Re: Queued cleanups

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On Fri, 2010-03-05 at 10:31 +0000, Alan Jenkins wrote:
> On 3/4/10, Ozan Çağlayan <ozan@xxxxxxxxxxxxx> wrote:

> >
> >
> > Shortly I think that m-i-t should track this pulled-in dependency chain and
> > could be able to prune them all upon
> > unloading. According to the manpage of modprobe, -r seems to handle this if
> > the dependencies are not used too. Maybe
> > it's just a missed use-case where the dependencies have refcount >= 0 and
> > not refcount == 0.
> Ah.  After trying this myself, I see how annoying this could be.
> There's not really any better way to do this without kernel
> modifications, sorry.

Right. This is a known problem. And it's something I was thinking about
after sending the other mail. I agree that this could do with fixing. As
you say, a lot of this will get better with softdeps, but there's always
the case that a module load triggers a uevent that loads another module
we will now depend upon, or several other possibilities.

Let's start with softdeps (and look at hinting in kernel modules), then
the next step will be to address the deps we read from the kernel so
that we know who the additional user is in order to unload.


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