On Sun, 2006-11-19 at 21:23 +0100, Ingo Molnar wrote: > * Benjamin Herrenschmidt <[EMAIL PROTECTED]> wrote: > > > > dont worry, it's -rt only stuff. > > > > Still, I'm curious :-) Besides, there have been people talking about > > having -rt work on ppc64 so ... > > ok :) > > > What do you need an ack() for on fasteoi ? On all fasteoi controllers > > I have, ack is implicit by obtaining the vector number and all there > > is is an eoi... > > it's a compatibility hack only. Threaded handlers are a different type > of flow, but often the fasteoi handler is not changed to the threaded > handler so i changed it to be a threaded handler too. > > threaded handlers need a mask() + an ack(), because that's the correct > model to map them to kernel threads - threaded handlers can be delayed > for a long time if something higher-prio is preempting them.
Well, the principle of controllers that do fasteoi is that all interrupts of the same priority or below are masked until eoi happens... so I still don't see why you need that... Ben. - 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/
