Messages in this thread |  | | | Date | Sun, 19 Nov 2006 21:23:48 +0100 | | From | Ingo Molnar <> | | Subject | Re: [PATCH] 2.6.18-rt7: PowerPC: fix breakage in threaded fasteoi type IRQ handlers |
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* Benjamin Herrenschmidt <benh@kernel.crashing.org> 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.
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