From owner-freebsd-stable@FreeBSD.ORG  Tue Jan 20 13:38:59 2015
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 31F782A0
 for <freebsd-stable@freebsd.org>; Tue, 20 Jan 2015 13:38:59 +0000 (UTC)
Received: from gromit.dlib.vt.edu (gromit.dlib.vt.edu [128.173.126.120])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client CN "gromit.dlib.vt.edu",
 Issuer "Chumby Certificate Authority" (not verified))
 by mx1.freebsd.org (Postfix) with ESMTPS id 05CE6EFF
 for <freebsd-stable@freebsd.org>; Tue, 20 Jan 2015 13:38:58 +0000 (UTC)
Received: from pmather.lib.vt.edu (pmather.lib.vt.edu [128.173.126.193])
 (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by gromit.dlib.vt.edu (Postfix) with ESMTPSA id 9ADD8340;
 Tue, 20 Jan 2015 08:30:16 -0500 (EST)
Content-Type: text/plain; charset=us-ascii
Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\))
Subject: Re: Keep -STABLE updated!
From: Paul Mather <paul@gromit.dlib.vt.edu>
In-Reply-To: <CAKFCL4VEjSp2xfzhRO3Mp4kpj8oCtzK6R5LK3J8q_7MYZx_w5w@mail.gmail.com>
Date: Tue, 20 Jan 2015 08:30:16 -0500
Content-Transfer-Encoding: quoted-printable
Message-Id: <B63A47BC-DA37-494D-AA83-DD5F43126E24@gromit.dlib.vt.edu>
References: <54BDB10D.4000603@gmail.com>
 <CAKFCL4VEjSp2xfzhRO3Mp4kpj8oCtzK6R5LK3J8q_7MYZx_w5w@mail.gmail.com>
To: Brandon Allbery <allbery.b@gmail.com>
X-Mailer: Apple Mail (2.1878.6)
Cc: Yass Amed <zagazaw2004@gmail.com>,
 freebsd-stable <freebsd-stable@freebsd.org>
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.18-1
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-stable>,
 <mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable/>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
 <mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 20 Jan 2015 13:38:59 -0000

On Jan 19, 2015, at 8:54 PM, Brandon Allbery <allbery.b@gmail.com> =
wrote:

> On Mon, Jan 19, 2015 at 8:36 PM, Yass Amed <zagazaw2004@gmail.com> =
wrote:
>=20
>> I'd like to clarify a certain info regarding FreeBSD -STABLE.
>> Currently, I am running 10-STABLE and need to know if it is mandatory =
to
>> rebuild kernel and world every time I sync the source using "# svn up
>> /usr/src"?
>>=20
>=20
> A running FreeBSD system never needs /usr/src. But if you are running
> STABLE (or CURRENT), sometimes you will want to look at the source to
> something in the running system (usually because it just did something
> unexpected...) and so it's helpful to have /usr/src match the running
> system. So, not necessary but often a good idea.


It's correct that, once built and running, a FreeBSD system never needs =
/usr/src.  However, a -STABLE or -CURRENT FreeBSD system will need =
/usr/src to apply any security advisories or errata (as happened =
recently, re: OpenSSL).  Unlike -RELEASE branches, -STABLE and -CURRENT =
don't get updates via freebsd-update.

Also, it's handy to have /usr/src and rebuild if ever there is a feature =
MFC'd that you'd like to have available on your -STABLE system (e.g., =
the bhyve support for AMD processors that was MFC'd not so long ago).  =
That's usually the main reason for running -STABLE, actually.

Cheers,

Paul.=