https://bugzilla.kernel.org/show_bug.cgi?id=78221

            Bug ID: 78221
           Summary: 3.16 RC1: AMD R9 270 GPU locks up on some heavy 2D
                    activity - GPU VM fault occurs. (possibly DMA copying
                    issue strikes back?)
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.16-rc1
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: t3st3r at mail.ru
        Regression: No

Configuration:
 AMD R9 270 with 3.16-rc1 kernel.
 Ubuntu 14.04 + oibaf PPA used as recent opensource graphics stack (MESA 10.3
git).
 XFCE used as DE, compositing is off.

To reproduce:
 Intermittent bug. R9 270 GPU can sometimes lock up on some heavy 2D-based
loads. 
 Known way to toggle bug is to install Battle for Wesnoth game from ubuntu
repos and allow game to display some map with many units/heavy animations when
running in windowed mode (BfW is SDL-based, 2D-only game, it does not makes GL
calls, etc). In random intervals, usually in range of 30 minutes, GPU could
lose stability and could lock up.

Special considerations:
 1) GPU recovery often succeeds in this case. Yet its bad to have 20 seconds of
black screen and sometimes it can fail to recover after multiple GPU crashes.
 2) Kernels prior 3.15 had similar issue. Kernel 3.15 (release version but not
-RCs) has been rock solid and never crashed GPU to the best of my knowledge, no
matter what I attempted. Now 3.16-rc1 crashes again.
 3) Taking 2) into account and such verioning I suspect it could have something
to do with commit b5be1a839a33634393394e4782edaa37a4bc1a1e or somewhere around.
Possibly its what reintroduced lockups in 3.16 again. Maybe underlying reasons
of deadlocks were not fixed for R9 270?
 4) GPU seems to be stable under 3D loads I've attempted - it does not crashes
even after hours of quite demanding 3D loads like games, etc. Only some
specific 2D loads can cause such issues.

Crash details are looking like this:
===CUT===
Jun 18 03:10:01 localhost kernel: [26125.102351] radeon 0000:01:00.0: ring 0
stalled for more than 10263msec
Jun 18 03:10:01 localhost kernel: [26125.102362] radeon 0000:01:00.0: GPU
lockup (waiting for 0x0000000000445274 last fence id 0x0000000000445273 on ring
0)
Jun 18 03:10:01 localhost kernel: [26125.102370] radeon 0000:01:00.0: failed to
get a new IB (-35)
Jun 18 03:10:01 localhost kernel: [26125.671219] AMD-Vi: Event logged
[IO_PAGE_FAULT device=01:00.0 domain=0x0018 address=0x00000000803dae00
flags=0x0000]
Jun 18 03:10:01 localhost kernel: [26125.671232] AMD-Vi: Event logged [
Jun 18 03:10:01 localhost kernel: [26125.671232] radeon 0000:01:00.0: Saved
23200 dwords of commands on ring 0.
