From owner-freebsd-current@FreeBSD.ORG Wed Apr 21 07:29:47 2010 Return-Path: Delivered-To: current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 060C51065673 for ; Wed, 21 Apr 2010 07:29:47 +0000 (UTC) (envelope-from jroberson@jroberson.net) Received: from mail-yw0-f193.google.com (mail-yw0-f193.google.com [209.85.211.193]) by mx1.freebsd.org (Postfix) with ESMTP id BF5D98FC17 for ; Wed, 21 Apr 2010 07:29:46 +0000 (UTC) Received: by ywh31 with SMTP id 31so3470952ywh.3 for ; Wed, 21 Apr 2010 00:29:46 -0700 (PDT) Received: by 10.101.22.6 with SMTP id z6mr16167938ani.245.1271834985969; Wed, 21 Apr 2010 00:29:45 -0700 (PDT) Received: from [10.0.1.198] (udp022762uds.hawaiiantel.net [72.234.79.107]) by mx.google.com with ESMTPS id 30sm65361724anp.11.2010.04.21.00.29.43 (version=SSLv3 cipher=RC4-MD5); Wed, 21 Apr 2010 00:29:44 -0700 (PDT) Date: Tue, 20 Apr 2010 21:29:46 -1000 (HST) From: Jeff Roberson X-X-Sender: jroberson@desktop To: Patrick Tracanelli In-Reply-To: <4BCE291D.7070006@freebsdbrasil.com.br> Message-ID: References: <4BCE291D.7070006@freebsdbrasil.com.br> User-Agent: Alpine 2.00 (BSF 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: current@freebsd.org Subject: Re: HEADS UP: SUJ Going in to head today X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Apr 2010 07:29:47 -0000 On Tue, 20 Apr 2010, Patrick Tracanelli wrote: > Jeff Roberson escreveu: >> Hi Folks, >> >> You may have seen my other Soft-updates journaling (SUJ) announcements. >> If not, it is a journaling system that works cooperatively with >> soft-updates to eliminate the full background filesystem check after an >> unclean shutdown. SUJ may be enabled with tunefs -j enable and disabled >> with tunefs -j disable on an unmounted filesystem. It is backwards >> compatible with soft-updates with no journal. >> >> I'm going to do another round of tests and buildworld this afternoon to >> verify the diff and then I'm committing to head. This is a very large >> feature and fundamentally changes softupdates. Although it has been >> extensively tested by many there may be unforseen problems. If you run >> into an issue that you think may be suj please email me directly as well >> as posting on current as I sometimes miss list email and this will >> ensure the quickest response. > > Hello Jeff, McKusick and others envolved. > > Is an MFC technically possible? If so, are there plans to do so? I do have an 8 backport branch available although it is a little stale. I intend to keep it somewhat up to date. I think it will take some time before we have sufficient experience with SUJ in head before we want to put it back in 8. It is quite a complex and disruptive feature. Thanks, Jeff > > Thank you. > > -- > Patrick Tracanelli >