Re: [PATCH 2/4] tracing: add event trace infrastructure

[Steven Rostedt]

On Wed, 25 Feb 2009, Theodore Tso wrote:

> On Tue, Feb 24, 2009 at 07:45:48PM -0800, Andrew Morton wrote:
> > echo sched_wakeup > /debug/tracing/set_event
> > echo sched_wakeup > /debug/tracing/clear_event
> > echo 1 > /debug/tracing/clear_all_events
> 
> >From a usability point of view, I'd prefer this as well.  It's only
> two extra files, but it means that filenames in /deb/tracing is
> self-documenting, which is a good thing.  Otherwise, it's really not
> obvious that "echo !event > /debug/tracing/set_event" will disable the
> event, and it's *especially* not obvious "echo > /debug/tracing/set_event"
> will disable all events.
> 
> It's also a tad bit too easy to typo "echo > /debug/tracing/set_event"
> by editing command history, and hitting return a bit too soon after
> clearing out the previous event name but before you manage to type the
> new event name.

OK, then I guess I can add a clear_event file. And to clear all events 
simply do:

 # cat set_event > clear_event

-- Steve

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/