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    SubjectRe: [patch 01/23] Fall back on interrupt disable in cmpxchg8b on 80386 and 80486
    On Mon, 20 Aug 2007, Mathieu Desnoyers wrote:

    > Yes, I use it as synchronization mechanism for my buffer management algorithm
    > in LTTng. Since I write in per-cpu buffers and want to be as reentrant
    > as possible wrt other contexts (dealing with NMI as worse case, but also
    > applies to MCE..), I use local_cmpxchg to reserve space in my buffers.
    > It is faster than the standard cmpxchg.

    Ok I have seen these numbers in the OLS papers but I could not reproduce
    them in SLUB.

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