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authorJack Steiner <steiner@sgi.com>2006-03-02 16:02:21 -0600
committerTony Luck <tony.luck@intel.com>2006-03-24 13:14:03 -0800
commitb354a8388891adc5dc5e5fb0130f000152f3fb94 (patch)
tree17ddef0b367ed0279f8f10d5d9af73ecd01e3db9
parentf90aa8c4febb306e1266e1ad34fd8464e201aa7f (diff)
[IA64] Increase max node count on SN platforms
Add a configuration option to allow the maximum number of nodes to be configurable for GENERIC or SN kernels. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
-rw-r--r--arch/ia64/Kconfig9
-rw-r--r--include/asm-ia64/numnodes.h13
2 files changed, 18 insertions, 4 deletions
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index ff7ae6b664e..10b6b9e7716 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -252,6 +252,15 @@ config NR_CPUS
than 64 will cause the use of a CPU mask array, causing a small
performance hit.
+config IA64_NR_NODES
+ int "Maximum number of NODEs (256-1024)" if (IA64_SGI_SN2 || IA64_GENERIC)
+ range 256 1024
+ depends on IA64_SGI_SN2 || IA64_GENERIC
+ default "256"
+ help
+ This option specifies the maximum number of nodes in your SSI system.
+ If in doubt, use the default.
+
config HOTPLUG_CPU
bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
depends on SMP && EXPERIMENTAL
diff --git a/include/asm-ia64/numnodes.h b/include/asm-ia64/numnodes.h
index 21cff4da548..e9d356f549d 100644
--- a/include/asm-ia64/numnodes.h
+++ b/include/asm-ia64/numnodes.h
@@ -3,13 +3,18 @@
#ifdef CONFIG_IA64_DIG
/* Max 8 Nodes */
-#define NODES_SHIFT 3
+# define NODES_SHIFT 3
#elif defined(CONFIG_IA64_HP_ZX1) || defined(CONFIG_IA64_HP_ZX1_SWIOTLB)
/* Max 32 Nodes */
-#define NODES_SHIFT 5
+# define NODES_SHIFT 5
#elif defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
-/* Max 256 Nodes */
-#define NODES_SHIFT 8
+# if CONFIG_IA64_NR_NODES == 256
+# define NODES_SHIFT 8
+# elif CONFIG_IA64_NR_NODES <= 512
+# define NODES_SHIFT 9
+# elif CONFIG_IA64_NR_NODES <= 1024
+# define NODES_SHIFT 10
+# endif
#endif
#endif /* _ASM_MAX_NUMNODES_H */