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| author | KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> | 2008-11-05 02:27:19 +0900 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-06 09:50:38 +0100 |
| commit | fd51b2d7d5df932767b89e00d0871a38a2c53e74 (patch) | |
| tree | 18e5671aee42f9cbab30bc51e33a7876a3e07532 /arch/x86/Kconfig | |
| parent | d4f1b10365d4f03dd802433e0014cf503e6e930c (diff) | |
| download | blackbird-op-linux-fd51b2d7d5df932767b89e00d0871a38a2c53e74.tar.gz blackbird-op-linux-fd51b2d7d5df932767b89e00d0871a38a2c53e74.zip | |
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 <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/Kconfig')
| -rw-r--r-- | arch/x86/Kconfig | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 350bee1d54dc..38ae04bf6514 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) |
