Re: [PATCH 1/5] Revert "kmemtrace: fix printk format warnings"

Eduard - Gabriel Munteanu
2008-08-19T18:36:56Z

On Tue, Aug 19, 2008 at 02:16:53PM -0400, Mathieu Desnoyers wrote:
> Question :
>
> Is this kmemtrace marker meant to be exposed to userspace ?
>
> I suspect not. In all case, not directly. I expect in-kernel probes to
> be connected on these markers which will get the arguments they need,
> and maybe access the inner data structures. Anyhow, tracepoints should
> be used for that, not markers. You can later put markers in the probes
> which are themselves connected to tracepoints.
>
> Tracepoints = in-kernel tracing API.
>
> Markers = Data-formatting tracing API, meant to export the data either
> to user-space in text or binary format.
>
> See
>
> http://git.kernel.org/?p=linux/kernel/git/compudj/linux-2.6-lttng.git;a=shortlog
>
> tracepoint-related patches.

I think we're ready to try tracepoints. Pekka, could you merge Mathieu's
tracepoints or otherwise provide a branch where I could submit a
tracepoint conversion patch for kmemtrace?

> Mathieu