linux-kernel - [PATCH for 2.6.23] i386: Mark NUMA support experimental

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Date:	Tue, 21 Aug 2007 14:42:40 +0200
From:	Andi Kleen <ak@...e.de>
To:	torvalds@...l.org
Cc:	linux-kernel@...r.kernel.org, mel@....ul.ie
Subject: [PATCH for 2.6.23] i386: Mark NUMA support experimental

I did some testing and found quite a lot of problems (doesn't
boot at all on non NUMA and misassigns cores on Opteron systems).

Mark it as experimental and warn against its use for now.

It's still default y for SUMMIT/NUMAQ because it'll presumably
work on these systems.

Signed-off-by: Andi Kleen <ak@...e.de>

---
 arch/i386/Kconfig |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

Index: linux/arch/i386/Kconfig
===================================================================
--- linux.orig/arch/i386/Kconfig
+++ linux/arch/i386/Kconfig
@@ -614,10 +614,14 @@ config X86_PAE
 
 # Common NUMA Features
 config NUMA
-	bool "Numa Memory Allocation and Scheduler Support"
-	depends on SMP && HIGHMEM64G && (X86_NUMAQ || (X86_SUMMIT || X86_GENERICARCH) && ACPI)
+	bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)"
+	depends on SMP && HIGHMEM64G && (X86_NUMAQ || (X86_SUMMIT || X86_GENERICARCH) && ACPI) && EXPERIMENTAL
 	default n if X86_PC
 	default y if (X86_NUMAQ || X86_SUMMIT)
+	help
+	  NUMA support for i386. This is currently high experimental
+	  and should be only used for kernel development. It might also
+	  cause boot failures.
 
 comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
 	depends on X86_SUMMIT && (!HIGHMEM64G || !ACPI)
-
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