Messages in this thread |  | | Date | Mon, 11 Jan 2010 15:07:23 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [patch] x86, apic: use 0x20 for the IRQ_MOVE_CLEANUP_VECTOR instead of 0x1f |
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On 01/11/2010 03:00 PM, Eric W. Biederman wrote: >> >> In irqinit.c, we statically pre-assign the per-cpu vector to irq >> mappings (vector_irq) for all the legacy IRQ vectors. Similarly irq_cfg >> is statically initialized for legacy IRQ's in io_apic.c. So we won't be >> able to use this space for anything else. > > Last I looked when we switched legacy irqs irqs from pic mode to io_apic mode > we continue to use the same vector. > > Which means we should not be wasting those vectors and that it is dangerous > to play lowest priority irq games in that range. >
This statement made no sense to me?
-hpa
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