[Linaro-mm-sig] [PATCH v4 03/18] drm/sched: Add dependency tracking

[Daniel Vetter]

On Wed, Jul 28, 2021 at 1:29 PM Christian König
<ckoenig.leichtzumerken at gmail.com> wrote:
> Am 27.07.21 um 13:09 schrieb Daniel Vetter:
> > Adding a few more people to this bikeshed.
> >
> > On Mon, Jul 12, 2021 at 10:02 PM Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
> >
> >> @@ -349,6 +367,13 @@ int drm_sched_job_init(struct drm_sched_job *job,
> >>                         struct drm_sched_entity *entity,
> >>                         void *owner);
> >>   void drm_sched_job_arm(struct drm_sched_job *job);
> >> +int drm_sched_job_await_fence(struct drm_sched_job *job,
> >> +                             struct dma_fence *fence);
> >> +int drm_sched_job_await_implicit(struct drm_sched_job *job,
> >> +                                struct drm_gem_object *obj,
> >> +                                bool write);
> >> +
> >> +
> > I'm still waiting on the paint delivery for these two functions so I
> > can finish this shed.
>
> Well I wouldn't call that bike shedding, good names are important.
>
> Just imaging we would have called the exclusive-fence write-fence instead.

Sure naming matters, but at least to my English understanding there's
not a semantic different between telling something to await for
something else (i.e. add a dependency) or to tell something to add a
dependency (i.e. await that thing later on before you start doing your
own thing).

Exclusive vs write fence otoh is a pretty big difference in what it means.

But also if there's consensus that I'm wrong then I'm happy to pick
the more preferred of the two options I deem equivalent.

> What speaks against calling them add_dependency() and
> _add_implicit_depencencies() ?

Nothing. I just like another ack on this before I rename it all. Also
I wasnt sure what you'd want to name the implicit dependency thing.

Lucas, Boris, Melissa, any acks here?
-Daniel

> Regards,
> Christian.
>
> >
> > Thanks, Daniel
> >
> >>   void drm_sched_entity_modify_sched(struct drm_sched_entity *entity,
> >>                                      struct drm_gpu_scheduler **sched_list,
> >>                                      unsigned int num_sched_list);
> >> --
> >> 2.32.0
> >>
> >
>


-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch