2.5: Can't unmount fs after using NFS

Felipe Alfaro Solana (felipe_alfaro@linuxmail.org)
30 Mar 2003 17:03:07 +0200


Hi,

Since I started testing 2.5 on my NFS server, I'm having problems
unmounting filesystems that were exported by NFS (of course, before
trying to unmount, I stopped NFS):

glass:~# cat /etc/mtab
/dev/hda2 / ext3 rw,noatime 0 0
none /proc proc rw 0 0
usbdevfs /proc/bus/usb usbdevfs rw 0 0
/dev/hda3 /data ext3 rw,noatime 0 0
none /dev/pts devpts rw,gid=5,mode=620 0 0
none /dev/shm tmpfs rw 0 0
/dev/hdb2 /media ext3 rw,noatime 0 0

glass:~# cat /etc/exports
/data 192.168.0.100(rw,no_root_squash) 192.168.0.0/24(ro)
/media 192.168.0.100(rw,no_root_squash)

glass:~# /etc/init.d/nfs stop

glass:~# umount /media
umount: /media: device is busy

glass:~# umount /data
umount: /data: device is busy

glass:~# dmesg|tail
hdb: drive_cmd: status=0x51 { DriveReady SeekComplete Error }
hdb: drive_cmd: error=0x04 { DriveStatusError }
kjournald starting. Commit interval 5 seconds
EXT3-fs warning: maximal mount count reached, running e2fsck is
recommended
EXT3 FS 2.4-0.9.16, 02 Dec 2001 on ide0(3,66), internal journal
EXT3-fs: mounted filesystem with ordered data mode.
nfsd: last server has exited
nfsd: unexporting all filesystems
nfsd: last server has exited
nfsd: unexporting all filesystems

glass:~# umount -f /media
umount2: Device or resource busy
umount: /media: device is busy

glass:~# fuser -vu /media

USER PID ACCESS COMMAND
/media root kernel mount /media

glass:~# fuser -vu /data

USER PID ACCESS COMMAND
/data root kernel mount /data

glass:~# cat /etc/fstab
/dev/hda3 /data ext3
defaults,noatime 1 2
/dev/hda2 / ext3
defaults,noatime 1 1
/dev/hda1 /boot ext3
defaults,noauto 0 0
/dev/hdb2 /media ext3
defaults,noauto,noatime 0 0
none /dev/pts devpts
gid=5,mode=620 0 0
none /proc proc
defaults 0 0
none /dev/shm tmpfs
defaults 0 0
#/dev/hdb1 swap swap
defaults 0 0
/dev/cdrw /mnt/cdrw udf,iso9660
noauto,owner,ro 0 0
/dev/hdc /cdrom auto
ro,noauto,user,exec 0 0
/dev/scd0 /cdrecorder auto
ro,noauto,user,exec 0 0

Is this a bug? This didn't happen with 2.4.

Thanks!

________________________________________________________________________
Felipe Alfaro Solana
Linux Registered User #287198
http://counter.li.org

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