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    SubjectRe: [PATCH] seqlock: serialize against writers
    Andi Kleen wrote:
    >> Im running it on a x86_64 box as we speak. How can I tell if there is a
    >> certain mode that is permitting this?
    > If the boot up says you're running with PMtimer then it uses the fallback
    > (usually happens on pre Fam10h AMD boxes). A typical Intel box
    > would use the faster ring 3 only TSC path and then explode with your
    > change I bet.

    Thinking about this some more, perhaps the issue is I am not hitting the
    contended path in vsyscall?


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