On Tue, 21 Aug 2007, Mathieu Desnoyers wrote: > - Changed smp_rmb() for barrier(). We are not interested in read order > across cpus, what we want is to be ordered wrt local interrupts only. > barrier() is much cheaper than a rmb().
But this means a preempt disable is required. RT users do not want that. Without preemption the processor can be moved after c has been determined. That is why the smp_rmb() is there. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
