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[Xen-ia64-devel] [patch] base NR_DYNIRQS on CONFIG_NR_CPUS

from [Jes Sorensen]

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To:	Alex Williamson <alex.williamson@xxxxxx>, xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
Subject:	[Xen-ia64-devel] [patch] base NR_DYNIRQS on CONFIG_NR_CPUS
From:	Jes Sorensen <jes@xxxxxxx>
Date:	Wed, 13 Jun 2007 14:21:51 +0200
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Hi,

This one is needed to boot more than 40 CPUs or we run out of IRQ
sources.

Cheers,
Jes

# HG changeset patch
# User jes@xxxxxxxxxxxxxxxx
# Date 1181737204 -7200
# Node ID c275cb400f8cbf4d4b71f142f6921601c401b882
# Parent  a87acf37aa004a51e6e8dfead05a941ff6ab087c
Determine the size of NR_DYNIRQS based on the size of
CONFIG_NR_CPUS. Hardcoding to 256 means things break when trying to
boot medium to large systems.

Signed-off-by: Jes Sorensen <jes@xxxxxxx>

diff -r a87acf37aa00 -r c275cb400f8c include/asm-ia64/irq.h
--- a/include/asm-ia64/irq.h    Tue Jun 12 22:02:27 2007 -0600
+++ b/include/asm-ia64/irq.h    Wed Jun 13 14:20:04 2007 +0200
@@ -32,7 +32,7 @@
 #define NR_DYNIRQS             256
 
 #define NR_IRQS                        (NR_PIRQS + NR_DYNIRQS)
-#define NR_IRQ_VECTORS         NR_IRQS
+#define NR_DYNIRQS             (CONFIG_NR_CPUS * 8)
 
 #define pirq_to_irq(_x)                ((_x) + PIRQ_BASE)
 #define irq_to_pirq(_x)                ((_x) - PIRQ_BASE)

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