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SubjectRe: [PATCH v2 14/20] mm: Provide speculative fault infrastructure
> That makes me extremely nervous... there could be all sort of
> assumptions esp. in arch code about the fact that we never populate the
> tree without the mm sem.
> We'd have to audit archs closely. Things like the page walk cache
> flushing on power etc...

Yes the whole thing is quite risky. Probably will need some
kind of per architecture opt-in scheme?


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