Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263227AbUDPXl7 (ORCPT ); Fri, 16 Apr 2004 19:41:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263981AbUDPXl5 (ORCPT ); Fri, 16 Apr 2004 19:41:57 -0400 Received: from palrel12.hp.com ([156.153.255.237]:36741 "EHLO palrel12.hp.com") by vger.kernel.org with ESMTP id S263227AbUDPXkb (ORCPT ); Fri, 16 Apr 2004 19:40:31 -0400 Date: Fri, 16 Apr 2004 16:39:44 -0700 From: Grant Grundler To: Greg KH Cc: Keiichiro Tokunaga , lhcs-devel@lists.sourceforge.net, lhms-devel@lists.sourceforge.net, linux-hotplug-devel@lists.sourceforge.net, pcihpd-discuss@lists.sourceforge.net, lhns-devel@lists.sourceforge.net, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, acpi-largesys-devel@lists.sourceforge.net Subject: Re: [Pcihpd-discuss] [RFC] New sysfs tree for hotplug Message-ID: <20040416233944.GF24556@cup.hp.com> References: <20040415170939.0ff62618.tokunaga.keiich@jp.fujitsu.com> <20040416223436.GB21701@kroah.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040416223436.GB21701@kroah.com> User-Agent: Mutt/1.5.5.1+cvs20040105i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1526 Lines: 35 On Fri, Apr 16, 2004 at 03:34:36PM -0700, Greg KH wrote: > > Recent large machines have many PCI devices and some boards that > > contain devices (e.g. CPU, memory, and/or I/O devices). A certain PCI > > device (PCI1) might be connected with other one (PCI2), which means that > > there is a dependency between PCI1 and PCI2. > > You have this today? I interpreted his comments to mean PCI-PCI Bridges. eg something like a 4-port NIC which usually has a PCI-PCI bridge to "isolate" multiple PCI devices (NICs): +-[60]---01.0-[61]--+-04.0 Digital Equipment Corporation DECchip 21142/43 | +-05.0 Digital Equipment Corporation DECchip 21142/43 | +-06.0 Digital Equipment Corporation DECchip 21142/43 | \-07.0 Digital Equipment Corporation DECchip 21142/43 ... I thought this was already handled though so I may be misunderstanding. Keiichiro, an example would be very helpful in understanding. ... > Hm, no. What about usb, firewire, scsi and any other future bus that > can be "hotpluggable". The kernel doesn't treat them differently, and > we shouldn't either. SCSI has a heirarchy as well. Ie LUNs can be removed without removing the target (RAID controllers). Normal JBOD use equates LUNs and targets. grant - 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/