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    SubjectRe: [PATCH 1/10] Cr4 is valid on some 486s
    Dave Jones wrote:
    > >
    > > If you have CPU hotplug enabled, you can run SMP code!
    >
    > Sure, but if you boot with 1 CPU, spinlocks get nop'd to emulate UP,
    > and on a 'installed a new cpu' hotplug event, they all come back.
    >

    The point that you don't nop if you have hotplug enabled (which is not
    the norm.)

    -hpa
    -
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