From fd51b2d7d5df932767b89e00d0871a38a2c53e74 Mon Sep 17 00:00:00 2001 From: KOSAKI Motohiro Date: Wed, 5 Nov 2008 02:27:19 +0900 Subject: [PATCH] x86: update CONFIG_NUMA description Impact: clarify/update CONFIG_NUMA text CONFIG_NUMA description talk about a bit old thing. So, following changes are better. o CONFIG_NUMA is no longer EXPERIMENTAL o Opteron is not the only processor of NUMA topology on x86_64 no longer, but also Intel Core7i has it. Signed-off-by: KOSAKI Motohiro Signed-off-by: Ingo Molnar --- arch/x86/Kconfig | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 350bee1..38ae04b 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -951,22 +951,26 @@ config ARCH_PHYS_ADDR_T_64BIT # Common NUMA Features config NUMA - bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)" + bool "Numa Memory Allocation and Scheduler Support" depends on SMP depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL) default n if X86_PC default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP) help Enable NUMA (Non Uniform Memory Access) support. + The kernel will try to allocate memory used by a CPU on the local memory controller of the CPU and add some more NUMA awareness to the kernel. - For 32-bit this is currently highly experimental and should be only - used for kernel development. It might also cause boot failures. - For 64-bit this is recommended on all multiprocessor Opteron systems. - If the system is EM64T, you should say N unless your system is - EM64T NUMA. + For 64-bit this is recommended if the system is Intel Core 7i + (or later), AMD Opteron, or EM64T NUMA. + + For 32-bit this is only needed on (rare) 32-bit-only platforms + that support NUMA topologies, such as NUMAQ / Summit, or if you + boot a 32-bit kernel on a 64-bit NUMA platform. + + Otherwise, you should say N. comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI" depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI) -- 1.8.2.3