linux-kernel - Re: [PATCH 2/4] zedtrace generic kernel filtering

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Date:	Sat, 28 Feb 2009 10:26:57 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Tom Zanussi <tzanussi@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/4] zedtrace generic kernel filtering


* Tom Zanussi <tzanussi@...il.com> wrote:

> Add generic kernel filtering.
> 
> Signed-off-by: Tom Zanussi <tzanussi@...il.com>
> 
> ---
>  kernel/trace/trace_binary/Makefile     |    2 +-
>  kernel/trace/trace_binary/zed.c        |  103 +++++++++--
>  kernel/trace/trace_binary/zed.h        |   15 ++
>  kernel/trace/trace_binary/zed_filter.c |  301 ++++++++++++++++++++++++++++++++
>  kernel/trace/trace_binary/zed_filter.h |   45 +++++
>  kernel/trace/trace_binary/zed_sched.c  |    4 +
>  6 files changed, 451 insertions(+), 19 deletions(-)
>  create mode 100644 kernel/trace/trace_binary/zed_filter.c
>  create mode 100644 kernel/trace/trace_binary/zed_filter.h

Nice!

This fits really nicely into the ftrace principles and i'd love 
to see this feature merged into ftrace - would you be interested 
in working on that? If so then you can find the latest tracing 
tree at:

    http://people.redhat.com/mingo/tip.git/README

Note that Steve added explicit field enumeration and 'raw' C 
syntax tracepoints to the event tracer earlier today (partly 
based on your ideas here), so that would be a good basis to 
extend/enhance/fix, if you are interested.

Thanks,

	Ingo
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