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SubjectRe: [patch] Real-Time Preemption, -VP-2.6.9-rc4-mm1-U0
    Karim> cmpxchg (basically: try reserve; if fail retry; else
Karim> write), with per-cpu buffers.

Not sure if I really understand the context where Ingo would use this,
but this lockless scheme doesn't seem to be safe for realtime; the
retry can potentially happen an arbitrary number of times.

- Roland
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