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    SubjectRe: Float numbers in module programming
    >
    >This used to be a FAQ. The floating-point coprocessor in ix86
    >machines is a shared resource. There is only one. Therefore,
    >the state of the floating-point unit needs to be saved and
    >restored across all context switches. Because this is expensive
    >in terms of CPU time used, it is not saved and restored during
    >system calls. This means that if you use the coprocessor in
    >the kernel, you may screw up somebody's mathematics,

    "somebody" is the current process, is not it? What if used in kthreads?


    Jan Engelhardt
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