AMDGPU Patches Revived For Better Hot Device Unplug / External GPU Handling

[phoronix]

Phoronix: AMDGPU Patches Revived For Better Hot Device Unplug / External GPU Handling

More than one month ago we reported on AMDGPU patches proposed for better hot unplug handling, mainly for the use-case of external GPU solutions if disconnecting them while the system is still running to avoid a range of show-stopping problems. It's been a quiet few weeks but that work has now seen a new revision...

http://www.phoronix.com/scan.php?page=news_item&px=AMDGPU-Hot-Unplug-V2

[GreenByte]

This should also help a lot with single gpu pci passthrough switching. I coded a patch that basically removes all failures out from device de-initialization and it works to remove the gpu once it's in amdgpu with kms, although after a couple of times things just go haywire (as expected).