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SubjectRe: Latency traces I cannot interpret (sa1100, 2.6.15-rc7-rt1)

there seem to be leaked preempt counts:

<idle>-0 0.n.1 8974us : touch_critical_timing (cpu_idle)

we should never have preemption disabled in cpu_idle(). To debug leaked
preemption counts, enable CONFIG_DEBUG_PREEMPT.

Ingo
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