linux-kernel - Re: [PATCH 3/2] perf_counters: add debugfs dir option

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Message-ID: <20090709144552.GA3102@redhat.com>
Date:	Thu, 9 Jul 2009 10:45:52 -0400
From:	Jason Baron <jbaron@...hat.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>, mingo@...e.hu,
	linux-kernel@...r.kernel.org, paulus@...ba.org, rostedt@...dmis.org
Subject: Re: [PATCH 3/2] perf_counters: add debugfs dir option

On Thu, Jul 09, 2009 at 02:47:17AM +0200, Frederic Weisbecker wrote:
> On Wed, Jul 08, 2009 at 04:17:43PM -0400, Jason Baron wrote:
> > On Tue, Jul 07, 2009 at 10:29:20AM +0200, Peter Zijlstra wrote:
> > > On Mon, 2009-07-06 at 17:12 -0400, Jason Baron wrote:
> > > > Add support to 'perf list' and 'perf stat' for kernel tracepoints. The
> > > > implementation creates a 'for_each_subsystem' and 'for_each_event' for
> > > > easy iteration over the tracepoints. The debugfs filesystem must be mounted
> > > > at '/sys/kernel/debug'. We can add an optional search path in the future.
> > > 
> > > I don't have a single machine that has that mount point.
> > > 
> > > 
> > 
> > ok, The patch below adds support for a 'PERF_DIR_DEBUGFS' environment
> > variable. It also adds a command line for '--debugfs-dir' and
> > '--debugfs-dir='. By default 'perf' continues to look in
> > /sys/kernel/debug, which I believe is most common.
> > 
> > thanks,
> > 
> > -Jason
> > 
> > Signed-off-by: Jason Baron <jbaron@...hat.com>
> 
> 
> 
> Or why not parsing /etc/mtab ?
> 
> Thanks.
> 
> 
> 

good idea. I'll add that.

thanks,

-Jason
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