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    SubjectRe: [PATCH] change CONFIG_NUMA description

    * KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> wrote:

    >
    > 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>
    > ---
    > arch/x86/Kconfig | 7 +++----
    > 1 file changed, 3 insertions(+), 4 deletions(-)

    applied to tip/x86/doc, thanks! I've updated a few other details as
    well, see the final commit below.

    Ingo

    ------------->
    From fd51b2d7d5df932767b89e00d0871a38a2c53e74 Mon Sep 17 00:00:00 2001
    From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
    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 <kosaki.motohiro@jp.fujitsu.com>
    Signed-off-by: Ingo Molnar <mingo@elte.hu>
    ---
    arch/x86/Kconfig | 16 ++++++++++------
    1 files 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)

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