(In reply to Kajzer from comment #8)
> I suspect you need one when hang happens,

No, as I said I'm mostly interested in the initialization messages.

> I'm trying really hard to make it hang with the patch from Alex but it seems
> that patch did the trick, there are no more hangs.

That's expected. Alex's patch isn't a fix but just to confirm the problem is
really directly related to write-combined CPU mappings.