[PATCH] x86: add MAXSMP

[Ingo Molnar]

restore MAXSMP, it's a nice debugging helper to trigger various crashes
and problems with maximum sized x86 systems.

Make it depend on EXPERIMENTAL and DEBUG_KERNEL, and inform the user
about the effects (stacksize, overhead, memory usage) of this flag.

Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
 arch/x86/Kconfig |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index ed97f2b..91212c1 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -580,10 +580,15 @@ config IOMMU_HELPER
 
 config MAXSMP
 	bool "Configure Maximum number of SMP Processors and NUMA Nodes"
-	depends on X86_64 && SMP && BROKEN
-	default n
+	depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL
 	help
-	  Configure maximum number of CPUS and NUMA Nodes for this architecture.
+	  Configure maximum number of CPUS and NUMA Nodes for this
+	  architecture (up to 4096!).
+
+	  This can increase memory usage, bigger stack footprint and can
+	  add some runtime overhead as well so unless you want a generic
+	  distro kernel you likely want to say N.
+
 	  If unsure, say N.
 
 config NR_CPUS
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/