Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S271826AbTG2OKV (ORCPT ); Tue, 29 Jul 2003 10:10:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S271816AbTG2OJ7 (ORCPT ); Tue, 29 Jul 2003 10:09:59 -0400 Received: from camus.xss.co.at ([194.152.162.19]:42507 "EHLO camus.xss.co.at") by vger.kernel.org with ESMTP id S271815AbTG2OIq (ORCPT ); Tue, 29 Jul 2003 10:08:46 -0400 Message-ID: <3F267FD7.4040400@xss.co.at> Date: Tue, 29 Jul 2003 16:08:23 +0200 From: Andreas Haumer Organization: xS+S User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3) Gecko/20030312 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Marcelo Tosatti CC: lkml , alan@lxorguk.ukuu.org.uk Subject: 2.4.22-pre4: devfs on initrd stays busy after pivot_root References: In-Reply-To: X-Enigmail-Version: 0.74.0.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2357 Lines: 76 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi! Marcelo Tosatti wrote: > Hi, > > Here goes -pre4. It contains a lot of updates and fixes. > > We decided to include this new code quota code which allows usage of > quotas with 32bit UID/GIDs. > > Most Toshibas should work now due to an important ACPI fix. > > Please help and test. > Beginning with 2.4.22-pre4 I can't unmount devfs on my initial ramdisk anymore because of EBUSY I use initrd and let the kernel mount devfs on /dev on boot. I then set up all the drivers needed to mount the real root device, do a "pivot_root" and continue with /sbin/init, just like it is described in Documentation/initrd.txt When the boot process is finished, filesystems are mounted as follows: root@install:~ {520} $ mount rootfs on / type rootfs (rw) /dev/root on /initrd type romfs (ro) none on /initrd/dev type devfs (rw) /dev/ide/host0/bus0/target0/lun0/part3 on / type ext2 (rw) devfs on /dev type devfs (rw) proc on /proc type proc (rw) I then want to get rid of everything mounted under /initrd root@install:~ {521} $ umount /initrd/dev umount: /initrd/dev: device is busy This used to work just fine with 2.4.21 and 2.4.22-pre[123] It does not work with 2.4.22-pre4 and 2.4.22-pre8 Also, with linux-2.4.21-ac4 unmounting /initrd/dev does not work. I made a diff between pre3 and pre4 and some changes in fs/exec.c, fs/binfmt_elf.c and kernel/fork.c (around new function "unshare_files()") look suspicious to me. I find these changes in both 2.4.21-ac4 and 2.4.22-pre4 patchset (but I'm not a kernel hacker, so I might be wrong) Any idea anyone? - - andreas - -- Andreas Haumer | mailto:andreas@xss.co.at *x Software + Systeme | http://www.xss.co.at/ Karmarschgasse 51/2/20 | Tel: +43-1-6060114-0 A-1100 Vienna, Austria | Fax: +43-1-6060114-71 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQE/Jn/MxJmyeGcXPhERApunAKCIUOiZh8kSaeJEXHwj06yBlvMnhQCfe9M3 hfmnS3VtpDx5sCMq5nlJLmU= =1Tnh -----END PGP SIGNATURE----- - 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/