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SubjectRe: [patch] x86, apic: use 0x20 for the IRQ_MOVE_CLEANUP_VECTOR instead of 0x1f
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?


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