From owner-freebsd-hackers@FreeBSD.ORG Fri Feb 13 08:04:52 2004 Return-Path: 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 E65FC16A4CE for ; Fri, 13 Feb 2004 08:04:52 -0800 (PST) Received: from lakemtao04.cox.net (lakemtao04.cox.net [68.1.17.241]) by mx1.FreeBSD.org (Postfix) with ESMTP id 75D4B43D2F for ; Fri, 13 Feb 2004 08:04:52 -0800 (PST) (envelope-from A.J.Caines@halplant.com) Received: from mail.halplant.com ([68.100.162.49]) by lakemtao04.cox.net (InterMail vM.5.01.06.05 201-253-122-130-105-20030824) with ESMTP id <20040213160452.ZQLQ19895.lakemtao04.cox.net@mail.halplant.com> for ; Fri, 13 Feb 2004 11:04:52 -0500 Received: by mail.halplant.com (Postfix, from userid 1001) id 32F88B3; Fri, 13 Feb 2004 11:04:51 -0500 (EST) Date: Fri, 13 Feb 2004 11:04:51 -0500 From: Andrew J Caines To: FreeBSD Hackers Message-ID: <20040213160451.GB13347@hal9000.halplant.com> Mail-Followup-To: FreeBSD Hackers Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Organization: H.A.L. Plant X-PGP-Fingerprint: C59A 2F74 1139 9432 B457 0B61 DDF2 AA61 67C3 18A1 X-Powered-by: FreeBSD 4.9-STABLE X-URL: http://halplant.com:88/ X-Yahoo-Profile: AJ_Z0 X-ICQ: 283813972 Importance: Normal User-Agent: Mutt/1.5.6i Subject: malloc backed md/mfs filesystem swapped? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: Andrew J Caines List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Feb 2004 16:04:53 -0000 After Ring the various FMs including, but not limited to, mdmfs(8), mdconfig(8) malloc(9), I am unclear whether of not the memory used by md of type MD_MALLOC is kernel memory which will not be swapped, or not. On the same subject, does the the MD_SWAP backed device simply use swapable userland VM or does it specifically use a piece of the (presumably) disk backed swap partition? FYI, the relevant fstab entries for a malloc backed disk having a UFS2 with softupdates and async would look like: md /tmp mfs rw,-M,-s128m,async 2 0 md /var/run mfs rw,-M,-s1m,async 2 0 -Andrew- -- _______________________________________________________________________ | -Andrew J. Caines- Unix Systems Engineer A.J.Caines@halplant.com | | "They that can give up essential liberty to obtain a little temporary | | safety deserve neither liberty nor safety" - Benjamin Franklin, 1759 |