> Probing vmalloc faults is _really_ tricky : it also implies that the
quoted text
> handler (let's call it probe) connected to the probe point (marker or
> kprobe) should _never_ cause a vmalloc page fault, 

That is why vmalloc_sync_all() was invented. It might make sense
to just call that on kprobe registration.

But I agree the other problems makes it a bad idea.

I think the better solution is to keep the notifier, but make 
it cheaper (e.g. by using constant patching ...)

-Andi
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