Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932241AbVJCOSL (ORCPT ); Mon, 3 Oct 2005 10:18:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932246AbVJCOSL (ORCPT ); Mon, 3 Oct 2005 10:18:11 -0400 Received: from magic.adaptec.com ([216.52.22.17]:25027 "EHLO magic.adaptec.com") by vger.kernel.org with ESMTP id S932241AbVJCOSJ (ORCPT ); Mon, 3 Oct 2005 10:18:09 -0400 Message-ID: <43413D9C.2050904@adaptec.com> Date: Mon, 03 Oct 2005 10:18:04 -0400 From: Luben Tuikov User-Agent: Mozilla Thunderbird 1.0.6 (X11/20050716) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Jeff Garzik CC: Kyle Moffett , Andre Hedrick , "David S. Miller" , willy@w.ods.org, patmans@us.ibm.com, ltuikov@yahoo.com, linux-kernel@vger.kernel.org, akpm@osdl.org, torvalds@osdl.org, linux-scsi@vger.kernel.org, James Bottomley Subject: Re: I request inclusion of SAS Transport Layer and AIC-94xx into the kernel References: <433D8542.1010601@adaptec.com> <433D8D1F.1030005@adaptec.com> <0F03AA4B-D2D1-4C57-B81B-FC95CB863A98@mac.com> <433DB8AF.4090207@adaptec.com> <433DD95C.5050209@pobox.com> In-Reply-To: <433DD95C.5050209@pobox.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 03 Oct 2005 14:18:05.0772 (UTC) FILETIME=[45A518C0:01C5C825] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2061 Lines: 64 On 09/30/05 20:33, Jeff Garzik wrote: > Luben Tuikov wrote: > >>But none of the ideas: 64 bit LUN, HCIL removal, etc., >>were accepted with "submit a patch". > > > I concede this may have been the response in the past. Its not, now. > > > > >>>So you're saying fixing the current SCSI subsystem once *now* costs >>>more than applying all *future* SCSI fixes to _two_ SCSI subsystems, >>>handling bug reports for _two_ SCSI subsystems, etc. >> >> >>I'm saying that the current "old" one is already obsolete, >>when all you have is a SAS chip on your mainboard. >> >>All you need is a small, tiny, fast, slim SCSI Core. > > > Then don't use it at all. Write a block driver, if you really feel we > need two SCSI cores. > > > >>Politics: "Nah, whatever you say, specs are *crap* and we'll >>do it our way. We are not interested in your way, even if it >>were better. Oh, and BTW, REQUEST SENSE clears ACA and LUN >>is a u64." > > > This is a misrepresentation. -We- understand the stuff you have posted. > > But you continue to demonstrate that you simply do not understand the > existing SCSI core code. > > The SAS transport class supports commonality across all SAS > implementations. This includes both MPT and Adaptec 94xx. > > SAS transport class + libsas supports software implementations of SAS, > including transport layer management. This includes Adaptec 94xx but > NOT MPT. You almost get it right, other than the layering infrastructure. The SAS Transport Layer is a layer in its own right. It is not a "libsas". MPT and open transport a very different, one hides the transport, i.e. the transport layer is in firmware; the other exposes it and needs a transport layer. See the pictures here: http://marc.theaimsgroup.com/?l=linux-kernel&m=112810649712793&w=2 Luben - 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/