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    SubjectRe: NMI problems with Dell SMP Xeons

    > Two ways:
    > (1) Boot with a kernel with CONFIG_ACPI=n, so the OS only finds 2 cpus
    > in the MPT instead of the 4 listed by ACPI.
    > (2) The kernel has ACPI=y, but is booted with maxcpus=2.
    > In both cases, send_IPI_allbutself() with IPI 2 or an NMI will result
    > in a hard reset.

    Sounds both like a "Don't do that when it hurts" . I know some people
    have religious issues with ACPI, but it's simple a fact that many
    modern boxes don't work correctly in obvious or subtle ways without it.

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