Re: [PATCH v2 12/26] x86, irq: Add realloc_irq_and_cfg_at()

[Yinghai Lu]

On Fri, Mar 8, 2013 at 11:53 AM, Konrad Rzeszutek Wilk
<konrad.wilk@xxxxxxxxxx> wrote:
>> + * irq_realloc_desc - allocate irq descriptor for irq that is already reserved
>
> Which begs the question - why was it not allocated when it was reserved?

The reasons for not allocating them during reserving:
1. only several pins in ioapic are used, allocate for them pin, will
   waste memory for not used one.
2. relocate later could make sure irq_desc is allocated on local node ram.

Thanks

Yinghai
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