Re: 2.6.17-mm6

[Andrew Morton]

On Wed, 5 Jul 2006 22:59:05 -0700
Andrew Morton <akpm@xxxxxxxx> wrote:

> On Wed, 05 Jul 2006 23:42:00 -0600
> ebiederm@xxxxxxxxxxxx (Eric W. Biederman) wrote:
> 
> > So I suspect that we need to de-percpuify kernel_stat.irqs.
> 
> I think so.

Maybe not.  If we do this, we lose the pretty CPUn columns in
/proc/interrupts.  That /proc/interrupts display requires that we maintain
NR_CPUS*NR_IRQS counters.

Given that a large NR_IRQs space will be sparsely populated, we should
dynamically allocate the NR_CPUS storage for each active IRQ, as you say.

That involves putting it into the irq_desc (as good a place as any).  And a
rather large number of trivial edits.  I guess we do this only for genirq?
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