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    SubjectRe: Pentium ALIVE patch testing
    In article <>,
    Richard B. Johnson <> wrote:
    >Testing with the included program sometime gives:
    >Nov 13 17:32:16 chaos kernel: Dazed and confused, but trying to continue
    >Nov 13 17:32:16 chaos kernel: Do you have a strange power saving mode enabled?
    >Nov 13 17:32:16 chaos kernel: Uhhuh. NMI received for unknown reason 30.
    > [ .... ]

    This is one of the buglets in the current code - this is what happens
    when you do a "int $0x2" - the code thinks it's a valid (external) NMI.
    Without the fix it would have generated a #GP fault (which linux turns
    into a segmentation fault), because the IDT entry for #2 would have been
    marked as privileged - while the new page fault handler has no
    reasonable way of finding out what's up...

    Perfecting the patch is going to take some time - the current one
    essentially just fixes the lock-up.


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      Last update: 2005-03-22 13:40    [W:0.027 / U:7.460 seconds]
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