
Nicolai Hähnle's post basically covers the lengthy process of how he recently debugged and fixed a tricky GPU VM fault in the RadeonSI Gallium3D driver. The issue was triggered by an Unreal Engine 4 demo and bisected down to an unrelated LLVM commit, but Hähnle was able to jump through the hoops, figure the issue, and get it corrected.
If you are curious about the lengthy process for debugging GPU VM faults, you can read his blog post.
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