From owner-svn-src-all@freebsd.org  Tue Apr 19 15:08:36 2016
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 61640B132C2;
 Tue, 19 Apr 2016 15:08:36 +0000 (UTC)
 (envelope-from trasz@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 30DE41722;
 Tue, 19 Apr 2016 15:08:36 +0000 (UTC)
 (envelope-from trasz@FreeBSD.org)
Received: from repo.freebsd.org ([127.0.1.37])
 by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u3JF8Zj1039042;
 Tue, 19 Apr 2016 15:08:35 GMT (envelope-from trasz@FreeBSD.org)
Received: (from trasz@localhost)
 by repo.freebsd.org (8.15.2/8.15.2/Submit) id u3JF8ZFQ039041;
 Tue, 19 Apr 2016 15:08:35 GMT (envelope-from trasz@FreeBSD.org)
Message-Id: <201604191508.u3JF8ZFQ039041@repo.freebsd.org>
X-Authentication-Warning: repo.freebsd.org: trasz set sender to
 trasz@FreeBSD.org using -f
From: Edward Tomasz Napierala <trasz@FreeBSD.org>
Date: Tue, 19 Apr 2016 15:08:35 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: svn commit: r298271 - head/sbin/tunefs
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: 2.1.21
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: Tue, 19 Apr 2016 15:08:36 -0000

Author: trasz
Date: Tue Apr 19 15:08:35 2016
New Revision: 298271
URL: https://svnweb.freebsd.org/changeset/base/298271

Log:
  Mention fsck_ffs -E in tunefs(8). It's non-obvious that one should
  use it after enabling TRIM.
  
  Reviewed by:	brueffer@
  MFC after:	1 month
  Sponsored by:	The FreeBSD Foundation
  Differential Revision:	https://reviews.freebsd.org/D5928

Modified:
  head/sbin/tunefs/tunefs.8

Modified: head/sbin/tunefs/tunefs.8
==============================================================================
--- head/sbin/tunefs/tunefs.8	Tue Apr 19 15:07:04 2016	(r298270)
+++ head/sbin/tunefs/tunefs.8	Tue Apr 19 15:08:35 2016	(r298271)
@@ -28,7 +28,7 @@
 .\"     @(#)tunefs.8	8.2 (Berkeley) 12/11/93
 .\" $FreeBSD$
 .\"
-.Dd June 22, 2011
+.Dd April 19, 2016
 .Dt TUNEFS 8
 .Os
 .Sh NAME
@@ -166,9 +166,15 @@ device for each freed block.
 The trim enable flag is typically set when the underlying device
 uses flash-memory as the device can use the delete command to
 pre-zero or at least avoid copying blocks that have been deleted.
+.Pp
+Note that this does not trim blocks that are already free.
+See the
+.Xr fsck_ffs 8
+.Fl E
+flag.
 .El
 .Pp
-At least one of the above flags is required.
+At least one of these flags is required.
 .Sh FILES
 .Bl -tag -width ".Pa /etc/fstab"
 .It Pa /etc/fstab