linux-kernel - Re: [PATCH v5 11/14] trace: uprobes trace

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Message-ID: <1277130156.9181.11.camel@gandalf.stny.rr.com>
Date:	Mon, 21 Jun 2010 10:22:36 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Cc:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Mel Gorman <mel@....ul.ie>,
	Randy Dunlap <rdunlap@...otime.net>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Roland McGrath <roland@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Christoph Hellwig <hch@...radead.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Mark Wielaard <mjw@...hat.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: Re: [PATCH v5 11/14] trace: uprobes trace_event interface

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
>  
>  

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