* Ingo Molnar <[EMAIL PROTECTED]> wrote:
> > Great, thanks ... I'm not sure which of the 2 patches fixed things,
> > but I now got the following trace. I've not really analyzed this,
> > but it definitely looks like tun_init() is doing something fishy...
> > ("149776 us maximum-latency"!!)
>
> best would be to enable FUNCTION_TRACING and to do:
>
> echo 1 > /proc/sys/kernel/trace_enabled
> echo 1 > /proc/sys/kernel/mcount_enabled
>
> this will give you an exact trace of what happened, in
> /proc/latency_trace.
btw., if you use -rt, it makes sense to disable the UNWIND options in
the .config - the unwinder causes quite some overhead at places.
Ingo
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