Re: [RFC PATCH 1/4] kmemtrace: Core implementation.

From: Frank Ch. Eigler
Date: Tue Jul 22 2008 - 21:28:43 EST

Hi -

On Wed, Jul 23, 2008 at 03:50:02AM +0300, Eduard - Gabriel Munteanu wrote:

> [...] Sounds like a good idea, but I'd like to get rid of markers
> and use Mathieu Desnoyers' tracepoints instead. I'm just waiting for
> tracepoints to get closer to inclusion in mainline/-mm.


> It would be great if tracepoints completely replaced markers, so
> SystemTap would use those instead.

Raw tracepoints are problematic as they require a per-tracepoint C
function signature to be synthesized by the tool (or hard-coded in the
tool or elsewhere). We haven't worked out how best do to this. OTOH,
markers don't require such hard-coding, so are simpler for a general
tool to interface to.

> However, if tracepoints are not ready when kmemtrace is to be merged,
> I'll take your advice and mention markers and SystemTap.

Thanks either way - I'm glad you found an existing tracing mechanism
usable and didn't choose/need to invent your own.

- FChE
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