linux-kernel - Re: [RFC] tracefs

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Message-ID: <20091029080410.GA26970@elte.hu>
Date:	Thu, 29 Oct 2009 09:04:10 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Greg KH <greg@...ah.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [RFC] tracefs


* Greg KH <greg@...ah.com> wrote:

> On Fri, Oct 23, 2009 at 07:32:37AM +0200, Ingo Molnar wrote:
> > 
> > * Greg KH <greg@...ah.com> wrote:
> > 
> > > Hi all,
> > > 
> > > At LinuxCon this year, Steven and I talked about moving the 
> > > debugfs usage in the tracing core to a stand-alone filesystem to 
> > > give the ability to start to lock down the api so that people an 
> > > count on what is going on in the tracing userspace interface.
> > 
> > What we want to move out initially (and i talked to Steve and 
> > Frederic about that a few weeks ago) is the event description bits - 
> > the format stuff in /debug/tracing/events/ - but definitely not all 
> > the other, rather messy and ad-hoc APIs.
> > 
> > _No way_ do we want to tie down the pretty-printing ftrace details 
> > as an ABI. We promised that when ftrace went upstream and all the 
> > details are way too messy to be exposed in an ABI alike matter (and 
> > yes, consider this a NAK Steve ;-).
> 
> Ok, I'll drop this.  There was some cleanups I found, I'll pick those 
> out and send them on.  What tree should I base off of to send cleanup 
> patches to?

The tip of the tracing tree is in tip:tracing/core, you can find it at:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git tracing/core

Thanks,

	Ingo
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