Re: [PATCH v9 1/1] Tracepoint: register/unregister struct tracepoint

[Mathieu Desnoyers <mathieu.desnoyers@efficios.com>]

----- Original Message -----
> From: "Steven Rostedt" <rostedt@goodmis.org>
> To: "Mathieu Desnoyers" <mathieu.desnoyers@efficios.com>
> Cc: linux-kernel@vger.kernel.org, "Ingo Molnar" <mingo@kernel.org>, "Frederic Weisbecker" <fweisbec@gmail.com>,
> "Andrew Morton" <akpm@linux-foundation.org>, "Frank Ch. Eigler" <fche@redhat.com>, "Johannes Berg"
> <johannes.berg@intel.com>
> Sent: Thursday, April 3, 2014 2:54:41 PM
> Subject: Re: [PATCH v9 1/1] Tracepoint: register/unregister struct tracepoint
> 
> On Thu, 3 Apr 2014 17:49:54 +0000 (UTC)
> Mathieu Desnoyers <mathieu.desnoyers@efficios.com> wrote:
> 
> 
> > So my current thinking is that the pre-existing code was erroneously
> > enabling tracepoints with the name of every event enabled (including
> > e.g. function tracer, kprobes, etc). It was not failing because
> > tracepoint.c silently accepted to enable tracepoints were not loaded
> > yet.
> > 
> 
> If that was true, than wouldn't the error code I added have returned an
> error?

Good point.

I found the culprit:

[    0.560002] event_trace_enable: �GT����� call ffffffff81613930 (core)                                                                                                      
[    0.564001] event_trace_enable: �GTȁ���� call ffffffff816139c0 (core) 

compudj@ok:~/git/rostedt/linux-trace$ objdump -t vmlinux |grep ffffffff81613930
ffffffff81613930 l     O .data	0000000000000090 event_sys_exit
compudj@ok:~/git/rostedt/linux-trace$ objdump -t vmlinux |grep ffffffff816139c0
ffffffff816139c0 l     O .data	0000000000000090 event_sys_enter

I'll look into those two sites tomorrow morning.

Thanks,

Mathieu

> 
> -- Steve
> 

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com