From: Jordan Mendelson <jordy@napster.com>
To: linux-kernel@vger.kernel.org
Subject: 2.4.0-pre able to mount SHM twice
Date: Wed, 03 Jan 2001 14:38:51 -0800 [thread overview]
Message-ID: <3A53A9FB.A3D558D9@napster.com> (raw)
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
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reply other threads:[~2001-01-03 22:39 UTC|newest]
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