncate 2 ,
 .Xr mmap 2 ,
-.Xr munmap 2
+.Xr munmap 2 ,
+.Xr sendfile 2
 .Sh STANDARDS
 The
 .Fn shm_open