Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756642AbZFYRoU (ORCPT ); Thu, 25 Jun 2009 13:44:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753520AbZFYRoB (ORCPT ); Thu, 25 Jun 2009 13:44:01 -0400 Received: from acsinet11.oracle.com ([141.146.126.233]:28242 "EHLO acsinet11.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753061AbZFYRn7 (ORCPT ); Thu, 25 Jun 2009 13:43:59 -0400 To: John Robinson Cc: NeilBrown , "Martin K. Petersen" , Mike Snitzer , Linus Torvalds , Alasdair G Kergon , jens.axboe@oracle.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, linux-ide@vger.kernel.org, linux-fsdevel@vger.kernel.org, device-mapper development Subject: Re: [dm-devel] REQUEST for new 'topology' metrics to be moved out of the 'queue' sysfs directory. From: "Martin K. Petersen" Organization: Oracle References: <19010.62951.886231.96622@notabene.brown> <125b48b7ffc99a496fbdd512f38cada5.squirrel@neil.brown.name> <4A43612F.2000100@anonymous.org.uk> Date: Thu, 25 Jun 2009 13:43:23 -0400 In-Reply-To: <4A43612F.2000100@anonymous.org.uk> (John Robinson's message of "Thu, 25 Jun 2009 12:36:15 +0100") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.91 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Source-IP: abhmt006.oracle.com [141.146.116.15] X-Auth-Type: Internal IP X-CT-RefId: str=0001.0A090201.4A43B73F.0270:SCFSTAT5015188,ss=1,fgs=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1048 Lines: 25 >>>>> "John" == John Robinson writes: John> Even sadder, when a raid 0/4/5/6 is reshaped over more discs (and John> probably other scenarios outwith md), I'm not sure I agree with the whole "sad" sentiment. Just because ext[234] doesn't query devices automatically doesn't mean the technology doesn't exist. I wrote the MD/LVM extraction code for XFS in 2001. John> both stripe-width and stride-size change. Is there any prospect John> this new stacking could give us the opportunity to tell our client John> (LVM, filesystem, whatever) about the change, or that they'll be John> able to take advantage of it? When you resize the fs it would have to compare the new topology to the old one and adjust accordingly. -- Martin K. Petersen Oracle Linux Engineering -- 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/