From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755837AbYKEJd7 (ORCPT ); Wed, 5 Nov 2008 04:33:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753941AbYKEJdv (ORCPT ); Wed, 5 Nov 2008 04:33:51 -0500 Received: from mx2.redhat.com ([66.187.237.31]:39416 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753670AbYKEJdu (ORCPT ); Wed, 5 Nov 2008 04:33:50 -0500 Date: Wed, 5 Nov 2008 10:33:44 +0100 From: Karel Zak To: Andrey Borzenkov Cc: Linux Kernel Mailing List Subject: Re: 2.6.28-rc3: kernel mounts the same device twice? Or /proc/mounts lies? Message-ID: <20081105093344.GA7791@nb.net.home> References: <200811041213.07717.arvidjaar@mail.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200811041213.07717.arvidjaar@mail.ru> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 04, 2008 at 12:13:07PM +0300, Andrey Borzenkov wrote: > And according to /proc/mounts both are mounted at the same time: > > {pts/0}% cat /proc/mounts > rootfs / rootfs rw 0 0 > /dev/root / reiserfs rw 0 0 > /dev /dev tmpfs rw 0 0 > /proc /proc proc rw 0 0 > /sys /sys sysfs rw 0 0 > /proc/bus/usb /proc/bus/usb usbfs rw,devgid=43,devmode=664 0 0 > none /dev/pts devpts rw,mode=620 0 0 > none /dev/shm tmpfs rw 0 0 > none /tmp tmpfs rw 0 0 > none /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0 > /dev/sda2 /media/hd reiserfs rw 0 0 > {pts/0}% ll /dev/root > brw------- 1 root root 8, 2 2008-11-04 12:01 /dev/root > {pts/0}% ll /dev/sda2 > brw-rw---- 1 root disk 8, 2 2008-11-04 12:01 /dev/sda2 > > Bug or feature? Feature. This is typical FAQ-like question. # mount /dev/sda2 /mnt/test # mount /dev/sda2 /mnt/test2 # df | grep sda2 /dev/sda2 14877092 168740 13940448 2% /mnt/test /dev/sda2 14877092 168740 13940448 2% /mnt/test2 Karel -- Karel Zak