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Subject: Re: PATCH [0/4] perf: clean-up of power events API
From: Peter Zijlstra <peterz@infradead.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Renninger <trenn@suse.de>, Arjan van de Ven <arjan@linux.intel.com>,
        Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
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        Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
        Thomas Gleixner <tglx@linutronix.de>,
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In-Reply-To: <20101019114501.GA25371@elte.hu>
References: <201010062334.46971.trenn@suse.de>
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Date: Tue, 19 Oct 2010 13:47:21 +0200
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On Tue, 2010-10-19 at 13:45 +0200, Ingo Molnar wrote:
> 
> * Thomas Renninger <trenn@suse.de> wrote:
> 
> > > Most definitely. It's no accident that it took such a long time for this issue 
> > > to be raised in the first place. It's a rare occurance -
> >
> > Do you agree that this occurance happened now and these events should get cleaned 
> > up before ARM and other archs make use of the broken interface?
> >
> > If not, discussing this further, is a big waste of time... and Jean would have to 
> > try to adapt his ARM code on the broken ABI...
> 
> The discussion seems to have died down somewhat. Please re-send to lkml the latest 
> patches you have to remind everyone of the latest state of things - the merge window 
> is getting near.
> 
> My only compatibility/ABI point is basically that it shouldnt break _existing_ 
> tracepoints (and users thereof). If your latest bits meet that then it ought to be a 
> good first step. You are free to (and encouraged to) introduce more complete sets of 
> events.

Can we deprecate and eventually remove the old ones, or will we be
forever obliged to carry the old ones too?