On Wed, Feb 12, 2014 at 04:14:38PM +0000, Arjan van de Ven wrote: > > >> sched_cpu_cache_wiped(int llc) > >> > >> that would be very nice for this; the menuidle side knows this > >> for some cases and thus can just call it. This would be a very > >> small and minimal change > > > > What do you mean by "menuidle side knows this for some cases" ? > > You mean you know that some C-state entries imply llc clean/invalidate ? > > in the architectural idle code we can know if the llc got flushed > there's also the per core flags where we know with reasonable certainty > that the per core caches got flushed.
Ok, but that's arch specific, not something we can detect from the menu governor in generic code , that's what I wanted to ask because it was not clear. Thanks, Lorenzo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/