On Wed, Jan 06, 2010 at 04:42:30PM -0600, Anthony Liguori wrote: > On 01/06/2010 02:37 PM, Gleb Natapov wrote: > >We have exactly that hook in apic already and that's how RTC determines > >that interrupt was coalesced. > > AFAICT, apic_irq_delivered is only reset explicitly by the RTC when > the line is lowered. It's not currently lowered based on EOI. > Correct. We can expose ACK notifiers to userspace (and if we want to move assigned devices into userspace we have to), but I'd rather avoid it. > How can this mechanism be used with the HPET when operating in edge > triggered mode? > If interrupt is coalesced increment counter and double HPET timer frequency. When counter is zeroed return HPET timer to normal frequency. -- Gleb. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
