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Subject: Re: 'config EVENT_PROFILE' - how does it ever work?
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Valdis.Kletnieks@vt.edu
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org
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Date: Tue, 07 Jul 2009 16:34:55 +0200
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On Tue, 2009-07-07 at 09:33 -0400, Valdis.Kletnieks@vt.edu wrote:
> Peter - where do you prefer your e-mail?  MAINTAINERS for 'perf' gives this
> chello.nl address, but peterz@infradead.org for other stuff? Sending to both
> just in case...

either work, they end up in the same inbox ;-)

> Found this while trying to figure out why there was a one-entry menu
> for performance counters.
> 
> Commit e077df4f adds to init/Kconfig this code:
> 
> config EVENT_PROFILE
>         bool "Tracepoint profile sources"
>         depends on PERF_COUNTERS && EVENT_TRACER
>         default y
> 
> But there's no other usage of EVENT_TRACER I can find other than a lot
> of 'EVENT_TRACER is not set' entries in defconfigs.  Is this an actual bug,
> or did I lose the plot someplace?

It used to work at some point in the past, but then I think it bitrotted
a bit with the tracer changes. I think Jason Baron posted a few patches
yesterday that fixed it all up and made it work nicely again.

http://lkml.org/lkml/2009/7/6/313