Re: [RFC][PATCH 1/5] [PATCH 1/5] events: Add EVENT_FS the event filesystem

Steven Rostedt
2010-11-17T17:52:39Z

On Wed, 2010-11-17 at 12:46 -0500, Mathieu Desnoyers wrote:
> * Steven Rostedt (rostedt@goodmis.org) wrote:
> [...]
> > Are these events now going to be labeled as stable? Is every tracepoint
> > we have, much have the same data? Linus specifically said at Kernel
> > Summit that he wants absolutely NO modules to have a stable tracepoint.
>
> I'd like to bring up the point of KVM tracepoints here. KVM can be configured as
> a module, and may clearly contain tracepoints that we'd like to be stable.
>
> My thought is that what we really want to enforce is "no stable tracepoints in
> drivers" rather than in "modules", but I might be wrong.
>
> Thoughts ?

I still say no to stable tracepoints in modules. Once you open that
door, everyone will have it.

But, that doesn't mean that a raw traepoint can't be stable. If the
maintainer of that tracepoint states it is stable, then by all means,
let tools use it.

-- Steve