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    SubjectRe: [ltt-dev] Re: [PATCH] LTT for 2.5.38 1/9: Core infrastructure

    On Sun, 22 Sep 2002, bob wrote:

    > [...] On a technical note: a cache-line ping-ponging is bad - a global
    > spinlock is horrendous. They're different - the lock-less MP scheme gets
    > rid of them both.

    (on the contrary - a global spinlock is bad for exactly that reason,
    because it causes a cacheline ping-pong. So if two CPUs are trying to
    write trace events at once, you'll get the same effect as if they were
    using a global spinlock.)

    Ingo

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