Re: [PATCH v1 03/11] sched: Add sched tracepoints for RV task model

From: Peter Zijlstra
Date: Tue Feb 11 2025 - 09:37:23 EST


On Tue, Feb 11, 2025 at 01:54:44PM +0100, Gabriele Monaco wrote:

> > > +void do_trace_set_current_state(int state_value)
> > > +{
> > > + trace_sched_set_state_tp(current, current->__state, state_value);
> >
> > Should this be:
> >
> > __do_trace_sched_set_state_tp() ?
> >
>
> Mmh, you mean avoiding the static_branch_unlikely in the helper
> function, since it's supposed to be used before calling it?

Yep, seems pointless to repeat that.

> > > +}
> > > +EXPORT_SYMBOL(do_trace_set_current_state);
> >
> > _GPL
> >
>
> I'm absolutely not against this change but, out of curiosity, would
> that imply non-GPL modules are not going to be able to sleep going
> forward? At least not using this pattern.

Bah, you're right. Killing non-GPL modules seems like a worthy goal
though, but perhaps another day ;-)