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    SubjectRe: [RFC 00/15] x86_64: Optimize percpu accesses
    Jeremy Fitzhardinge <jeremy@goop.org> writes:

    >> Or we could do something completely evil. And use the other segment
    >> register for the stack canary.
    >>
    >
    > That would still require gcc changes, so it doesn't help much.

    We could use %fs for the per cpu variables. Then we could set %gs to whatever
    we wanted to sync up with gcc

    Eric


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