Re: [OKS] Module removal

From: Benjamin Herrenschmidt (benh@kernel.crashing.org)
Date: Tue Jul 02 2002 - 11:50:19 EST


>> It's not really just the module information. If I can, say, get
>> callbacks from something even after I unregister, I may well
>> have destroyed the data I need to process the callbacks, and
>> oops or worse.
>
>Actually, if module exit synchronizes properly, even the
>return-after-removal case shouldn't exist, because we'd simply
>wait for this call to return.
>
>Hmm, interesting. Did I just make the whole problem go away,
>or is travel fatigue playing tricks on my brain ? :-)

That was one of the solutions proposed by Rusty, that is basically
waiting for all CPUs to have scheduled upon exit from module_exit
and before doing the actual removal.

Ben.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Sun Jul 07 2002 - 22:00:09 EST