Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268972AbUIQU1r (ORCPT ); Fri, 17 Sep 2004 16:27:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268977AbUIQU1q (ORCPT ); Fri, 17 Sep 2004 16:27:46 -0400 Received: from turing-police.cc.vt.edu ([128.173.14.107]:60295 "EHLO turing-police.cc.vt.edu") by vger.kernel.org with ESMTP id S268972AbUIQU1m (ORCPT ); Fri, 17 Sep 2004 16:27:42 -0400 Message-Id: <200409172027.i8HKRVwY005444@turing-police.cc.vt.edu> X-Mailer: exmh version 2.7.1 07/26/2004 with nmh-1.1-RC3 To: Eric Mudama Cc: David Stevens , Netdev , leonid.grossman@s2io.com, Linux Kernel Subject: Re: The ultimate TOE design In-Reply-To: Your message of "Fri, 17 Sep 2004 00:46:59 MDT." <311601c90409162346184649eb@mail.gmail.com> From: Valdis.Kletnieks@vt.edu References: <4148991B.9050200@pobox.com> <311601c90409162346184649eb@mail.gmail.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_-239910029P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Fri, 17 Sep 2004 16:27:31 -0400 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1465 Lines: 39 --==_Exmh_-239910029P Content-Type: text/plain; charset=us-ascii On Fri, 17 Sep 2004 00:46:59 MDT, Eric Mudama said: > On Wed, 15 Sep 2004 14:11:04 -0600, David Stevens wrot e: > > Why don't we off-load filesystems to disks instead? > > Disks have had file systems on them since close to the beginning... No, he means "offload the processing of the filesystem to the disk itself". IBM's MVS systems basically did that - it used the disk's "Search Key" I/O opcodes to basically get the equivalent of doing namei() out on the disk itself (it did this for system catalog and PDS directory searches from the beginning, and added 'indexed VTOC' support in the mid-80s). So you'd send out a CCW (channel command word) stream that basically said "Find me the dataset USER3.ACCTING.TESTJOBS", and when the I/O completed, you'd have the DSCB (the moral equiv of an inode) ready to go. --==_Exmh_-239910029P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFBS0izcC3lWbTT17ARAoKMAJ4pA1BjsPb0sbxLDbLKM9jvox5srACeMV0V ZMot5U1QnkpacHYr8pIWeJM= =zjf/ -----END PGP SIGNATURE----- --==_Exmh_-239910029P-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/