i'm clearly NAK-ing all futex trace hooks until the true impact of the
whole marker facility is better understood. I've tried them for the
scheduler and they were a clear failure: too bloated and too persistent.
but more importantly, as things stand today i've yet to see a _any_
bugreport where these 'tracer' tools that are being referred to were
actually used in the field to fix something. The latency tracers (and
the other tracer variants in -rt) on the other hand have a documented
track record of being useful in fixing bugs and instrumenting the
kernel.
Ingo
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