From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 3 Jan 2001 17:39:23 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 3 Jan 2001 17:39:12 -0500 Received: from 64.124.41.10.napster.com ([64.124.41.10]:55313 "EHLO foobar.napster.com") by vger.kernel.org with ESMTP id ; Wed, 3 Jan 2001 17:38:57 -0500 Message-ID: <3A53A9FB.A3D558D9@napster.com> Date: Wed, 03 Jan 2001 14:38:51 -0800 From: Jordan Mendelson Organization: Napster, Inc. X-Mailer: Mozilla 4.76 [en] (X11; U; Linux 2.4.0-prerelease i686) X-Accept-Language: en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: 2.4.0-pre able to mount SHM twice 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 This is probably due to the source being 'none', but the shm mount point can be mounted twice at the same mount point. Shouldn't mount(2) return -EBUSY in this case? # cat /etc/mtab /dev/hda4 / ext2 rw,errors=remount-ro,errors=remount-ro 0 0 proc /proc proc rw 0 0 devpts /dev/pts devpts rw,gid=5,mode=620 0 0 /dev/hda1 /boot ext2 rw 0 0 /dev/hda3 /mnt/win vfat rw 0 0 none /proc/bus/usb usbdevfs rw 0 0 # mount /dev/shm # cat /etc/mtab /dev/hda4 / ext2 rw,errors=remount-ro,errors=remount-ro 0 0 proc /proc proc rw 0 0 devpts /dev/pts devpts rw,gid=5,mode=620 0 0 /dev/hda1 /boot ext2 rw 0 0 /dev/hda3 /mnt/win vfat rw 0 0 none /proc/bus/usb usbdevfs rw 0 0 none /dev/shm shm rw 0 0 # mount /dev/shm # cat /etc/mtab /dev/hda4 / ext2 rw,errors=remount-ro,errors=remount-ro 0 0 proc /proc proc rw 0 0 devpts /dev/pts devpts rw,gid=5,mode=620 0 0 /dev/hda1 /boot ext2 rw 0 0 /dev/hda3 /mnt/win vfat rw 0 0 none /proc/bus/usb usbdevfs rw 0 0 none /dev/shm shm rw 0 0 none /dev/shm shm rw 0 0 # umount /dev/shm # cat /etc/mtab /dev/hda4 / ext2 rw,errors=remount-ro,errors=remount-ro 0 0 proc /proc proc rw 0 0 devpts /dev/pts devpts rw,gid=5,mode=620 0 0 /dev/hda1 /boot ext2 rw 0 0 /dev/hda3 /mnt/win vfat rw 0 0 none /proc/bus/usb usbdevfs rw 0 0 Jordan - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/