https://bugs.freedesktop.org/show_bug.cgi?id=104919

            Bug ID: 104919
           Summary: R9285 4.17-wip locks/vmfaults since drm/amdgpu: revert
                    "drm/amdgpu: use AMDGPU_GEM_CREATE_VRAM_CLEARED for VM
                    PD/PTs" v2
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: adf.li...@gmail.com

last couple of agd5f 4.17-wips have locked with unreal tournament alpha for me
on R9 285.

Seems to be

first bad commit: [d712b817ceb9311cffad47867da26311c06a812b] drm/amdgpu: revert
"drm/amdgpu: use AMDGPU_GEM_CREATE_VRAM_CLEARED for VM PD/PTs" v2

Though it takes a while to lock, and sometimes only after restarting the game,
so slight chance of a false good.

This game requests slightly more than the 2 gig vram I have - maybe relevant if
others have more and can't reproduce.

Attached examples of logging retrieved after a lock. Usually sysrq will do,
once needed hard reset, first chunk got before a lock by quickly quitting the
game after seeing some new artifacts.

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