Re: [RFC PATCH v3 4/4] trace: Trace log handler for logging into STM blocks

[Ingo Molnar]

* Chunyan Zhang <zhang.chunyan@xxxxxxxxxx> wrote:

> >> +++ b/include/trace/perf.h
> >> @@ -175,6 +175,7 @@ trace_event_raw_event_##call(void *__data, proto)                 \
> >>       { assign; }                                                     \
> >>                                                                       \
> >>       trace_event_buffer_commit(&fbuffer);                            \
> >> +     trace_event_stm_log(&fbuffer);                                  \
> >
> > This makes every trace event slower.
> 
> It doesn't actually, you may decide if enable this feature, the trace event will 
> not be slowed if STM_TRACE_EVENT is not selected.

It slows down everyone if a distro enables this feature - that's not acceptable.

Thanks,

	Ingo
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