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Date: Wed, 05 Dec 2007 19:20:52 -0700 From: ebiederm@...ssion.com (Eric W. Biederman) To: "Natalie Protasevich" <protasnb@...il.com> Cc: "Len Brown" <lenb@...nel.org>, "Andi Kleen" <ak@...e.de>, "Ingo Molnar" <mingo@...hat.com>, "Thomas Gleixner" <tglx@...utronix.de>, linux-kernel@...r.kernel.org Subject: Re: [PATCH] i386 IOAPIC: de-fang IRQ compression "Natalie Protasevich" <protasnb@...il.com> 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. Eric -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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