linux-kernel - [RFC patch 0/3] Tracepoints

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Message-Id: <20080703160526.637679319@polymtl.ca>
Date:	Thu, 03 Jul 2008 12:05:26 -0400
From:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
To:	akpm@...ux-foundation.org, Ingo Molnar <mingo@...e.hu>,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Masami Hiramatsu <mhiramat@...hat.com>
Subject: [RFC patch 0/3] Tracepoints

Hi,

Here is the new tracepoint infrastructure, heavily inspired from the Markers. It
applies on 2.6.26-rc8. I also post my fs/ LTTng instrumentation as an example
of the resulting code using tracepoints. Please feel free to comment.

- Tracepoints allow more complete type checking (at compile-time) than markers.
- They allow to connect probes involving in-kernel tracers which must be aware
  of complex types such as "struct task_struct *" (not just a void *).
- They are not meant as a replacement for markers, since they do not allow
  one-liner printk-style addition of tracing statements for debugging purpose.
- They require a declaration in a header file, which creates a nice stable API.

Thanks,

Mathieu

-- 
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68
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