From owner-freebsd-stable@FreeBSD.ORG Tue Jan 17 08:10:52 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 938C21065673 for ; Tue, 17 Jan 2012 08:10:52 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from qmta04.emeryville.ca.mail.comcast.net (qmta04.emeryville.ca.mail.comcast.net [76.96.30.40]) by mx1.freebsd.org (Postfix) with ESMTP id 672C68FC14 for ; Tue, 17 Jan 2012 08:10:42 +0000 (UTC) Received: from omta12.emeryville.ca.mail.comcast.net ([76.96.30.44]) by qmta04.emeryville.ca.mail.comcast.net with comcast id NYAi1i0020x6nqcA4YAi2k; Tue, 17 Jan 2012 08:10:42 +0000 Received: from koitsu.dyndns.org ([67.180.84.87]) by omta12.emeryville.ca.mail.comcast.net with comcast id NYAh1i0041t3BNj8YYAhhl; Tue, 17 Jan 2012 08:10:41 +0000 Received: by icarus.home.lan (Postfix, from userid 1000) id BE346102C19; Tue, 17 Jan 2012 00:10:40 -0800 (PST) Date: Tue, 17 Jan 2012 00:10:40 -0800 From: Jeremy Chadwick To: Aristedes Maniatis Message-ID: <20120117081040.GA18825@icarus.home.lan> References: <4F15253E.7070404@ish.com.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4F15253E.7070404@ish.com.au> User-Agent: Mutt/1.5.21 (2010-09-15) Cc: freebsd-stable Subject: Re: dumpdev default X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 17 Jan 2012 08:10:52 -0000 On Tue, Jan 17, 2012 at 06:37:34PM +1100, Aristedes Maniatis wrote: > The manual states that dumpdev "AUTO is the default as of FreeBSD 6.0" [1] > > However: > > # uname -a > FreeBSD xxxxxx 9.0-RELEASE FreeBSD 9.0-RELEASE #0: Tue Jan 3 07:46:30 UTC 2012 root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64 > > # grep dumpdev /etc/defaults/rc.conf > dumpdev="NO" # Device to crashdump to (device name, AUTO, or NO). > savecore_flags="" # Used if dumpdev is enabled above, and present. > > > It looks like NO is still the default. Is there a reason why this should not be turned on even for production machines? I haven't read about any side effects, but it seems to be off by default for some reason. The Handbook is incorrect, and I filed a PR for this matter last year (PR 159650): http://lists.freebsd.org/pipermail/freebsd-doc/2011-August/018654.html Worth reading: http://lists.freebsd.org/pipermail/freebsd-stable/2011-August/063541.html http://lists.freebsd.org/pipermail/freebsd-stable/2011-August/063542.html http://lists.freebsd.org/pipermail/freebsd-stable/2011-August/063543.html And the entire thread: http://lists.freebsd.org/pipermail/freebsd-stable/2011-August/063535.html -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, US | | Making life hard for others since 1977. PGP 4BD6C0CB |