From owner-freebsd-hackers@FreeBSD.ORG Tue Jan 23 08:01:39 2007 Return-Path: X-Original-To: freebsd-hackers@freebsd.org Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 3FC9716A402 for ; Tue, 23 Jan 2007 08:01:39 +0000 (UTC) (envelope-from silby@silby.com) Received: from relay01.pair.com (relay01.pair.com [209.68.5.15]) by mx1.freebsd.org (Postfix) with SMTP id D4C0413C44C for ; Tue, 23 Jan 2007 08:01:38 +0000 (UTC) (envelope-from silby@silby.com) Received: (qmail 4466 invoked from network); 23 Jan 2007 08:01:23 -0000 Received: from unknown (HELO localhost) (unknown) by unknown with SMTP; 23 Jan 2007 08:01:23 -0000 X-pair-Authenticated: 209.68.2.70 Date: Tue, 23 Jan 2007 02:01:20 -0600 (CST) From: Mike Silbersack To: perryh@pluto.rain.com In-Reply-To: <45b5027e.g8Hs/VOZs+63TD6V%perryh@pluto.rain.com> Message-ID: <20070123020013.I16240@odysseus.silby.com> References: <20070119201935.GA60202@x12.dk> <20070120024614.E99400@odysseus.silby.com> <20070122083727.GA61615@qlovarnika.bg.datamax> <45b5027e.g8Hs/VOZs+63TD6V%perryh@pluto.rain.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: vd@freebsd.org, xride@x12.dk, freebsd-hackers@freebsd.org Subject: Re: Where to start? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 Jan 2007 08:01:39 -0000 On Mon, 22 Jan 2007, perryh@pluto.rain.com wrote: > I would guess that if a way could be found to preallocate the > journal space (as with mkfile(8) in sufficiently-old systems), > and then record its location in a reasonably-secure location > (the superblock?), it could be accessed during recovery without > reference to possibly-corrupt filesystem metadata. That's the kind of approach I was thinking of. I'm sure it would be a bit of work, but it would be cool. Mike "Silby" Silbersack