linux-kernel - Re: Perf ABI versioning

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Message-ID: <1295901543.28776.475.camel@laptop>
Date:	Mon, 24 Jan 2011 21:39:03 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Thomas Renninger <trenn@...e.de>, tardyp@...il.com,
	jean.pihet@...oldbits.com, acme@...stprotocols.net,
	linux-perf-users@...r.kernel.org, mathieu.desnoyers@...icios.com,
	linux-trace-users@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: Perf ABI versioning

On Mon, 2011-01-24 at 21:34 +0100, Frederic Weisbecker wrote:
> 
> But instead of a global tracing ABI number, I would rather suggest
> one number per tracepoint subsystem (sched, power, etc...).
> 
> Ideally it would be per event, but sometimes those events tend to be
> renamed or a whole tracepoint subsystem refactored (see workqueue
> lately). Hence it might be better per subsystem. 

What's wrong with what we have? the /format file is pretty unique to
function as a version number of you use a hash over it.
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