Re: Perf ABI versioning

[Frederic Weisbecker]

On Mon, Jan 24, 2011 at 09:39:03PM +0100, Peter Zijlstra wrote:
> 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.

Yeah we could in fact use it to find if fields have been added,
removed. Right, all in one that looks enough to me.
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