https://bugs.freedesktop.org/show_bug.cgi?id=103100

            Bug ID: 103100
           Summary: Image corruptions, instability and performance
                    regression in drm-next-wip Kernel
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: gr.muench@gmail.com
        QA Contact: dri-devel@lists.freedesktop.org

Im running current drm-next-4.15-wip Kernel and I use AMDGPU with Radeon HD
7970
DC disabled.

The following is wrong:
-Performance in Shadow of Mordor internal benchmark decreases from 68 to 61 fps
-also other games see a small decrease of 1-2 fps
-I see random screen corruptions on my desktop
-after I exit from a game, the system is unstable, screen corruptions are even
more visible and the systems randomly hangs 

I bisected this to:
fd8bf087dffc0bce047c5aea2afcb8f821e48db1 is the first bad commit
commit fd8bf087dffc0bce047c5aea2afcb8f821e48db1
Author: Christian König <christian.koenig@amd.com>
Date:   Tue Aug 29 16:14:32 2017 +0200

    drm/amdgpu: bump version for support of local BOs

    Signed-off-by: Christian König <christian.koenig@amd.com>
    Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

:040000 040000 440c9b026e802e50b6a25ae3b402ea57ef58a891
d31d8e8b93060b11e88f95d4d3bdcf081c77e4e2 M      drivers

This is probably not making any sense, I guess one of the previous commits
related to BOs are faulty. To double checked things I used git checkout between
those commits and make clean during the steps. Its still very unusual but maybe
a dev know whats going on.

log:

amdgpu 0000:01:00.0: GPU fault detected: 146 0x030f3d14
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x0010CD18
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x0F03D014
kernel: amdgpu 0000:01:00.0: VM fault (0x14, vmid 7) at page 1101080, write
from '' (0x00000000) (61)
kernel: amdgpu 0000:01:00.0: GPU fault detected: 146 0x0f073d14
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x0010E178
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x0703D014
kernel: amdgpu 0000:01:00.0: VM fault (0x14, vmid 3) at page 1106296, write
from '' (0x00000000) (61)
kernel: amdgpu 0000:01:00.0: GPU fault detected: 146 0x0e0a3d0c
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x0010E670
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x0A03D00C
kernel: amdgpu 0000:01:00.0: VM fault (0x0c, vmid 5) at page 1107568, read from
'' (0x00000000) (61)
kernel: amdgpu 0000:01:00.0: GPU fault detected: 146 0x0e0a3d0c
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x0010E673
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x0A03D00C
kernel: amdgpu 0000:01:00.0: VM fault (0x0c, vmid 5) at page 1107571, read from
'' (0x00000000) (61)
kernel: amdgpu 0000:01:00.0: GPU fault detected: 146 0x0e0e440c
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00104670
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x0E04400C
kernel: amdgpu 0000:01:00.0: VM fault (0x0c, vmid 7) at page 1066608, read from
'' (0x00000000) (68)
kernel: amdgpu 0000:01:00.0: GPU fault detected: 146 0x0c0f3d14
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00101960
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x0F03D014
kernel: amdgpu 0000:01:00.0: VM fault (0x14, vmid 7) at page 1055072, write
from '' (0x00000000) (61)
kernel: amdgpu 0000:01:00.0: GPU fault detected: 146 0x0e0b3d14
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x001017F0
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x0B03D014
kernel: amdgpu 0000:01:00.0: VM fault (0x14, vmid 5) at page 1054704, write
from '' (0x00000000) (61)
kernel: amdgpu 0000:01:00.0: GPU fault detected: 146 0x02073d14
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00112F90
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x0703D014
kernel: amdgpu 0000:01:00.0: VM fault (0x14, vmid 3) at page 1126288, write
from '' (0x00000000) (61)
kernel: amdgpu 0000:01:00.0: GPU fault detected: 146 0x08073d14
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00110E40
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x0703D014
kernel: amdgpu 0000:01:00.0: VM fault (0x14, vmid 3) at page 1117760, write
from '' (0x00000000) (61)

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