Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262706AbVDYSV5 (ORCPT ); Mon, 25 Apr 2005 14:21:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262720AbVDYSTh (ORCPT ); Mon, 25 Apr 2005 14:19:37 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:61088 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S262713AbVDYSSk (ORCPT ); Mon, 25 Apr 2005 14:18:40 -0400 Date: Mon, 25 Apr 2005 19:18:31 +0100 From: Christoph Hellwig To: Luben Tuikov Cc: Christoph Hellwig , SCSI Mailing List , Linux Kernel Mailing List , andrew.patterson@hp.com, Eric.Moore@lsil.com, mike.miller@hp.com, dougg@torque.net, Madhuresh_Nagshain@adaptec.com Subject: Re: [RFC] SAS domain layout for Linux sysfs Message-ID: <20050425181831.GA14190@infradead.org> Mail-Followup-To: Christoph Hellwig , Luben Tuikov , SCSI Mailing List , Linux Kernel Mailing List , andrew.patterson@hp.com, Eric.Moore@lsil.com, mike.miller@hp.com, dougg@torque.net, Madhuresh_Nagshain@adaptec.com References: <425D392F.2080702@adaptec.com> <20050424111908.GA23010@infradead.org> <426D1572.70508@adaptec.com> <20050425161411.GA11938@infradead.org> <426D2723.8070308@adaptec.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <426D2723.8070308@adaptec.com> User-Agent: Mutt/1.4.1i X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1155 Lines: 27 On Mon, Apr 25, 2005 at 01:21:39PM -0400, Luben Tuikov wrote: > You're are stating that: > 1) You "only ever care about what's seen from a HA", > 2) "if you have muliple SPI cards that are on a single parallel > bus you'll have the same bus represented twice" > 3) "we have a scsi_device object for every lun > that's seen from a hba, linked to the HBAs Scsi_Host object > and not one shared by multiple HBAs" > > So in effect, you _want_ duplication, right? This is perfectly OK. > In fact it is desirable (and has never been under question). Yes. > This isn't directly related to the RFC. The RFC basically > outlines the result of *a SAS discovery process*. The discovery > process/LLDD can register the LU many times. This has *never* been an > issue of discussion. The point is that discovery must happen for each HBA separately because we absolutely do not want to have global state. - 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/