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x86: update CONFIG_NUMA description

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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>
This commit is contained in:
KOSAKI Motohiro 2008-11-05 02:27:19 +09:00 committed by Ingo Molnar
parent d4f1b10365
commit fd51b2d7d5
1 changed files with 10 additions and 6 deletions
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16
arch/x86/Kconfig
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@ -951,22 +951,26 @@ config ARCH_PHYS_ADDR_T_64BIT
# Common NUMA Features # Common NUMA Features
config NUMA config NUMA
bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)" bool "Numa Memory Allocation and Scheduler Support"
depends on SMP depends on SMP
depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL) depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL)
default n if X86_PC default n if X86_PC
default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP) default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP)
help help
Enable NUMA (Non Uniform Memory Access) support. Enable NUMA (Non Uniform Memory Access) support.
The kernel will try to allocate memory used by a CPU on the The kernel will try to allocate memory used by a CPU on the
local memory controller of the CPU and add some more local memory controller of the CPU and add some more
NUMA awareness to the kernel. NUMA awareness to the kernel.
For 32-bit this is currently highly experimental and should be only For 64-bit this is recommended if the system is Intel Core 7i
used for kernel development. It might also cause boot failures. (or later), AMD Opteron, or EM64T NUMA.
For 64-bit this is recommended on all multiprocessor Opteron systems.
If the system is EM64T, you should say N unless your system is For 32-bit this is only needed on (rare) 32-bit-only platforms
EM64T NUMA. 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" comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI) depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI)