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    SubjectRe: 2.6.22-rc1-mm1: strange GPF when panicing under kvm
    Jeremy Fitzhardinge wrote:
    > When I boot 2.6.22-rc1-mm1 under kvm, but forget to specify a root
    > filesystem, it panics as expected. However, when panicing, it gets a
    > GPF in delay_tsc, and then starts recursively panicing.
    >
    > I don't really understand what's going on; the instruction it's faulting
    > on seems to be "pause" (ie, rep;nop), which seems like it shouldn't
    > fault at all. It looks like some kvm artifact to me, but I'm not sure.
    >
    > Hm, given the error code, maybe it's a segment register problem.
    >
    >

    Strange. What does your msr 0x482 look like? If you have
    /dev/cpu/0/msr, the following will spit it out:

    -------------
    #!/usr/bin/python

    import struct

    msrs = file('/dev/cpu/0/msr')
    msrs.seek(0x482)
    msr = msrs.read(8)
    msr = struct.unpack('Q', msr)[0]

    print '%x' % (msr,)
    ----------------

    (that msr can force trapping of the pause instruction, even though
    there's no good reason to do it, and kvm wouldn't inject a gp if it did
    anyway).

    --
    error compiling committee.c: too many arguments to function

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