From owner-freebsd-hackers@FreeBSD.ORG Wed Jun 24 07:58:16 2009 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 163CC106564A for ; Wed, 24 Jun 2009 07:58:16 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from mail10.syd.optusnet.com.au (mail10.syd.optusnet.com.au [211.29.132.191]) by mx1.freebsd.org (Postfix) with ESMTP id 944888FC18 for ; Wed, 24 Jun 2009 07:58:15 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from server.vk2pj.dyndns.org (c122-106-216-167.belrs3.nsw.optusnet.com.au [122.106.216.167]) by mail10.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id n5O7wCCP027074 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 24 Jun 2009 17:58:12 +1000 X-Bogosity: Ham, spamicity=0.000000 Received: from server.vk2pj.dyndns.org (localhost.vk2pj.dyndns.org [127.0.0.1]) by server.vk2pj.dyndns.org (8.14.3/8.14.3) with ESMTP id n5O7wBS8000602; Wed, 24 Jun 2009 17:58:11 +1000 (EST) (envelope-from peter@server.vk2pj.dyndns.org) Received: (from peter@localhost) by server.vk2pj.dyndns.org (8.14.3/8.14.3/Submit) id n5O7wBDl000601; Wed, 24 Jun 2009 17:58:11 +1000 (EST) (envelope-from peter) Date: Wed, 24 Jun 2009 17:58:11 +1000 From: Peter Jeremy To: Nirmal Thacker Message-ID: <20090624075811.GA463@server.vk2pj.dyndns.org> References: <87429ffe0906231252j7c84489dt6ebd60333654f411@mail.gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Dxnq1zWXvFF0Q93v" Content-Disposition: inline In-Reply-To: <87429ffe0906231252j7c84489dt6ebd60333654f411@mail.gmail.com> X-PGP-Key: http://members.optusnet.com.au/peterjeremy/pubkey.asc User-Agent: Mutt/1.5.19 (2009-01-05) Cc: freebsd-hackers@freebsd.org Subject: Re: Dump Utility cache efficiency analysis 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: Wed, 24 Jun 2009 07:58:16 -0000 --Dxnq1zWXvFF0Q93v Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2009-Jun-23 15:52:04 -0400, Nirmal Thacker wr= ote: >I would first like to understand the opinions of anyone who has looked at >this problem or think this would be a worthwhile project to start off with. I'm aware of the following references: http://www.mavetju.org/mail/view_message.php?list=3Dfreebsd-hackers&id=3D37= 5676 http://www.mavetju.org/mail/view_thread.php?list=3Dfreebsd-stable&id=3D1335= 519&thread=3Dyes >1. Installing a stable FreeBSD build >2. Check out a version of the Build suitable for the project Any changes will need to apply to FreeBSD -current, though they may be back-ported once tested. This means that you will need a -current system at some point. 8-current is reasonably stable at this point and would be my suggestion. >3. Pointers to begin studying the current implementation in the code-tree >structure (would I expect it to lie in the fs/ directory?). I tried to find >it in the FreeBSD cross reference (http://fxr.watson.org/) The code is in src/sbin/dump. It references various system header files in order to understand the UFS on-disk format. >Lastly- does this project require the know-how's of device drivers? If so,= I >would have to work harder. No. Dump is completely userland. --=20 Peter Jeremy --Dxnq1zWXvFF0Q93v Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (FreeBSD) iEYEARECAAYFAkpB3JMACgkQ/opHv/APuIdphgCgk9wumoN2rmfcRXvfs9jmSqoz pVkAnj099SHS0+bqFOnLrsiuyLcryQfX =fsEv -----END PGP SIGNATURE----- --Dxnq1zWXvFF0Q93v--