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

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Message-ID: <20090923105252.GA32176@elte.hu>
Date:	Wed, 23 Sep 2009 12:52:52 +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:

> Hi Ingo,
> 
> Kprobes has been nicely improved lately. The x86 instruction decoder 
> has been fixed to support cross builds and mmx instruction set, 
> besides of a lot of various kprobes core fixes.
> 
> The tracing part has evolved too, we can define human names for 
> arguments and custom subsystem names for dynamic tracepoints.
> 
> And also kprobes profiling and raw dynamic tracepoint samples are now 
> supported through perf. Looks like most of the kernel parts are now in 
> place for a perf support. Things are going to be focused on a perf 
> kprobes tool to exploit that.

Nice progress. What's the expected timeline of exhaustive tools/perf/ 
support?

> Concerning this git tree, based on tip:/tracing/kprobes, I had to 
> merge tracing/core inside few weeks ago because it needed build fixes 
> that were in tracing/core (the merge commit provides the details). The 
> tree is self contained but it's already async with recent upstream 
> tracing updates. It means that merging upstream tree or tracing/core 
> inside may result in non-trivial conflicts. I can handle them, or 
> rebase the whole, as you prefer.
> 
> The tree can be found at:
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing.git
> 	tracing/kprobes

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
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