From owner-freebsd-hackers@FreeBSD.ORG  Sat May 29 17:28:47 2004
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 1993316A4CE
	for <freebsd-hackers@freebsd.org>;
	Sat, 29 May 2004 17:28:47 -0700 (PDT)
Received: from outfbmx006.isp.belgacom.be (outfbmx006.isp.belgacom.be
	[195.238.3.101])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 89A3443D3F
	for <freebsd-hackers@freebsd.org>;
	Sat, 29 May 2004 17:28:46 -0700 (PDT)
	(envelope-from geert@lori.mine.nu)
Received: from outmx003.isp.belgacom.be (outmx003.isp.belgacom.be
	[195.238.2.100])
	(8.12.11/8.12.11/Skynet-OUT-FALLBACK-2.22) with ESMTP id
	i4TK8MTS026410        for <freebsd-hackers@freebsd.org>;
	Sat, 29 May 2004 22:08:22 +0200
	(envelope-from <geert@lori.mine.nu>)
Received: from outmx003.isp.belgacom.be (localhost [127.0.0.1])
	with ESMTP id i4TK86VZ025584
	for <freebsd-hackers@freebsd.org>; Sat, 29 May 2004 22:08:07 +0200
	(envelope-from <geert@lori.mine.nu>)
Received: from lori.mine.nu (199-55.240.81.adsl.skynet.be [81.240.55.199])
	with ESMTP id i4TK7xNk025527
	for <freebsd-hackers@freebsd.org>; Sat, 29 May 2004 22:07:59 +0200
	(envelope-from <geert@lori.mine.nu>)
Received: by lori.mine.nu (Postfix, from userid 1000)
	id 02C96DCE; Sat, 29 May 2004 22:07:48 +0200 (CEST)
Date: Sat, 29 May 2004 22:07:48 +0200
From: Geert Hendrickx <geert.hendrickx@ua.ac.be>
To: freebsd-hackers@freebsd.org
Message-ID: <20040529200748.GA87145@lori.mine.nu>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.4.2i
X-PGP-Key: http://www.win.ua.ac.be/~s005085/gnupgkey.txt
Subject: documentation on sysctl vm.defer_swapspace_pageouts?
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 30 May 2004 00:28:47 -0000

Hi, 

where can I find documentation on the vm.defer_swapspace_pageouts
sysctl?  LINT only mentions it, without explaining, man sysctl doesn't 
mention it at all, and even Google yields very few useful results...  

I was looking for a way to tune swap-usage a bit, I heard Linux has a
"swappiness" setting (telling the kernel how easy it should go with 
paging out), and I hoped FreeBSD would have something similar.
vm.defer_swapspace_pageouts might do the trick, but so it seems to be 
poorly documented...  

GH