Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261249AbTHZRdq (ORCPT ); Tue, 26 Aug 2003 13:33:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262316AbTHZRdq (ORCPT ); Tue, 26 Aug 2003 13:33:46 -0400 Received: from gate.in-addr.de ([212.8.193.158]:20889 "EHLO mx.in-addr.de") by vger.kernel.org with ESMTP id S261249AbTHZRcy (ORCPT ); Tue, 26 Aug 2003 13:32:54 -0400 Date: Tue, 26 Aug 2003 19:30:14 +0200 From: Lars Marowsky-Bree To: Neil Brown , Marcelo Tosatti , linux-kernel@vger.kernel.org, Mike Fedyk Subject: Re: md: bug in file raid5.c, line 540 was: Re: Linux 2.4.22-rc1 Message-ID: <20030826173014.GA12071@marowsky-bree.de> References: <20030819202629.GA4083@matchmail.com> <20030819210913.GC4083@matchmail.com> <16197.43294.828878.586018@gargle.gargle.HOWL> <20030822155039.GA6980@marowsky-bree.de> <20030822212659.GK1040@matchmail.com> <20030823152826.GB9239@marowsky-bree.de> <20030826172257.GE16831@matchmail.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="ReaqsoxgOBHFXBhH" Content-Disposition: inline In-Reply-To: <20030826172257.GE16831@matchmail.com> User-Agent: Mutt/1.4i X-Ctuhulu: HASTUR Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1779 Lines: 53 --ReaqsoxgOBHFXBhH Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2003-08-26T10:22:57, Mike Fedyk said: > Is there any way to get it working on one partition, or does it require at > least two backing store block (an actual physical disk) devices that a bu= nch > of loop devices point to? (I'm thinking of the raid[15] case). md will work just fine - although with much reduced performance - if setup on top of partitions on the same disk. If all you have is a single physical disk, you can create the loop devices accordingly. For multipath testing, I have used LVM logical volumes + loop devices to simulate such, or used UML and fed it with a bunch of block devices (LVs or loop devices) from the host. (The mp-test.sh script actually knows how to create arbitary numbers of loop devices for multipath testing, which in turn uncovered a bug in our loop handling, which axboe took care of...) Sincerely, Lars Marowsky-Br=E9e --=20 High Availability & Clustering ever tried. ever failed. no matter. SuSE Labs try again. fail again. fail better. Research & Development, SuSE Linux AG -- Samuel Beckett --ReaqsoxgOBHFXBhH Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.7 (GNU/Linux) iD8DBQE/S5kmudf3XQV4S2cRAv9HAJ93OcIt03+TCW4vsctr/taQkutKAgCgg0ox 5XjEVcaKhBTAxsqNQi+kVgw= =zirE -----END PGP SIGNATURE----- --ReaqsoxgOBHFXBhH-- - 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/