[Xenomai-help] Re: Proper module_cleanup procedure

[Randy Smith <rsmith@domain.hid>]

Anyone?...Is this mike on?

Randy Smith wrote:
> Hello,
>
> I am running the 2.4 kernel with Xenomai-2.1.0 native skin and I have 
> a kernel module that creates 2 shared memory heaps and then creates a 
> a periodic realtime task to do some interesting things.  This periodic 
> realtime task communicates with a linux user mode task through the 
> shared memory that gains access to it through 
> rt_heap_bind/rt_heap_alloc calls.  Things go along swimmingly.
>
> I now want to be able to do an "rmmod" on the module and in its 
> cleanup routine, right now I just have rt_heap_delete calls for the 
> two shared memory heaps.  This completes successfully, but if I then 
> try to install another version (debug for instance) of the module with 
> "insmod", I get a memory error.
> Is this is due to the fact that I didn't suspend the periodic realtime 
> task and then delete it before deleting the heaps?  Is this 
> necessary?  Are there any use counts or other signs that I could check 
> to ensure that everyone was finished with the heaps so that I can 
> delete them?
>
> Is there any consequence to the user mode task due to jerking the rug 
> out from under it?
>
> Thanks,
>
> Randy Smith
> Software Engineer
> ImageMap, Inc.
>