linux-kernel - Re: [PATCH] Tracing: do export trace_set_clr

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Date:	Mon, 08 Nov 2010 09:23:04 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Chris Wilson <chris@...is-wilson.co.uk>,
	Yuanhan Liu <yuanhan.liu@...ux.intel.com>,
	linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH] Tracing: do export trace_set_clr_event

On Mon, 2010-11-08 at 09:14 -0500, Christoph Hellwig wrote:
> On Mon, Nov 08, 2010 at 09:02:14AM -0500, Steven Rostedt wrote:
> > I like the trace=on parameter much better. If that is set we could
> > enable the tracepoints of that module at load time. I really do not want
> > to export the function that was proposed in that patch.
> 
> Yes.  Adding generic support in the module loader to turn on tracepoint
> seems like the much better long term strategy.  Even better if it allows
> turning on individual points instead of all or nothing.

I was thinking the same. How about this:

trace=1  - all tracepoints in the module is enabled
trace=0  - same as leaving it off

trace=name - a specific tracepoint is enabled, using the simple globs
that set_event allows.

trace=name1,name2,name3  - for more than one tracepoint.

-- Steve


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