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    SubjectRe: [PATCH 1/4] make dev_to_node return online node
    please use this one instead. this one is less intrusive, and pcibus_to_node will work too
    and don't need other changes.

    YH

    ---

    [PATCH] make dev_to_node return online node v2

    some numa system ( with multi HT chains) may return node without ram. aka it
    is not online.
    try to get one online node, otherwise return -1

    Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>

    diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
    index c163ad1..2c1a651 100644
    --- a/arch/x86/pci/acpi.c
    +++ b/arch/x86/pci/acpi.c
    @@ -213,6 +213,9 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int do
    set_mp_bus_to_node(busnum, node);
    else
    node = get_mp_bus_to_node(busnum);
    +
    + if (node != -1 && !node_online(node))
    + node = -1;
    #endif

    /* Allocate per-root-bus (not per bus) arch-specific data.

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