Re: [PATCH 06/18] sched: Generate trace points only if schedulertracing is enabled

[Steven Rostedt]

On Tue, 2010-03-23 at 02:07 +0100, Frederic Weisbecker wrote:
> On Tue, Mar 23, 2010 at 01:32:08AM +0100, Jan Kara wrote:
> > CC: Ingo Molnar <mingo@xxxxxxx>
> > CC: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> > Signed-off-by: Jan Kara <jack@xxxxxxx>
> > ---
> 
> 
> Note this one is an exception.
> Once tracing is enabled, we need the context switch
> tracer anyway to keep track of the pid:cmdline mappings.
> 
> 

Yes, the scheduling tracepoints are needed by several tracers. This must
be enabled by all.

But then again, I'm thinking it would be nicer to find a way to lower
the impact than just turning them off.

Perhaps only allow the individual disabling if CONFIG_EMBEDDED is set.

-- Steve


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/