> I wouldn't say it is totally impossible. There are ways in which Linux can > work > without a reliable Local APIC timer. One option being - make one CPU that > gets > the external timer interrupt multicast an IPI to all the other CPUs that > wants to get periodic timer interrupt.
That doesn't mix very well with variable ticks. And I believe we really need them. For no tick in idle you need a timer for each CPU that can be programmed to a reasonably long interval to wake you up after longer idleness. And all that should work without bouncing cache lines around all the time because that doesn't work on larger systems. -Andi - 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/
