Messages in this thread | | | Date | Mon, 6 Aug 2007 12:36:09 +0200 | From | Ingo Molnar <> | Subject | Re: [RFC][PATCH] genirq: support multiple interrupt priorities |
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* Paul Mundt <lethal@linux-sh.org> wrote:
> This is a simple patch for adding trivial interrupt priority support. > > I've added a ->set_prio() to the irq_chip which is implemented > effectively the same way as ->set_type(), it's an optional component > for those that really care about it.
i have no fundamental objections but it would be nice to actually prototype this by implementing real priority support in the hardware: both the i8259A and the IO-APIC/local-apic has such IRQ prioritization features.
> + * IRQF_PRIO_HIGH - Give IRQ a high priority > + * IRQF_PRIO_LOW - Give IRQ a low priority
this should be a numeric scale. (Preferably in the 1-99 range (the hardware can then do a lower-resolution thing out of it), so that we can directly map this to IRQ threads and SCHED_FIFO priorities in -rt.)
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