Re: [PATCH] x86: fix probe_nr_irqs for xen

[Yinghai Lu]

On Thu, Aug 21, 2008 at 5:02 PM, Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
> Yinghai Lu wrote:
>> like system vectors with smp-ipi etc?
>>
>
> More or less.  Xen currently uses 6 per-cpu event channels, and it maps
> each to its own irq.  My plan is to allocate just 6 irqs, map 6 vectors
> to them, and bind each event channel to a vector/cpu pair.  If nothing
> else, it will make /proc/interrupts somewhat sane again.
>
>
>>> Also, implementing probe_nr_irqs() in a more generic (rather than
>>> io_apic-specific) way.  Using some interface that queries each irq chip
>>> for how many irqs it supports, or something.
>>>
>>
>> hope we can kill nr_irqs/NR_IRQS
>>
>
> When irqs are truely dynamically allocated?
>
need more test with sparse_irq

YH
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