Bug #742
open
umount problems with multiple mounts
Added by corecode over 17 years ago.
Updated over 2 years ago.
Description
hey,
yes, my fault, but:
%mount
/dev/ad6s1a on / (ufs, local, soft-updates)
/dev/ad6s1b on /pbulk (ufs, local, soft-updates)
/ on /pbulk/clients/labospc67_1/root (null, local, read-only)
/pbulk/clients/labospc67_1/var on /pbulk/clients/labospc67_1/root/var (null, local)
/pbulk/clients/labospc67_1/tmp on /pbulk/clients/labospc67_1/root/tmp (null, local)
/pbulk/clients/labospc67_1/dev on /pbulk/clients/labospc67_1/root/dev (null, local)
/ on /pbulk/clients/labospc67_1/root (null, local, read-only)
%umount labospc67_1/root
umount: unmount of /pbulk/clients/labospc67_1/root failed: Device busy
%umount /pbulk/clients/labospc67_1/root/var
umount: unmount of /pbulk/clients/labospc67_1/root/var failed: Invalid argument
something is wrong here. i guess I can't umount the "upper" root mount, because it takes the "lower" root mount first. dito for the subdirs.
cheers
simon
- Description updated (diff)
- Category set to Userland
- Status changed from New to Feedback
- Assignee deleted (
0)
- Priority changed from High to Normal
- Target version set to 3.8
Hi,
I've tried to reproduced it with a similar mount setup but all went fine:
- df -h
Filesystem Size Used Avail Capacity Mounted on
/dev/vkd0s1a 2.0G 1.1G 757M 59% /
devfs 1.0K 1.0K 0B 100% /dev
procfs 4.0K 4.0K 0B 100% /proc
/ 2.0G 1.1G 757M 59% /mnt
/var 2.0G 1.1G 757M 59% /mnt/var
/usr 2.0G 1.1G 757M 59% /mnt/usr
- mount
/dev/vkd0s1a on / (ufs, local)
devfs on /dev (devfs, local)
procfs on /proc (procfs, local)
/ on /mnt (null, local)
/var on /mnt/var (null)
/usr on /mnt/usr (null)
- umount /mnt
unmount(/mnt): Cannot unmount: 3 mount refs still present
umount: unmount of /mnt failed: Device busy
- umount /mnt/var
- umount /mnt/usr
- umount /mnt
- df -h
Filesystem Size Used Avail Capacity Mounted on
/dev/vkd0s1a 2.0G 1.1G 757M 59% /
devfs 1.0K 1.0K 0B 100% /dev
procfs 4.0K 4.0K 0B 100% /proc
Cheers,
Antonio Huete
- Status changed from Feedback to In Progress
- Assignee set to tuxillo
Hi,
corecode pointed out I was missing an additional mount_null / /mnt in my test. After doing that I can reproduce the issue:
- df -h
Filesystem Size Used Avail Capacity Mounted on
/dev/vkd0s1a 2.0G 1.3G 558M 70% /
devfs 1.0K 1.0K 0B 100% /dev
procfs 4.0K 4.0K 0B 100% /proc
/ 2.0G 1.3G 558M 70% /mnt
/var 2.0G 1.3G 558M 70% /mnt/var
/usr 2.0G 1.3G 558M 70% /mnt/usr
/ 2.0G 1.3G 558M 70% /mnt
- umount /mnt
unmount(0x8033214280): Cannot unmount: 2 mount refs still present
umount: unmount of /mnt failed: Device busy
- umount /mnt/var/
umount: unmount of /mnt/var failed: Invalid argument
Assigining this to myself.
Cheers,
Antonio Huete
- Target version changed from 3.8 to 6.0
- Description updated (diff)
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