> could you just try v2.6.21 plus the -rt patch, which has the tracer 
quoted text
> built-in? That's a combination that should work well. You can pick it up 
> from:
> 
>    http://people.redhat.com/mingo/realtime-preempt/
> 
> same config options as above. If you dont turn on PREEMPT_RT you'll get 
> an almost-vanilla kernel.

2.6.22-rc2, only EVENT_TRACE - boots, can't rerpoduce
2.6.21-vanila - can reproduce
2.6.21-rt7, trace options off - can reproduce
2.6.21-rt7, trace options on - can't reproduce

Possibly something timing related, that's altered by the trace code.
I tried the trace kernel without starting the trace app, but still no
bug.

Any other ideas?

Thanks,
Miklos
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