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    Subject[patch 1/3] x86_64: Node local PDA -- early cpu_to_node
    The following patchset is to allocate node local memory for the x86_64 
    processor PDA.

    Andrew, can you pls include this in -mm for testing?

    Thanks,
    Kiran

    ---

    Patch enables early initialization of cpu_to_node. apicid_to_node is built by
    reading the SRAT table, from acpi_numa_init, and x86_cpu_to_apicid is built
    by parsing the ACPI MADT table, from acpi_boot_init. Combine these two tables
    and setup cpu_to_node. Thanks to Andi for suggesting this.

    Early initialization helps the static per-cpu areas in getting pages from
    correct node, and sets up cpu_to_node early for node local PDA allocations.

    Signed-off-by: Alok N Kataria <alokk@calsoftinc.com>
    Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>

    Index: linux-2.6.15-rc3/arch/x86_64/kernel/setup.c
    ===================================================================
    --- linux-2.6.15-rc3.orig/arch/x86_64/kernel/setup.c 2005-11-30 11:32:53.000000000 -0800
    +++ linux-2.6.15-rc3/arch/x86_64/kernel/setup.c 2005-11-30 16:49:19.000000000 -0800
    @@ -528,6 +528,7 @@
    void __init setup_arch(char **cmdline_p)
    {
    unsigned long kernel_end;
    + unsigned i;

    ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
    drive_info = DRIVE_INFO;
    @@ -669,6 +670,15 @@
    acpi_boot_init();
    #endif

    +#ifdef CONFIG_ACPI_NUMA
    + /*
    + * Setup cpu_to_node using the SRAT lapcis & ACPI MADT table
    + * info.
    + */
    + for (i = 0; i < NR_CPUS; i++)
    + cpu_to_node[i] = apicid_to_node[x86_cpu_to_apicid[i]];
    +#endif
    +
    #ifdef CONFIG_X86_LOCAL_APIC
    /*
    * get boot-time SMP configuration:
    @@ -687,12 +697,9 @@

    request_resource(&iomem_resource, &video_ram_resource);

    - {
    - unsigned i;
    /* request I/O space for devices used on all i[345]86 PCs */
    for (i = 0; i < STANDARD_IO_RESOURCES; i++)
    request_resource(&ioport_resource, &standard_io_resources[i]);
    - }

    e820_setup_gap();

    -
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