Re: [PATCH 0/6] RFC Support hot device unplug in amdgpu

On Mon, May 11, 2020 at 11:19:30AM +0100, Chris Wilson wrote:

Quoting Daniel Vetter (2020-05-11 10:54:33)

...

• worse, neither vk nor gl (to my knowledge) have a concept of events for when the gpu died. The only stuff you have is things like arb_robustness which says a) everything continues as if nothing happened b) there's a function where you can ask whether your gl context and all the textures/buffers are toast.

Vulkan/DX12 arrived after eGPU, and there is at least the concept of VK_ERROR_DEVICE_LOST. Mainly used at the moment after a GPU hang and loss of context.

https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.htm...

Ah cool, so -EIO on some ioctls, with silencing it in the gl driver and passing it on for the vk driver should be ok. Assuming vk frameworks bother to implement the *may* thing. I'm assuming if the validation midlayer doesn't inject this, it's untested and firework will ensue.

But then more direct path to fireworks is what vk is all about :-) -Daniel