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    SubjectRe: [thiscpuops upgrade 09/10] x86: this_cpu_cmpxchg and this_cpu_cmpxchg_double operations
    On Wed, 24 Nov 2010, Eric Dumazet wrote:

    > I thought some x86_64 cpus dont have cmpxchg16b ?

    Right I vaguely remember a flag there.

    > You have to check cx16 feature flag or implement a fallback ?

    There is already a compile time fallback. Uhh.. How do I do this at
    runtime?



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