Jun 18 03:10:01 localhost kernel: [26125.671240] IO_PAGE_FAULT device=01:00.0
domain=0x0018 address=0x00000000803dae30 flags=0x0020]
Jun 18 03:10:01 localhost kernel: [26125.671243] AMD-Vi: Event logged
[IO_PAGE_FAULT device=01:00.0 domain=0x0018 address=0x0000000080000100
flags=0x0020]
Jun 18 03:10:01 localhost kernel: [26125.671248] AMD-Vi: Event logged
[IO_PAGE_FAULT device=01:00.0 domain=0x0018 address=0x00000000803dad00
flags=0x0000]
Jun 18 03:10:01 localhost kernel: [26125.671361] radeon 0000:01:00.0: GPU
softreset: 0x0000006C
Jun 18 03:10:01 localhost kernel: [26125.671365] radeon 0000:01:00.0:  
GRBM_STATUS               = 0xA0003028
Jun 18 03:10:01 localhost kernel: [26125.671367] radeon 0000:01:00.0:  
GRBM_STATUS_SE0           = 0x00000006
Jun 18 03:10:01 localhost kernel: [26125.671370] radeon 0000:01:00.0:  
GRBM_STATUS_SE1           = 0x00000006
Jun 18 03:10:01 localhost kernel: [26125.671372] radeon 0000:01:00.0:  
SRBM_STATUS               = 0x200000C0
Jun 18 03:10:01 localhost kernel: [26125.671483] radeon 0000:01:00.0:  
SRBM_STATUS2              = 0x00000000
Jun 18 03:10:01 localhost kernel: [26125.671485] radeon 0000:01:00.0:  
R_008674_CP_STALLED_STAT1 = 0x00000000
Jun 18 03:10:01 localhost kernel: [26125.671487] radeon 0000:01:00.0:  
R_008678_CP_STALLED_STAT2 = 0x00010000
Jun 18 03:10:01 localhost kernel: [26125.671489] radeon 0000:01:00.0:  
R_00867C_CP_BUSY_STAT     = 0x00000002
Jun 18 03:10:01 localhost kernel: [26125.671492] radeon 0000:01:00.0:  
R_008680_CP_STAT          = 0x80010243
Jun 18 03:10:01 localhost kernel: [26125.671494] radeon 0000:01:00.0:  
R_00D034_DMA_STATUS_REG   = 0x44483146
Jun 18 03:10:01 localhost kernel: [26125.671496] radeon 0000:01:00.0:  
R_00D834_DMA_STATUS_REG   = 0x44C84246
Jun 18 03:10:01 localhost kernel: [26125.671499] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00000000
Jun 18 03:10:01 localhost kernel: [26125.671501] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x00000000
Jun 18 03:10:02 localhost kernel: [26126.218193] radeon 0000:01:00.0:
GRBM_SOFT_RESET=0x0000DDFF
Jun 18 03:10:02 localhost kernel: [26126.218247] radeon 0000:01:00.0:
SRBM_SOFT_RESET=0x00100140
Jun 18 03:10:02 localhost kernel: [26126.219404] radeon 0000:01:00.0:  
GRBM_STATUS               = 0x00003028
Jun 18 03:10:02 localhost kernel: [26126.219407] radeon 0000:01:00.0:  
GRBM_STATUS_SE0           = 0x00000006
Jun 18 03:10:02 localhost kernel: [26126.219409] radeon 0000:01:00.0:  
GRBM_STATUS_SE1           = 0x00000006
Jun 18 03:10:02 localhost kernel: [26126.219411] radeon 0000:01:00.0:  
SRBM_STATUS               = 0x200000C0
Jun 18 03:10:02 localhost kernel: [26126.219522] radeon 0000:01:00.0:  
SRBM_STATUS2              = 0x00000000
Jun 18 03:10:02 localhost kernel: [26126.219524] radeon 0000:01:00.0:  
R_008674_CP_STALLED_STAT1 = 0x00000000
Jun 18 03:10:02 localhost kernel: [26126.219526] radeon 0000:01:00.0:  
R_008678_CP_STALLED_STAT2 = 0x00000000
Jun 18 03:10:02 localhost kernel: [26126.219528] radeon 0000:01:00.0:  
R_00867C_CP_BUSY_STAT     = 0x00000000
Jun 18 03:10:02 localhost kernel: [26126.219530] radeon 0000:01:00.0:  
R_008680_CP_STAT          = 0x00000000
Jun 18 03:10:02 localhost kernel: [26126.219533] radeon 0000:01:00.0:  
R_00D034_DMA_STATUS_REG   = 0x44C83D57
Jun 18 03:10:02 localhost kernel: [26126.219535] radeon 0000:01:00.0:  
R_00D834_DMA_STATUS_REG   = 0x44C83D57
Jun 18 03:10:02 localhost kernel: [26126.219780] radeon 0000:01:00.0: GPU reset
succeeded, trying to resume
Jun 18 03:10:02 localhost kernel: [26126.246602] [drm] probing gen 2 caps for
device 1002:5a16 = 31cd02/0
Jun 18 03:10:02 localhost kernel: [26126.246606] [drm] PCIE gen 2 link speeds
already enabled
Jun 18 03:10:02 localhost kernel: [26126.250269] [drm] PCIE GART of 1024M
enabled (table at 0x0000000000276000).
Jun 18 03:10:02 localhost kernel: [26126.250405] radeon 0000:01:00.0: WB
enabled
Jun 18 03:10:02 localhost kernel: [26126.250408] radeon 0000:01:00.0: fence
driver on ring 0 use gpu addr 0x0000000080000c00 and cpu addr
0xffff88041651fc00
Jun 18 03:10:02 localhost kernel: [26126.250411] radeon 0000:01:00.0: fence
driver on ring 1 use gpu addr 0x0000000080000c04 and cpu addr
0xffff88041651fc04
Jun 18 03:10:02 localhost kernel: [26126.250413] radeon 0000:01:00.0: fence
driver on ring 2 use gpu addr 0x0000000080000c08 and cpu addr
0xffff88041651fc08
Jun 18 03:10:02 localhost kernel: [26126.250415] radeon 0000:01:00.0: fence
driver on ring 3 use gpu addr 0x0000000080000c0c and cpu addr
0xffff88041651fc0c
Jun 18 03:10:02 localhost kernel: [26126.250417] radeon 0000:01:00.0: fence
driver on ring 4 use gpu addr 0x0000000080000c10 and cpu addr
0xffff88041651fc10
Jun 18 03:10:02 localhost kernel: [26126.251393] radeon 0000:01:00.0: fence
driver on ring 5 use gpu addr 0x0000000000075a18 and cpu addr
0xffffc90011db5a18
Jun 18 03:10:02 localhost kernel: [26126.436426] [drm] ring test on 0 succeeded
in 3 usecs
Jun 18 03:10:02 localhost kernel: [26126.436432] [drm] ring test on 1 succeeded
in 1 usecs
Jun 18 03:10:02 localhost kernel: [26126.436437] [drm] ring test on 2 succeeded
in 1 usecs
Jun 18 03:10:02 localhost kernel: [26126.436500] [drm] ring test on 3 succeeded
in 2 usecs
Jun 18 03:10:02 localhost kernel: [26126.436510] [drm] ring test on 4 succeeded
in 1 usecs
Jun 18 03:10:02 localhost kernel: [26126.613588] [drm] ring test on 5 succeeded
in 2 usecs
Jun 18 03:10:02 localhost kernel: [26126.613595] [drm] UVD initialized
successfully.
Jun 18 03:10:04 localhost kernel: [26128.294193] SysRq : Emergency Sync
Jun 18 03:10:04 localhost kernel: [26128.309427] Emergency Sync complete
Jun 18 03:10:12 localhost kernel: [26136.610250] radeon 0000:01:00.0: ring 0
stalled for more than 10001msec
Jun 18 03:10:12 localhost kernel: [26136.610260] radeon 0000:01:00.0: GPU
lockup (waiting for 0x0000000000445396 last fence id 0x0000000000445273 on ring
0)
Jun 18 03:10:12 localhost kernel: [26136.610266] [drm:r600_ib_test] *ERROR*
radeon: fence wait failed (-35).
Jun 18 03:10:12 localhost kernel: [26136.610273] [drm:radeon_ib_ring_tests]
*ERROR* radeon: failed testing IB on GFX ring (-35).
Jun 18 03:10:12 localhost kernel: [26136.610278] radeon 0000:01:00.0: ib ring
test failed (-35).
