Do modern CPUs flush branch predictor state on context switch? https://lkml.org/lkml/2018/1/4/635 … seems to indicate that they don’t. If not, why are we treating process separation as “the thing that fixes Spectre”?
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*cough* *cough* Firefox Fission
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To be clear, I think we *should* do Fission, but we should be honest with ourselves about what the benefits are relative to the work…
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I think cynicism on a far broader scale is called for here.
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Ben Titzer spoke about Spectre at Brown today and said about as much. (But don't quote me, I may well be misrepresenting him.)
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