Intermittent errors when using amdgpu_job_submit_direct

[Chunming Zhou]

I've raised it up when Christian make page fault, at that patch, 
amdgpu_job_submit_direct uses exclusive page fault ring for that.

But if you use amdgpu_job_submit_direct for gerneral rings ocuppied by 
scheduler, I guess varias bugs will happen.

-David

在 2019/7/9 12:53, Kuehling, Felix 写道:
> I'm seeing some weird intermittent bugs (vm faults, hangs, etc) when
> trying to use amdgpu_job_submit_direct. I'm wondering if there is a
> possibility of a race condition, when a submit_direct and a GPU
> scheduler thread try to submit to the same ring at the same time. I
> didn't see any locking to allow multiple threads safely submitting to
> the same ring.
>
> Am I missing something?
>
> Thanks,
>     Felix
>