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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:

    > already present in cmpxchg_386_u32 tells much about how this cmpxchg
    > implementation should not be used in a SMP context. However, the cmpxchg_local
    > can perfectly use this fallback, since it only needs to be atomic wrt the local
    > cpu.

    Do you have an example where the use of cmpxchg_local is a performance
    benefit when actually used in code? cmpxchg is already problematic
    functionality since it is not available on all platforms.
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