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Subject: Re: [PATCH v5 11/14] trace: uprobes trace_event interface
From: Steven Rostedt <rostedt@goodmis.org>
Reply-To: rostedt@goodmis.org
To: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@elte.hu>,
       Masami Hiramatsu <mhiramat@redhat.com>, Mel Gorman <mel@csn.ul.ie>,
       Randy Dunlap <rdunlap@xenotime.net>,
       Arnaldo Carvalho de Melo <acme@infradead.org>,
       Roland McGrath <roland@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
       Christoph Hellwig <hch@infradead.org>,
       Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
       Oleg Nesterov <oleg@redhat.com>, Mark Wielaard <mjw@redhat.com>,
       Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
       Andrew Morton <akpm@linux-foundation.org>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Frederic Weisbecker <fweisbec@gmail.com>,
       Jim Keniston <jkenisto@linux.vnet.ibm.com>,
       "Rafael J. Wysocki" <rjw@sisk.pl>, "Frank Ch. Eigler" <fche@redhat.com>,
       LKML <linux-kernel@vger.kernel.org>,
       "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
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On Mon, 2010-06-14 at 14:00 +0530, Srikar Dronamraju wrote:

> +config UPROBE_EVENT
> +	depends on UPROBES
> +	bool "Enable uprobes-based dynamic events"
> +	select TRACING
> +	default y

Why is this default y?

-- Steve

> +	help
> +	  This allows the user to add tracing events on top of userspace dynamic
> +	  events (similar to tracepoints) on the fly via the traceevents interface.
> +	  Those events can be inserted wherever uprobes can probe, and record
> +	  various registers.
> +	  This option is required if you plan to use perf-probe subcommand of perf
> +	  tools on user space applications.
> +
>  endif # FTRACE
>  
>