From owner-freebsd-current@FreeBSD.ORG Tue Apr 20 22:15:48 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 C7BE4106577D for ; Tue, 20 Apr 2010 22:15:48 +0000 (UTC) (envelope-from jroberson@jroberson.net) Received: from mail-qy0-f181.google.com (mail-qy0-f181.google.com [209.85.221.181]) by mx1.freebsd.org (Postfix) with ESMTP id 8DEDB8FC1B for ; Tue, 20 Apr 2010 22:15:48 +0000 (UTC) Received: by qyk11 with SMTP id 11so7160120qyk.13 for ; Tue, 20 Apr 2010 15:15:47 -0700 (PDT) Received: by 10.224.39.76 with SMTP id f12mr2455008qae.304.1271801747666; Tue, 20 Apr 2010 15:15:47 -0700 (PDT) Received: from [10.0.1.198] (udp022762uds.hawaiiantel.net [72.234.79.107]) by mx.google.com with ESMTPS id 5sm27348630qwg.0.2010.04.20.15.15.45 (version=SSLv3 cipher=RC4-MD5); Tue, 20 Apr 2010 15:15:47 -0700 (PDT) Date: Tue, 20 Apr 2010 12:15:48 -1000 (HST) From: Jeff Roberson X-X-Sender: jroberson@desktop To: current@freebsd.org Message-ID: User-Agent: Alpine 2.00 (BSF 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII Cc: Subject: 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: Tue, 20 Apr 2010 22:15:48 -0000 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. Thanks, Jeff