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    SubjectRe: context switch vs. signal delivery [was: Re: Accelerating usermode linux]

    > Also, people who play games with FP actually change the FP data on the
    > stack frame, and depend on signal return to reload it. Admittedly I've
    > only ever seen this on SIGFPE, but anyway - this is all done with integer
    > instructions that just touch bitpatterns on the stack.. The kernel can't
    > catch it sanely.

    Could the fp state be put on its own page and the dirty bit
    evaluated in the decision whether to restore fpu state ?

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