Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764731AbXJPEV1 (ORCPT ); Tue, 16 Oct 2007 00:21:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752502AbXJPEVS (ORCPT ); Tue, 16 Oct 2007 00:21:18 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:52070 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751149AbXJPEVR (ORCPT ); Tue, 16 Oct 2007 00:21:17 -0400 Date: Mon, 15 Oct 2007 21:21:04 -0700 From: Greg KH To: Matthew Wilcox Cc: david@lang.hm, Rob Landley , Julian Calaby , Theodore Tso , James Bottomley , linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, Jens Axboe , Suparna Bhattacharya , Nick Piggin Subject: Re: What still uses the block layer? Message-ID: <20071016042104.GA7854@kroah.com> References: <200710112011.22000.rob@landley.net> <200710150304.00901.rob@landley.net> <646765f40710150206j75af4c4dwac4f4565451b64b1@mail.gmail.com> <200710150508.37332.rob@landley.net> <20071015173357.GB5738@kroah.com> <20071016040401.GA15744@parisc-linux.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20071016040401.GA15744@parisc-linux.org> User-Agent: Mutt/1.5.16 (2007-06-09) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1050 Lines: 25 On Mon, Oct 15, 2007 at 10:04:01PM -0600, Matthew Wilcox wrote: > On Mon, Oct 15, 2007 at 07:54:22PM -0700, david@lang.hm wrote: > > do PCI devices reorder their bus numbers spontaniously, or only if you > > change the hardware? > > The only system I've had that reordered PCI bus numbers was when I had a > partitionable system and changed the partitioning. Not quite "change > the hardware", but neither was it "spontaneous". It was certainly > unexpected (for me). > > Greg probably has quite different examples. Changing the hardware (adding a new PCI device or removing one) are the most common times this happens. But I have seen reports of this happening when you upgrade/downgrade BIOS versions, and, in some oops-we-messed-up cases, when we changed things in the kernel. thanks, greg k-h - 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/