[PATCH] enable sparsemem without CONFIG_NUMA - Kernel

This is a discussion on [PATCH] enable sparsemem without CONFIG_NUMA - Kernel ; Linus, While testing for more than 8 cpus, I couldn't select sparsemem when CONFIG_X86_GENERICARCH is selected instead of CONFIG_X86_PC. Here's a patch to enable sparsemem independent of NUMA instead of just flatmem ... unless there a reason for sparsemem to ...

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Thread: [PATCH] enable sparsemem without CONFIG_NUMA

  1. [PATCH] enable sparsemem without CONFIG_NUMA


    Linus,

    While testing for more than 8 cpus, I couldn't select sparsemem when
    CONFIG_X86_GENERICARCH is selected instead of CONFIG_X86_PC.

    Here's a patch to enable sparsemem independent of NUMA instead of just
    flatmem ... unless there a reason for sparsemem to depend on NUMA for
    more than 8 CPUs?


    Thanks,
    Jeff


    --- ./arch/x86/Kconfig.org 2008-08-06 18:41:08 +0800
    +++ ./arch/x86/Kconfig 2008-08-06 18:48:13 +0800
    @@ -1035,7 +1035,7 @@

    config ARCH_FLATMEM_ENABLE
    def_bool y
    - depends on X86_32 && ARCH_SELECT_MEMORY_MODEL && X86_PC && !NUMA
    + depends on X86_32 && ARCH_SELECT_MEMORY_MODEL && !NUMA

    config ARCH_DISCONTIGMEM_ENABLE
    def_bool y
    @@ -1051,7 +1051,7 @@

    config ARCH_SPARSEMEM_ENABLE
    def_bool y
    - depends on X86_64 || NUMA || (EXPERIMENTAL && X86_PC)
    + depends on X86_64 || NUMA || (EXPERIMENTAL && X86_PC) || X86_GENERICARCH
    select SPARSEMEM_STATIC if X86_32
    select SPARSEMEM_VMEMMAP_ENABLE if X86_64

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  2. Re: [PATCH] enable sparsemem without CONFIG_NUMA


    * Jeff Chua wrote:

    > Linus,
    >
    > While testing for more than 8 cpus, I couldn't select sparsemem when
    > CONFIG_X86_GENERICARCH is selected instead of CONFIG_X86_PC.
    >
    > Here's a patch to enable sparsemem independent of NUMA instead of just
    > flatmem ... unless there a reason for sparsemem to depend on NUMA for
    > more than 8 CPUs?


    note, i already queued this up in tip/x86/defconfig two days ago, for
    v2.6.28.

    Ingo

    ---------------------->
    From 99809963c99e1ed868d9ebeb4a5e7ee1cbe0309f Mon Sep 17 00:00:00 2001
    From: Jeff Chua
    Date: Wed, 6 Aug 2008 19:09:53 +0800
    Subject: [PATCH] x86: make sparsemem more available

    With CONFIG_X86_PC, I can set CONFIG_SPARSEMEM=y.

    With CONFIG_X86_GENERICARCH, CONFIG_SPARSEMEM depends on CONFIG_NUMA.

    I'm using the patch below to enable sparsemem instead of flatmem.
    System booted and is running.

    Signed-off-by: Ingo Molnar
    ---
    arch/x86/Kconfig | 4 ++--
    1 files changed, 2 insertions(+), 2 deletions(-)

    diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
    index 7917962..e2305c7 100644
    --- a/arch/x86/Kconfig
    +++ b/arch/x86/Kconfig
    @@ -1035,7 +1035,7 @@ config HAVE_ARCH_ALLOC_REMAP

    config ARCH_FLATMEM_ENABLE
    def_bool y
    - depends on X86_32 && ARCH_SELECT_MEMORY_MODEL && X86_PC && !NUMA
    + depends on X86_32 && ARCH_SELECT_MEMORY_MODEL && !NUMA

    config ARCH_DISCONTIGMEM_ENABLE
    def_bool y
    @@ -1051,7 +1051,7 @@ config ARCH_SPARSEMEM_DEFAULT

    config ARCH_SPARSEMEM_ENABLE
    def_bool y
    - depends on X86_64 || NUMA || (EXPERIMENTAL && X86_PC)
    + depends on X86_64 || NUMA || (EXPERIMENTAL && X86_PC) || X86_GENERICARCH
    select SPARSEMEM_STATIC if X86_32
    select SPARSEMEM_VMEMMAP_ENABLE if X86_64

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