Cannot unload some modules

Cannot unload some modules

[RaúlNúñez de Arenas Coronado]

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    Hello all :))

    I have a problem with some modules, specially with 'dummy.o' (the
dummy network device driver) and some USB ones: they aren't unloaded,
even when unused and autocleanable, issuing two or more 'rmmod -a'
commands.

    This leaded me to think that the 'cleanup()' functions of those
modules did hang, but the modules are correctly unloaded if called by
their name in rmmod, but no if 'rmmod -a' is used :((

    I've took a look at 'module.c' and I'm clueless. I've checked the
modules and are loaded with 'modprobe -k', are marked as
autocleanable and marked as unused, too.

    BTW, I've noticed too that the serial module sometimes has a
negative value in its 'use' count :!!

    Can anybody tell me what could be happening?. Thanks a lot.

    Raúl

Re: Cannot unload some modules

[Keith Owens]

On Thu, 27 Sep 2001 15:54:19 +0200, 
=?ISO-8859-1?Q?Ra=FAl?= =?ISO-8859-1?Q?N=FA=F1ez?= de Arenas Coronado <dervishd@jazzfree.com> wrote:
>    I have a problem with some modules, specially with 'dummy.o' (the
>dummy network device driver) and some USB ones: they aren't unloaded,
>even when unused and autocleanable, issuing two or more 'rmmod -a'
>commands.

Auto unload ignores modules that have not been used, to avoid a race
condition.  Either use the module or don't auto load them in the first
place.

>    BTW, I've noticed too that the serial module sometimes has a
>negative value in its 'use' count :!!

That could be the serial driver saying that it handles its own unload
count but is more likely to be a bug in the code.  Report it to the
serial driver maintainer.