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Date:	Wed, 05 Dec 2007 19:20:52 -0700
From: (Eric W. Biederman)
To:	"Natalie Protasevich" <>
Cc:	"Len Brown" <>, "Andi Kleen" <>,
	"Ingo Molnar" <>,
	"Thomas Gleixner" <>,
Subject: Re: [PATCH] i386 IOAPIC: de-fang IRQ compression

"Natalie Protasevich" <> writes:

> I think we counted them in the order of 1400 external IRQs (actual
> ioapics/slots plus possible on-card bridges), and yes numbers for used
> IRQs were close to 250. Actual customer configurations could've big
> bigger, I don't have such data.
>> In particular is a large NR_IRQS plus dynamic vector allocation
>> sufficient for all cases you know about?
> Yes, since x86_64 boxes never had a problem once dynamic vectors were
> incorporated.

I was wondering if we could avoid making the vectors per cpu and still be
in good shape on x86_32.  From your description it looks like we can't
quite support everything on x86_32 if we don't do the per cpu vector
thing.  However we will likely have everything interesting supported.

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