From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S272448AbTGZKaD (ORCPT ); Sat, 26 Jul 2003 06:30:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S272449AbTGZKaD (ORCPT ); Sat, 26 Jul 2003 06:30:03 -0400 Received: from mx02.qsc.de ([213.148.130.14]:45018 "EHLO mx02.qsc.de") by vger.kernel.org with ESMTP id S272448AbTGZK37 (ORCPT ); Sat, 26 Jul 2003 06:29:59 -0400 Date: Sat, 26 Jul 2003 12:45:06 +0200 From: Wiktor Wodecki To: Balram Adlakha Cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.0-test1 devfs question Message-ID: <20030726104506.GA663@gmx.de> References: <20030725185325.GA3944@localhost.localdomain> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="zYM0uCDKw75PZbzx" Content-Disposition: inline In-Reply-To: <20030725185325.GA3944@localhost.localdomain> X-message-flag: Linux - choice of the GNU generation X-Operating-System: Linux 2.6.0-test1-mm2-O8 i686 X-PGP-KeyID: 182C9783 X-Info: X-PGP-KeyID, send an email with the subject 'public key request' to wodecki@gmx.de User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --zYM0uCDKw75PZbzx Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Jul 26, 2003 at 12:23:25AM +0530, Balram Adlakha wrote: > >Hello, >=20 > >I'm currently running at 2.6.0-test1-mm2-O8 and I wanted to give devfs a > >shot. I recompiled the kernel with the following settings: > >CONFIG_DEVFS_FS=3Dy > >CONFIG_DEVFS_MOUNT=3Dy > ># CONFIG_DEVFS_DEBUG is not set >=20 > >As I read through the documentation (btw, devfs=3Dnomount is mentioned in > >configure help but not in Documentation/filesystems/devfs/boot-options) > >I got the understanding that this shouldn't make any difference to the > >system right? After booting with this kernel there were lots of proper > >devfs devices in my dmesg (host0/ide0... scsi0/...) however, the system > >didn't came up (couldn't mount rootfs). It didn't even work when I > >enabled CONFIG_DEVFS_MOUNT. >=20 > >I'm not sure whether this is a bug in mount/nomount of devfs or if it's > >somewhere my fault/setup (root on raid1, various lvm2 devices on raid1/0 > >devices) >=20 > >Any help would be greatly appreciated. >=20 >=20 > You need to change your /etc/fstab to reflect the new devfs device names, > ex: "/dev/discs/disc0/part1" instead of "/dev/hda1". You can also use dev= fsd (or some alternative) to make synlinks to the older devices and retain = permissions etc... Also, without devfsd you cannot expect module autoloadin= g as modules can't be automatically loaded when theres no device requesting= them (in this case the device simply doesn't exist until module is loaded) wait a second, this is a dumb thing to do. I do not want to migrate over to devfs yet. I wanted to give it a shot and look around a bit. What I haad in mind was mounting it on /dev2 or similar. Enabling this option and converting my whole system is not a migration path. That's just plain luck (might be easy for plain ide/scsi disks, but whatabout metadevices like lvm and raid?). It is written in the documentation that devfs comes with most backwards compatibility. I expected there to be things like /dev/md0 and such for compatibility. OTOH what's CONFIG_DEVFS_MOUNT for then? If devices get named the other way round I *have* to mount it anyway, haven't I? I think improvements must happen here in order to make devfs usable. --=20 Regards, Wiktor Wodecki --zYM0uCDKw75PZbzx Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.2 (GNU/Linux) iD8DBQE/Iluy6SNaNRgsl4MRAkmtAJ9Sbmg9lFm+uJ2TKC9vbuX9tovI4wCeK8C0 dylxsigbLtsmEU+4+QVoONc= =b6ck -----END PGP SIGNATURE----- --zYM0uCDKw75PZbzx--