From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932582AbWFTKk7 (ORCPT ); Tue, 20 Jun 2006 06:40:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932576AbWFTKk7 (ORCPT ); Tue, 20 Jun 2006 06:40:59 -0400 Received: from ecfrec.frec.bull.fr ([129.183.4.8]:21221 "EHLO ecfrec.frec.bull.fr") by vger.kernel.org with ESMTP id S932574AbWFTKk5 (ORCPT ); Tue, 20 Jun 2006 06:40:57 -0400 Message-ID: <4497D0A9.6060704@bull.net> Date: Tue, 20 Jun 2006 12:40:41 +0200 From: Laurent Vivier Organization: Bull S.A.S. User-Agent: Thunderbird 1.5.0.2 (X11/20060420) MIME-Version: 1.0 To: Jeff Garzik Cc: Qi Yong , Linus Torvalds , Andrew Morton , "Stephen C. Tweedie" , "ext2-devel@lists.sourceforge.net" , linux-kernel , Mingming Cao , linux-fsdevel@vger.kernel.org, alex@clusterfs.com, Andreas Dilger Subject: Re: [Ext2-devel] [RFC 0/13] extents and 48bit ext3 References: <1149816055.4066.60.camel@dyn9047017069.beaverton.ibm.com> <4488E1A4.20305@garzik.org> <20060609083523.GQ5964@schatzie.adilger.int> <44898EE3.6080903@garzik.org> <1149885135.5776.100.camel@sisko.sctweedie.blueyonder.co.uk> <4497927F.4070307@fc-cn.com> <4497B126.4000408@bull.net> <4497B230.5000508@garzik.org> <4497BE00.1040409@bull.net> <4497C485.7000400@garzik.org> In-Reply-To: <4497C485.7000400@garzik.org> X-Enigmail-Version: 0.94.0.0 X-MIMETrack: Itemize by SMTP Server on ECN002/FR/BULL(Release 5.0.12 |February 13, 2003) at 20/06/2006 12:44:45, Serialize by Router on ECN002/FR/BULL(Release 5.0.12 |February 13, 2003) at 20/06/2006 12:44:47, Serialize complete at 20/06/2006 12:44:47 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig1EB8216EEB9A54DB7037A0B3" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig1EB8216EEB9A54DB7037A0B3 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Jeff Garzik wrote: > Laurent Vivier wrote: >> Jeff Garzik wrote: >>> Laurent Vivier wrote: >>>> Qi Yong wrote: >>>>> Linus Torvalds wrote: >>>>> >>>>>> On Fri, 9 Jun 2006, Stephen C. Tweedie wrote: >>>>>> =20 >>>>>> >>>>>>> When is the Linux syscall interface enough? When should we just >>>>>>> bump it >>>>>>> and cut out all the compatibility interfaces? >>>>>>> >>>>>>> No, we don't; we let people configure certain obsolete bits out >>>>>>> (a.out >>>>>>> support etc), but we keep it in the tree despite the indirection >>>>>>> cost to >>>>>>> maintain multiple interfaces etc. >>>>>>> =20 >>>>>> Right. WE ADD NEW SYSTEM CALLS. WE DO NOT EXTEND THE OLD ONES IN >>>>>> WAYS THAT MIGHT BREAK OLD USERS. >>>>>> >>>>>> Your point was exactly what? >>>>>> >>>>>> Btw, where did that 2TB limit number come from? Afaik, it should b= e >>>>>> 16TB for a 4kB filesystem, no? >>>>>> =20 >>>>>> >>>>> Partition tables describe partitions in units of one sector. >>>>> 2^(32+9) =3D 2T >>>>> >>>>> To prevent integer overflow, we should use only 31 bits of a 32-bit= >>>>> integer. >>>>> 2^(31+12) =3D 8T >>>>> >>>>> There's _terrible_ hacks to really get to 16T. >>>>> >>>>> -- qiyong >>>>> >>>> IMHO, a simple solution is to use "Logical Volume Manager" instead o= f >>>> partition >>>> manager: we create 64bit filesystem in a Logical Volume, not in a >>>> partition. >>> That doesn't solve anything, if you are not using a 64bit filesystem.= >> >> Sorry, I don't undestand why ??? >> >> You can use 32bit filesystem too, but you limit the size of the >> logical volume >> to be compatible with the filesystem you use. LVM allows to create >> several 32bit >> volumes on a big (> 8T) disk (if exists) >=20 > Let's review the thread: >=20 > qiyong: exist in the filesystem > you: bust those limits with LVM! >=20 > I think you are misunderstanding the subthread. >=20 Yes... I understood: qiyong: exist in the partition manager. (because with patches proposed on http://www.bullopensource.org/ext4 thes= e limits don't exist anymore in the filesystem.) Regards, Laurent --=20 Laurent Vivier Bull, Architect of an Open World (TM) http://www.bullopensource.org/ext4 --------------enig1EB8216EEB9A54DB7037A0B3 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.7 (GNU/Linux) iD8DBQFEl9Cv9Kffa9pFVzwRAsbiAKCOf70EE56Tk1XGkNwibp3VSnY0vgCfQO1v IFStSksvLJM8UkQl/c0pNJA= =/jhJ -----END PGP SIGNATURE----- --------------enig1EB8216EEB9A54DB7037A0B3--