From owner-svn-src-all@FreeBSD.ORG  Sat Dec 15 22:33:47 2012
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
 by hub.freebsd.org (Postfix) with ESMTP id 36F85843;
 Sat, 15 Dec 2012 22:33:47 +0000 (UTC) (envelope-from bright@mu.org)
Received: from elvis.mu.org (elvis.mu.org [192.203.228.196])
 by mx1.freebsd.org (Postfix) with ESMTP id 0CD6A8FC1A;
 Sat, 15 Dec 2012 22:33:47 +0000 (UTC)
Received: from [10.0.1.102] (c-67-180-208-218.hsd1.ca.comcast.net
 [67.180.208.218])
 by elvis.mu.org (Postfix) with ESMTPSA id EC49C1A3C1E;
 Sat, 15 Dec 2012 14:33:39 -0800 (PST)
References: <201212110708.qBB78EWx025288@svn.freebsd.org>
 <201212121046.43706.jhb@freebsd.org>
 <CAJ-Vmo=U04GX+ZyKuzXLwV+PpzU6_dm5BCmL=DWfsmhTVAR+sA@mail.gmail.com>
 <201212121658.49048.jhb@freebsd.org> <50C90567.8080406@FreeBSD.org>
 <50C909BD.9090709@mu.org> <50C91B32.4080904@FreeBSD.org>
 <50C91CD3.7030900@mu.org> <50C9206D.6080502@FreeBSD.org>
 <50C9271C.70803@mu.org> <20121215210333.GH1411@garage.freebsd.pl>
Mime-Version: 1.0 (1.0)
In-Reply-To: <20121215210333.GH1411@garage.freebsd.pl>
Content-Type: text/plain;
	charset=us-ascii
Content-Transfer-Encoding: quoted-printable
Message-Id: <03D95002-35FE-4880-80FA-3E97944AB988@mu.org>
X-Mailer: iPhone Mail (10A523)
From: Alfred Perlstein <bright@mu.org>
Subject: Re: svn commit: r244112 - head/sys/kern
Date: Sat, 15 Dec 2012 14:33:37 -0800
To: Pawel Jakub Dawidek <pjd@FreeBSD.org>
Cc: Adrian Chadd <adrian@FreeBSD.org>,
 "src-committers@FreeBSD.org" <src-committers@FreeBSD.org>,
 John Baldwin <jhb@FreeBSD.org>,
 "svn-src-all@FreeBSD.org" <svn-src-all@FreeBSD.org>,
 Alfred Perlstein <alfred@FreeBSD.org>, Andriy Gapon <avg@FreeBSD.org>,
 Navdeep Parhar <np@FreeBSD.org>,
 "svn-src-head@FreeBSD.org" <svn-src-head@FreeBSD.org>
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.14
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: <http://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: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 15 Dec 2012 22:33:47 -0000

Your use case (small swap & large ram) is exactly why I would like to try th=
is.=20

Do you object?

Sent from my iPhone

On Dec 15, 2012, at 1:03 PM, Pawel Jakub Dawidek <pjd@FreeBSD.org> wrote:

> On Wed, Dec 12, 2012 at 04:53:48PM -0800, Alfred Perlstein wrote:
>> Like what if I do gzipp'd kernel dumps next? (on my todo list)  How many=20=

>> people will complain that "gzip is too dangerous in kernel context foo=20=

>> foo!!!!"
>>=20
>> Not sure, I guess I'll find out?
>=20
> Well... :) savecore(8) has an option to compress the dumps. The only use
> case for compressing-while-dumping I see is small swap/dump partition.
> I'm not against this change, but I would not use it myself. When you are
> dumping your kernel is in undefined state, so the less code you execute
> in that state the higher chances your dump will succeed. I much prefer
> to either compress the dumps with savecore(8) or use ZFS dataset with
> compression enabled for /var/crash/.
>=20
> --=20
> Pawel Jakub Dawidek                       http://www.wheelsystems.com
> FreeBSD committer                         http://www.FreeBSD.org
> Am I Evil? Yes, I Am!                     http://tupytaj.pl