Jun 18 03:10:13 localhost kernel: [26137.083011] SysRq : Emergency Sync
Jun 18 03:10:13 localhost kernel: [26137.098644] Emergency Sync complete
Jun 18 03:10:13 localhost kernel: [26137.164779] radeon 0000:01:00.0: GPU
softreset: 0x00000048
Jun 18 03:10:13 localhost kernel: [26137.164782] radeon 0000:01:00.0:  
GRBM_STATUS               = 0xA0003028
Jun 18 03:10:13 localhost kernel: [26137.164785] radeon 0000:01:00.0:  
GRBM_STATUS_SE0           = 0x00000006
Jun 18 03:10:13 localhost kernel: [26137.164787] radeon 0000:01:00.0:  
GRBM_STATUS_SE1           = 0x00000006
Jun 18 03:10:13 localhost kernel: [26137.164789] radeon 0000:01:00.0:  
SRBM_STATUS               = 0x200000C0
Jun 18 03:10:13 localhost kernel: [26137.164911] radeon 0000:01:00.0:  
SRBM_STATUS2              = 0x00000000
Jun 18 03:10:13 localhost kernel: [26137.164913] radeon 0000:01:00.0:  
R_008674_CP_STALLED_STAT1 = 0x00000000
Jun 18 03:10:13 localhost kernel: [26137.164918] radeon 0000:01:00.0:  
R_008678_CP_STALLED_STAT2 = 0x00010000
Jun 18 03:10:13 localhost kernel: [26137.164925] radeon 0000:01:00.0:  
R_00867C_CP_BUSY_STAT     = 0x00000002
Jun 18 03:10:13 localhost kernel: [26137.164930] radeon 0000:01:00.0:  
R_008680_CP_STAT          = 0x80010243
Jun 18 03:10:13 localhost kernel: [26137.164933] radeon 0000:01:00.0:  
R_00D034_DMA_STATUS_REG   = 0x44C83D57
Jun 18 03:10:13 localhost kernel: [26137.164935] radeon 0000:01:00.0:  
R_00D834_DMA_STATUS_REG   = 0x44C83D57
Jun 18 03:10:13 localhost kernel: [26137.164937] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00000000
Jun 18 03:10:13 localhost kernel: [26137.164940] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x00000000
Jun 18 03:10:13 localhost kernel: [26137.709342] radeon 0000:01:00.0:
GRBM_SOFT_RESET=0x0000DDFF
Jun 18 03:10:13 localhost kernel: [26137.709397] radeon 0000:01:00.0:
SRBM_SOFT_RESET=0x00000100
Jun 18 03:10:13 localhost kernel: [26137.710554] radeon 0000:01:00.0:  
GRBM_STATUS               = 0x00003028
Jun 18 03:10:13 localhost kernel: [26137.710556] radeon 0000:01:00.0:  
GRBM_STATUS_SE0           = 0x00000006
Jun 18 03:10:13 localhost kernel: [26137.710558] radeon 0000:01:00.0:  
GRBM_STATUS_SE1           = 0x00000006
Jun 18 03:10:13 localhost kernel: [26137.710560] radeon 0000:01:00.0:  
SRBM_STATUS               = 0x200000C0
Jun 18 03:10:13 localhost kernel: [26137.710681] radeon 0000:01:00.0:  
SRBM_STATUS2              = 0x00000000
Jun 18 03:10:13 localhost kernel: [26137.710683] radeon 0000:01:00.0:  
R_008674_CP_STALLED_STAT1 = 0x00000000
Jun 18 03:10:13 localhost kernel: [26137.710685] radeon 0000:01:00.0:  
R_008678_CP_STALLED_STAT2 = 0x00000000
Jun 18 03:10:13 localhost kernel: [26137.710687] radeon 0000:01:00.0:  
R_00867C_CP_BUSY_STAT     = 0x00000000
Jun 18 03:10:13 localhost kernel: [26137.710689] radeon 0000:01:00.0:  
R_008680_CP_STAT          = 0x00000000
Jun 18 03:10:13 localhost kernel: [26137.710695] radeon 0000:01:00.0:  
R_00D034_DMA_STATUS_REG   = 0x44C83D57
Jun 18 03:10:13 localhost kernel: [26137.710706] radeon 0000:01:00.0:  
R_00D834_DMA_STATUS_REG   = 0x44C83D57
Jun 18 03:10:13 localhost kernel: [26137.710960] radeon 0000:01:00.0: GPU reset
succeeded, trying to resume
Jun 18 03:10:13 localhost kernel: [26137.724290] [drm] probing gen 2 caps for
device 1002:5a16 = 31cd02/0
Jun 18 03:10:13 localhost kernel: [26137.724294] [drm] PCIE gen 2 link speeds
already enabled
Jun 18 03:10:13 localhost kernel: [26137.728012] [drm] PCIE GART of 1024M
enabled (table at 0x0000000000276000).
Jun 18 03:10:13 localhost kernel: [26137.728147] radeon 0000:01:00.0: WB
enabled
Jun 18 03:10:13 localhost kernel: [26137.728150] radeon 0000:01:00.0: fence
driver on ring 0 use gpu addr 0x0000000080000c00 and cpu addr
0xffff88041651fc00
Jun 18 03:10:13 localhost kernel: [26137.728152] radeon 0000:01:00.0: fence
driver on ring 1 use gpu addr 0x0000000080000c04 and cpu addr
0xffff88041651fc04
Jun 18 03:10:13 localhost kernel: [26137.728154] radeon 0000:01:00.0: fence
driver on ring 2 use gpu addr 0x0000000080000c08 and cpu addr
0xffff88041651fc08
Jun 18 03:10:13 localhost kernel: [26137.728156] radeon 0000:01:00.0: fence
driver on ring 3 use gpu addr 0x0000000080000c0c and cpu addr
0xffff88041651fc0c
Jun 18 03:10:13 localhost kernel: [26137.728158] radeon 0000:01:00.0: fence
driver on ring 4 use gpu addr 0x0000000080000c10 and cpu addr
0xffff88041651fc10
Jun 18 03:10:13 localhost kernel: [26137.729140] radeon 0000:01:00.0: fence
driver on ring 5 use gpu addr 0x0000000000075a18 and cpu addr
0xffffc90011db5a18
Jun 18 03:10:14 localhost kernel: [26137.914127] [drm] ring test on 0 succeeded
in 3 usecs
Jun 18 03:10:14 localhost kernel: [26137.914133] [drm] ring test on 1 succeeded
in 1 usecs
Jun 18 03:10:14 localhost kernel: [26137.914138] [drm] ring test on 2 succeeded
in 1 usecs
Jun 18 03:10:14 localhost kernel: [26137.914202] [drm] ring test on 3 succeeded
in 2 usecs
Jun 18 03:10:14 localhost kernel: [26137.914211] [drm] ring test on 4 succeeded
in 1 usecs
Jun 18 03:10:14 localhost kernel: [26138.091289] [drm] ring test on 5 succeeded
in 2 usecs
Jun 18 03:10:14 localhost kernel: [26138.091296] [drm] UVD initialized
successfully.
Jun 18 03:10:14 localhost kernel: [26138.091385] [drm] ib test on ring 0
succeeded in 0 usecs
Jun 18 03:10:14 localhost kernel: [26138.091475] [drm] ib test on ring 1
succeeded in 0 usecs
Jun 18 03:10:14 localhost kernel: [26138.091601] [drm] ib test on ring 2
succeeded in 0 usecs
Jun 18 03:10:14 localhost kernel: [26138.091644] [drm] ib test on ring 3
succeeded in 0 usecs
Jun 18 03:10:14 localhost kernel: [26138.091679] [drm] ib test on ring 4
succeeded in 0 usecs
Jun 18 03:10:16 localhost kernel: [26140.121922] SysRq : Keyboard mode set to
system default
Jun 18 03:10:18 localhost kernel: [26141.841306] SysRq : Emergency Sync
Jun 18 03:10:18 localhost kernel: [26141.866011] Emergency Sync complete
Jun 18 03:10:18 localhost kernel: [26142.361117] SysRq : Emergency Sync
Jun 18 03:10:18 localhost kernel: [26142.383541] Emergency Sync complete
Jun 18 03:10:24 localhost kernel: [26148.238943] radeon 0000:01:00.0: ring 5
stalled for more than 10000msec
Jun 18 03:10:24 localhost kernel: [26148.238952] radeon 0000:01:00.0: GPU
lockup (waiting for 0x0000000000000004 last fence id 0x0000000000000002 on ring
5)
Jun 18 03:10:24 localhost kernel: [26148.238958] [drm:uvd_v1_0_ib_test] *ERROR*
radeon: fence wait failed (-35).
