From owner-freebsd-hackers Mon Mar 10 13:32:16 2003 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 2887337B401 for ; Mon, 10 Mar 2003 13:32:15 -0800 (PST) Received: from mail.halplant.com (ip68-98-167-210.nv.nv.cox.net [68.98.167.210]) by mx1.FreeBSD.org (Postfix) with ESMTP id 77F7643F85 for ; Mon, 10 Mar 2003 13:32:14 -0800 (PST) (envelope-from A.J.Caines@halplant.com) Received: by mail.halplant.com (Postfix, from userid 1001) id 9F994A8; Mon, 10 Mar 2003 16:32:13 -0500 (EST) Date: Mon, 10 Mar 2003 16:32:13 -0500 From: Andrew J Caines To: hackers@FreeBSD.org Subject: Re: mount_null evil ? Message-ID: <20030310213213.GE87518@hal9000.halplant.com> Reply-To: Andrew J Caines Mail-Followup-To: hackers@FreeBSD.org References: <20030310132402.GA93784@LF.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030310132402.GA93784@LF.net> Organization: H.A.L. Plant X-PGP-Fingerprint: C59A 2F74 1139 9432 B457 0B61 DDF2 AA61 67C3 18A1 X-Powered-by: FreeBSD 4.8-RC X-URL: http://halplant.com:88/ X-Yahoo-Profile: AJ_Z0 Importance: Normal User-Agent: Mutt/1.5.3i Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Marc, > I?m currently developing a jail-management solution - I use a > readonly mount_null for central software-management of the jails. > The manpage was written May 1, 1995 - is using this tool still dangerous I have used it for read-only mounts since way back and have not have any problems, including brief periods of high I/O. I'd have reservations allowing unique data on a read-write mount, however I just did a few quick and simple tests of reads and writes on a rw null mount on my 4.8-RC box with no apparent problem. -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 | To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message