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    SubjectRe: [PATCH] x86: percpu_to_op() misses memory and flags clobbers
    Eric Dumazet wrote:
    > +#define percpu_inc(var) percpu_to_op0("inc", per_cpu__##var)
    > +#define percpu_dec(var) percpu_to_op0("dec", per_cpu__##var)

    There's probably not a lot of value in this. The Intel and AMD
    optimisation guides tend to deprecate inc/dec in favour of using
    add/sub, because the former can cause pipeline stalls due to its partial
    flags update.


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      Last update: 2009-04-01 20:11    [W:0.019 / U:9.524 seconds]
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