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

Mathieu Desnoyers
2010-11-17T18:12:25Z

* Steven Rostedt (rostedt@goodmis.org) wrote:
> 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.

I'd really like to hear Avi's thoughts on this.

Thanks,

Mathieu

--
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.