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    SubjectRe: 2.6.26-rc2-mm1
    On Wed, 14 May 2008 21:12:13 +0200
    "Torsten Kaiser" <> wrote:

    > On Wed, May 14, 2008 at 10:01 AM, Andrew Morton
    > <> wrote:
    > >
    > >
    > Nice! This one works for me again.


    > But somehow the NUMAness of my system is gone.
    > ...
    > The system is a dual socket Opteron system, each processor has 2 GB of RAM.
    > I will try to debug this more tomorrow, but except the kernel now
    > thinks there is only one NUMA node the system works correct. It is
    > detecting the full 4GB of RAM.
    > This line from 2.6.26-rc2-mm1 really looks like the source of this:
    > [ 0.000000] SRAT: PXMs only cover 0MB of your 4608MB e820 RAM. Not used.
    > There is no more than 4GB of RAM (but part of it is remapped...)

    I suspect that this might be caused by the below.

    That patch no longer seems to be necessary so I'll drop it. Perhaps
    you could try reverting it, please?

    From: Ingo Molnar <>

    x86.git testing found the following build error on latest -git:

    drivers/acpi/numa.c: In function 'acpi_numa_init':
    drivers/acpi/numa.c:226: error: 'NR_NODE_MEMBLKS' undeclared (first use in this function)
    drivers/acpi/numa.c:226: error: (Each undeclared identifier is reported only once
    drivers/acpi/numa.c:226: error: for each function it appears in.)

    with this config:

    i suspect we dont want SRAT parsing when CONFIG_HAVE_ARCH_PARSE_SRAT
    is unset - but the fix looks a bit ugly. Perhaps we should define
    NR_NODE_MEMBLKS even in this case and just let the code fall back
    to some sane behavior?

    Signed-off-by: Ingo Molnar <>
    Signed-off-by: Andrew Morton <>

    drivers/acpi/numa.c | 4 ++++
    1 file changed, 4 insertions(+)

    diff -puN drivers/acpi/numa.c~acpi-acpi_numa_init-build-fix drivers/acpi/numa.c
    --- a/drivers/acpi/numa.c~acpi-acpi_numa_init-build-fix
    +++ a/drivers/acpi/numa.c
    @@ -176,6 +176,7 @@ acpi_parse_processor_affinity(struct acp
    return 0;

    static int __init
    acpi_parse_memory_affinity(struct acpi_subtable_header * header,
    const unsigned long end)
    @@ -193,6 +194,7 @@ acpi_parse_memory_affinity(struct acpi_s

    return 0;

    static int __init acpi_parse_srat(struct acpi_table_header *table)
    @@ -221,9 +223,11 @@ int __init acpi_numa_init(void)
    if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
    acpi_parse_processor_affinity, NR_CPUS);

    /* SLIT: System Locality Information Table */

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      Last update: 2008-05-14 21:39    [W:0.023 / U:7.968 seconds]
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