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    Subject[PATCH] x86: set node_remap_size[0] in fallback path
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    otherwise alloc_remap will not get node_mem_map from kva area, and
    alloc_node_mem_map has to alloc_bootmem_node get mem_map.
    it will use two copies low address...

    Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>

    --- a/arch/x86/mm/discontig_32.c 2008-05-31 21:46:14.000000000 -0700
    +++ b/arch/x86/mm/discontig_32.c 2008-05-31 21:49:02.000000000 -0700
    @@ -124,6 +124,7 @@ int __init get_memcfg_numa_flat(void)
    node_start_pfn[0] = 0;
    node_end_pfn[0] = max_pfn;
    memory_present(0, 0, max_pfn);
    + node_remap_size[0] = node_memmap_size_bytes(0, 0, max_pfn);

    /* Indicate there is one node available. */
    nodes_clear(node_online_map);

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