>That's an APIC bug. >When Intel originally released the APIC (some >thirteen years ago) they stated it should be used as a source of the timer >interrupt instead of the 8254. There is no excuse for changing the >behaviour after so many years. So if you are on a broken system, you may >want to work around the bug, but it shouldn't impact good systems.
I'm perfectly happy having Linux optimize itself for the hardware that it is running on. However, the (harsh, I know) reality is that systems with a reliable LAPIC timer in the face of C3 do not exist today, and probably never will. (don't shoot me, it wasn't my design decision, I'm just the messenger:-) Further, I expect that power saving features, such as C3, will become more important and deployed more widely in the future, rather than less widely. So, the 13-year-old design advice will continue to apply to 13-year-old systems, but newer systems with C3 and HPET should be using them. -Len - 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/
