linux-kernel - Re: [GIT PULL] tracing/kprobes: Kprobes core/tracing/profiling updates

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Message-ID: <20090923212438.GA5190@nowhere>
Date:	Wed, 23 Sep 2009 23:24:40 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Li Zefan <lizf@...fujitsu.com>
Subject: Re: [GIT PULL] tracing/kprobes: Kprobes core/tracing/profiling
	updates

On Wed, Sep 23, 2009 at 12:52:52PM +0200, Ingo Molnar wrote:
> Would be nice to merge latest -git into this tree and resolve the 
> conflicts:
> 
>  kernel/trace/Makefile
>  kernel/trace/trace.h
>  kernel/trace/trace_event_types.h
>  kernel/trace/trace_export.c
> 
> Then i could pull it into tip:tracing/kprobes for more testing.
> 
> 	Ingo

I've just merged latest upstream tree into it and pushed
that in a new branch:

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing.git
	tracing/kprobes-v2

There were several conflicts, not trivial. I hope I haven't missed
something. But it boots well, I've tested a simple kprobe creation
and fetched its events through perf without any problem.

Thanks,
Frederic.

PS: I'd recommend you to define a name when you define a kprobe.
For example if you want to get the first argument of sys_open,
don't create it using:

	p sys_open a0

but rather:

	p:my_probe_name sys_open a0

Otherwise you will get a default kprobe name that doesn't seem
to make perf trace happy (put in my TODO list).

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