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

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Date:	Tue, 22 Jun 2010 09:45:29 +0530
From:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:	Steven Rostedt <rostedt@...dmis.org>
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

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

As you see UPROBE_EVENT is gated on UPROBES. I think if UPROBES is
enabled, then UPROBE_EVENT should be enabled. Esp with Christoph
suggesting for module support to be removed, I think it becomes all the
more reason for UPROBE_EVENT to be enabled by default. Otherwise there
is no point in having uprobes code and having no enabled users.
I was even looking at "select UPROBE_EVENT" on enabling UPROBES.

Do you have any specific reason why UPROBE_EVENT should not be enabled
by default? 


--
Thanks and Regards
Srikar
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