Comment # 16 on bug 90481 from Daniel Scharrer

Unfortunately I am not able get a lockup when using GALLIUM_DDEBUG="pipelined
10000" - it seems the perf impact is still too big on my PC. I also checked
that it still hangs without GALLIUM_DDEBUG.

Kernel: 4.7.0-gentoo
Mesa: git-6fb6201
LLVM: r277571