Re: [PATCH] Module use count must be updated as bridges arecreated/destroyed

From: Jan Beulich
Date: Thu Sep 27 2007 - 11:04:39 EST

>> >Sounds like a module utilities problem since unloading one module doesn't
>> >normally unload others.
>> I have to disagree here - 'modprobe -r' is specifically unloading all modules the
>> specified one references as long as they have a use count of zero. The
>> difference to other networking modules is that the latter normally don't export
>> symbols, and hence don't have dependent modules (and thus cannot be
>> subject of implicit unloading). Bridge does have dependents, and hence must
>> avoid implicit unloading by managing its use count.
>I want keep the behavior that:
> modprobe -r bridge
>removes all bridges. It is too useful and may already be in some user scripts.

So we have an unsolvable problem here then, unless infrastructure gets added
that allows a module to declare itself as not-implicit-unload-safe, forcing
modprobe -r to keep its hands off it. Ugly.


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