From owner-freebsd-current Fri Feb 6 12:11:35 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id MAA16596 for current-outgoing; Fri, 6 Feb 1998 12:11:35 -0800 (PST) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from dyson.iquest.net (dyson.iquest.net [198.70.144.127]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id MAA16559 for ; Fri, 6 Feb 1998 12:11:23 -0800 (PST) (envelope-from toor@dyson.iquest.net) Received: (from root@localhost) by dyson.iquest.net (8.8.8/8.8.8) id PAA00937; Fri, 6 Feb 1998 15:10:58 -0500 (EST) (envelope-from toor) From: "John S. Dyson" Message-Id: <199802062010.PAA00937@dyson.iquest.net> Subject: Re: unionfs clobbers a file In-Reply-To: <199802061926.MAA15103@usr01.primenet.com> from Terry Lambert at "Feb 6, 98 07:26:08 pm" To: tlambert@primenet.com (Terry Lambert) Date: Fri, 6 Feb 1998 15:10:58 -0500 (EST) Cc: kato@migmatite.eps.nagoya-u.ac.jp, current@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL32 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG X-To-Unsubscribe: mail to majordomo@FreeBSD.org "unsubscribe current" Terry Lambert said: > > Pages are hung off the vnode, when the vnode pager is using the file > for backing store. > Pages are hung off of a VM object, which might optionally be aliased by multiple vnodes. > > The harder fix is to add a VOP_FINALVP to all local media filesystems. > Adding a VOP_FINALVP will allow an upper layer to get the backing > vnode for a VM object, not matter how buried by other stacks it becomes. > This fix will have three consequences: > I kind of like that. -- John | Never try to teach a pig to sing, dyson@freebsd.org | it just makes you look stupid, jdyson@nc.com | and it irritates the pig.