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

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Date:	Wed, 23 Sep 2009 23:46:42 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Frederic Weisbecker <fweisbec@...il.com>
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


* Frederic Weisbecker <fweisbec@...il.com> wrote:

> 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

Pulled into tip:tracing/kprobes, thanks Frederic!

> 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).

ok. Right now it's in a cooking branch, tracing/kprobes. I merged it to 
tip:master - we can propagate it to tracing/core once it's ready with 
all known bugs and quirks fixed and with significant perf functionality 
for it.

	Ingo
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