Jun 18 03:10:24 localhost kernel: [26148.238966] [drm:radeon_ib_ring_tests]
*ERROR* radeon: failed testing IB on ring 5 (-35).
Jun 18 03:10:24 localhost kernel: [26148.238995] [drm:radeon_pm_resume_dpm]
*ERROR* radeon: dpm resume failed
Jun 18 03:10:24 localhost kernel: [26148.262523] radeon 0000:01:00.0: GPU fault
detected: 146 0x05428804
Jun 18 03:10:24 localhost kernel: [26148.262534] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x0000A1AA
Jun 18 03:10:24 localhost kernel: [26148.262539] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x02088004
Jun 18 03:10:24 localhost kernel: [26148.262544] VM fault (0x04, vmid 1) at
page 41386, read from TC (136)
Jun 18 03:10:24 localhost kernel: [26148.262552] radeon 0000:01:00.0: GPU fault
detected: 146 0x06824804
Jun 18 03:10:24 localhost kernel: [26148.262556] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00000000
Jun 18 03:10:24 localhost kernel: [26148.262559] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x00000000
Jun 18 03:10:24 localhost kernel: [26148.262563] VM fault (0x00, vmid 0) at
page 0, read from unknown (0)
Jun 18 03:10:24 localhost kernel: [26148.262570] radeon 0000:01:00.0: GPU fault
detected: 146 0x05428404
Jun 18 03:10:24 localhost kernel: [26148.262573] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00000000
Jun 18 03:10:24 localhost kernel: [26148.262577] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x00000000
Jun 18 03:10:24 localhost kernel: [26148.262580] VM fault (0x00, vmid 0) at
page 0, read from unknown (0)
Jun 18 03:10:24 localhost kernel: [26148.262586] radeon 0000:01:00.0: GPU fault
detected: 146 0x06c24404
Jun 18 03:10:24 localhost kernel: [26148.262590] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00000000
Jun 18 03:10:24 localhost kernel: [26148.262593] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x00000000
Jun 18 03:10:24 localhost kernel: [26148.262597] VM fault (0x00, vmid 0) at
page 0, read from unknown (0)
Jun 18 03:10:24 localhost kernel: [26148.262603] radeon 0000:01:00.0: GPU fault
detected: 146 0x06228804
Jun 18 03:10:24 localhost kernel: [26148.262606] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00000000
Jun 18 03:10:24 localhost kernel: [26148.262610] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x00000000
Jun 18 03:10:24 localhost kernel: [26148.262613] VM fault (0x00, vmid 0) at
page 0, read from unknown (0)
Jun 18 03:10:24 localhost kernel: [26148.262619] radeon 0000:01:00.0: GPU fault
detected: 146 0x07024804
Jun 18 03:10:24 localhost kernel: [26148.262623] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00000000
Jun 18 03:10:24 localhost kernel: [26148.262626] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x00000000
Jun 18 03:10:24 localhost kernel: [26148.262629] VM fault (0x00, vmid 0) at
page 0, read from unknown (0)
Jun 18 03:10:24 localhost kernel: [26148.262635] radeon 0000:01:00.0: GPU fault
detected: 146 0x0802c804
Jun 18 03:10:24 localhost kernel: [26148.262639] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00000000
Jun 18 03:10:24 localhost kernel: [26148.262642] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x00000000
Jun 18 03:10:24 localhost kernel: [26148.262646] VM fault (0x00, vmid 0) at
page 0, read from unknown (0)
Jun 18 03:10:24 localhost kernel: [26148.262652] radeon 0000:01:00.0: GPU fault
detected: 146 0x0882c404
Jun 18 03:10:24 localhost kernel: [26148.262655] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00000000
Jun 18 03:10:24 localhost kernel: [26148.262659] radeon 0000:01:00.0:  
VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x00000000
===CUT===
(message about VM fault repeats several thousands times, some messages omitted
as they make full log about 3.5Mb).

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