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    Subject[tip:x86/urgent] bootmem, x86: Fix 32bit numa system without RAM on node 0
    Commit-ID:  aa235fc712f379d4194cff9217f07026c452c141
    Gitweb: http://git.kernel.org/tip/aa235fc712f379d4194cff9217f07026c452c141
    Author: Yinghai Lu <yinghai@kernel.org>
    AuthorDate: Wed, 31 Mar 2010 20:45:27 -0700
    Committer: H. Peter Anvin <hpa@zytor.com>
    CommitDate: Thu, 1 Apr 2010 14:41:19 -0700

    bootmem, x86: Fix 32bit numa system without RAM on node 0

    When 32bit numa is used, free_all_bootmem() will still only go over with
    node id 0.

    If node 0 doesn't have RAM installed, the lowest populated node
    becomes low RAM.

    This one fixes BOOTMEM path by iterating over the bdata_list.

    -v3: add more comments, and fix bootmem path too.
    -v4: seperate from one big patch

    Signed-off-by: Yinghai Lu <yinghai@kernel.org>
    LKML-Reference: <4BB416D7.6090203@kernel.org>
    Signed-off-by: H. Peter Anvin <hpa@zytor.com>
    ---
    mm/bootmem.c | 8 +++++++-
    1 files changed, 7 insertions(+), 1 deletions(-)

    diff --git a/mm/bootmem.c b/mm/bootmem.c
    index 2058cb7..ba37d62 100644
    --- a/mm/bootmem.c
    +++ b/mm/bootmem.c
    @@ -312,7 +312,13 @@ unsigned long __init free_all_bootmem(void)
    */
    return free_all_memory_core_early(MAX_NUMNODES);
    #else
    - return free_all_bootmem_core(NODE_DATA(0)->bdata);
    + unsigned long total_pages = 0;
    + bootmem_data_t *bdata;
    +
    + list_for_each_entry(bdata, &bdata_list, list)
    + total_pages += free_all_bootmem_core(bdata);
    +
    + return total_pages;
    #endif
    }


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