From: Alan Mayer <ajm@sgi.com>
Date: Wed, 26 Mar 2008 21:11:31 +0000 (-0500)
Subject: x86: resize NR_IRQS for large machines
X-Git-Tag: v2.6.27-rc1~1106^2~248^2~23
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6859a8402945cf1d74af75a2e1aa4e327a506ab4;p=pandora-kernel.git

x86: resize NR_IRQS for large machines

On machines with very large numbers of cpus, tables that are dimensioned
by NR_IRQS get very large, especially the irq_desc table.  They are also
very sparsely used.  When the cpu count is > MAX_IO_APICS, use MAX_IO_APICS
to set NR_IRQS, otherwise use NR_CPUS.

Signed-off-by: Alan Mayer <ajm@sgi.com>
Reviewed-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

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