Re: [patch] introduce TRACE_EVENT_ABI (was Re: TRACE_EVENT_ABI ?)

[Steven Rostedt <rostedt@goodmis.org>]

On Wed, 2009-09-23 at 08:43 -0400, Christoph Hellwig wrote:
> I'm not sure we can support any as an ABI yet.  The text format seems to
> volatile in general - not just the output of the individual trace events
> but also the common file format, and for the binary format we need to
> figure a good way to tag the output yet.   Also when we define one as
> one ABI we should make very clear what that means, e.g. does it have to stay
> exactly as is?  Or can we add new fields but not remove old one?

I had this discussion with people in Portland. We seem to agree that
this should just lock the old fields in, but you can add new ones at the
end.

-- Steve