linux-kernel - Re: [PATCH] sparse_irq aka dyn

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Message-ID: <491CC469.20508@sgi.com>
Date:	Thu, 13 Nov 2008 16:20:57 -0800
From:	Mike Travis <travis@....com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>, mingo@...e.hu,
	tglx@...utronix.de, hpa@...or.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sparse_irq aka dyn_irq v13

Yinghai Lu wrote:
> Mike Travis wrote:
>> Andrew Morton wrote:
>>> On Thu, 13 Nov 2008 14:41:36 -0800
>>> Yinghai Lu <yinghai@...nel.org> wrote:
>>>
>> That's a good question.  If there are 4k or 16k cpus, would the number of
>> irq's being "kstat'd" need to be > 64k?  (I'm not exactly sure why there
>> are NR_CPUS * NR_IRQS_LEGACY kstat entries per IRQ?)
> 
> can be replaced with nr_cpu_ids * NR_IRQS_LEGACY...
> 
> YH

Ok, but why does each irq need a list of all other irq's in the system?
Can they be collapsed into one array or percpu list?

Thanks,
Mike 
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