The initial Segmentation Fault is undoubtedly due to some
unexpected operation(s) in your own module. Once that
happens during removal, the module is still in the kernel
and in the state "TERMINATING" (or "REMOVING" or something
similar). If it is in this state, it can't be removed
because its already being removed (at least the kernel
thinks so) and you can't remove the rtl_XXX modules because
they still depend on you module.
Baring some heroic measures I won't even begin to describe
because they involve hand-modifying several kernel
structures, the only solutions to this dilemma are:
1. Don't Segmentation Fault the cleanup function
2. Reboot
Norm
----- Original Message -----
From: Tim Beamish <[EMAIL PROTECTED]>
To: rtlinux help <[EMAIL PROTECTED]>
Sent: Tuesday, November 13, 2001 1:47 PM
Subject: [rtl] error in removing a module
> I inserted a self made module called 'tt_mod' into
rtlinux and when I
> tried to remove it, I got a segmentation fault. I did an
lsmod and got
> this:
>
> Module Size Used by
> rtl_fifo 9792 0 (unused)
> tt_mod 0 0 (deleted)
> rtl_sched 27856 0 [tt_mod]
> rtl_posixio 7216 0 [rtl_fifo tt_mod]
> rtl_time 4736 0 [tt_mod rtl_sched
rtl_posixio]
> rtl 18080 0 [rtl_fifo tt_mod
rtl_sched rtl_posixio rtl_time]
> mbuff 6368 2 [tt_mod]
> es1371 28176 0 (autoclean)
> ac97_codec 8768 0 (autoclean) [es1371]
> soundcore 4048 4 (autoclean) [es1371]
> usb-uhci 22416 0 (unused)
> usbcore 29616 0 [usb-uhci]
>
> It looks like the module is still loaded so I tried to
remove it with
> rmmod and got this:
> rmmod: module tt_mod is not loaded
>
> So I tried to insert it again and I got this message:
> insmod: a module named tt_mod already exists
>
> And so I tried to remove it and I got this:
> rmmod: module tt_mod is not loaded
>
> And on and on...
>
> So I tried to stop rtlinux and got this:
> rmmod: mbuff is in use
> rmmod: rtl is in use
> rmmod: rtl_posixio is in use
> rmmod: rtl_sched is in use
> rmmod: rtl_time is in use
>
> Scheme: (-) not loaded, (+) loaded
> (+) mbuff
> (+) rtl
> (-) rtl_fifo
> (+) rtl_posixio
> (+) rtl_sched
> (+) rtl_time
>
> I can't insert tt_mod because it's already there and I
can't remove it
> because it isn't there. Now I can't even stop rtlinux as
everything
> seems to be in use. Is there a way to clean out the
loaded modules in
> rtlinux and force it to quit?
>
> Tim
>
>
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