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SubjectRe: loop.o device busy after umount
On Wed, 24 Jul 2002, Kareem Dana wrote:

> Hello,
>
> I've noticed in kernel 2.4.18 that my loop module remains busy after
> I umount the device using it. For example
>
> mount -t iso9660 -o loop file.iso /mnt
> * loop module gets loaded
> * lsmod shows "loop 7952 1 (autoclean)"
> * ps ax shows [loop0] process
>

On Linux-2.4.18 there is no such problem here.


Script started on Wed Jul 24 15:13:59 2002
# lsmod
Module Size Used by
st 29272 0 (autoclean) (unused)
nfs 46836 0 (autoclean)
lockd 36988 0 (autoclean) [nfs]
sunrpc 62812 0 (autoclean) [nfs lockd]
ipchains 33624 6
ipx 18724 0 (unused)
3c59x 27968 1 (autoclean)
nls_cp437 4472 4 (autoclean)
isofs 17200 0 (unused)
loop 8472 0
sr_mod 11932 0 (unused)
cdrom 27808 0 [sr_mod]
BusLogic 35768 7
sd_mod 10104 14
scsi_mod 51740 4 [st sr_mod BusLogic sd_mod]
# mount -o loop raw.bin /mnt
# lsmod
Module Size Used by
st 29272 0 (autoclean) (unused)
nfs 46836 0 (autoclean)
lockd 36988 0 (autoclean) [nfs]
sunrpc 62812 0 (autoclean) [nfs lockd]
ipchains 33624 6
ipx 18724 0 (unused)
3c59x 27968 1 (autoclean)
nls_cp437 4472 4 (autoclean)
isofs 17200 0 (unused)
loop 8472 3
sr_mod 11932 0 (unused)
cdrom 27808 0 [sr_mod]
BusLogic 35768 7
sd_mod 10104 14
scsi_mod 51740 4 [st sr_mod BusLogic sd_mod]
# ls /mnt
boot.b initrd-2.4.18 map message vmlinuz-2.4.18
# umount /mnt
# lsmod
Module Size Used by
st 29272 0 (autoclean) (unused)
nfs 46836 0 (autoclean)
lockd 36988 0 (autoclean) [nfs]
sunrpc 62812 0 (autoclean) [nfs lockd]
ipchains 33624 6
ipx 18724 0 (unused)
3c59x 27968 1 (autoclean)
nls_cp437 4472 4 (autoclean)
isofs 17200 0 (unused)
loop 8472 0
sr_mod 11932 0 (unused)
cdrom 27808 0 [sr_mod]
BusLogic 35768 7
sd_mod 10104 14
scsi_mod 51740 4 [st sr_mod BusLogic sd_mod]
# rmmod loop
# lsmod
Module Size Used by
st 29272 0 (autoclean) (unused)
nfs 46836 0 (autoclean)
lockd 36988 0 (autoclean) [nfs]
sunrpc 62812 0 (autoclean) [nfs lockd]
ipchains 33624 6
ipx 18724 0 (unused)
3c59x 27968 1 (autoclean)
nls_cp437 4472 4 (autoclean)
isofs 17200 0 (unused)
sr_mod 11932 0 (unused)
cdrom 27808 0 [sr_mod]
BusLogic 35768 7
sd_mod 10104 14
scsi_mod 51740 4 [st sr_mod BusLogic sd_mod]
# mount -o loop raw.bin /mnt
# lsmod
Module Size Used by
loop 8568 3 (autoclean)
st 29272 0 (autoclean) (unused)
nfs 46836 0 (autoclean)
lockd 36988 0 (autoclean) [nfs]
sunrpc 62812 0 (autoclean) [nfs lockd]
ipchains 33624 6
ipx 18724 0 (unused)
3c59x 27968 1 (autoclean)
nls_cp437 4472 4 (autoclean)
isofs 17200 0 (unused)
sr_mod 11932 0 (unused)
cdrom 27808 0 [sr_mod]
BusLogic 35768 7
sd_mod 10104 14
scsi_mod 51740 4 [st sr_mod BusLogic sd_mod]
# umount /mnt
# lsmod
Module Size Used by
loop 8568 0 (autoclean)
st 29272 0 (autoclean) (unused)
nfs 46836 0 (autoclean)
lockd 36988 0 (autoclean) [nfs]
sunrpc 62812 0 (autoclean) [nfs lockd]
ipchains 33624 6
ipx 18724 0 (unused)
3c59x 27968 1 (autoclean)
nls_cp437 4472 4 (autoclean)
isofs 17200 0 (unused)
sr_mod 11932 0 (unused)
cdrom 27808 0 [sr_mod]
BusLogic 35768 7
sd_mod 10104 14
scsi_mod 51740 4 [st sr_mod BusLogic sd_mod]
# rmmod loop
# exit
Script done on Wed Jul 24 15:15:49 2002


Cheers,
Dick Johnson
Penguin : Linux version 2.4.18 on an i686 machine (797.90 BogoMips).
The US military has given us many words, FUBAR, SNAFU, now ENRON.
Yes, top management were graduates of West Point and Annapolis.

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