Please stop top posting ! On Thu, 20 May 2010, Sujit K M wrote: > >>> Well, obviously it's unsafe if you remove safety checks. And if you > >>> care to look at the changelog of kernel/printk.c you'll find out why. > >> > >> Hmm... did a quick look and could not find anything related there. > >> Could you please give a pointer? Gah, yes. The changelog of the commit is not really helpful. Let me explain: The console drivers might take locks, which are converted to "sleeping locks" in preempt-rt. As a result we cannot call into those drivers from atomic contexts. And that's what the checks in the printk code prevent. Hope that helps. Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
