[ 4693.934585] amdgpu 0000:01:00.0: swiotlb buffer is full (sz: 2097152 bytes)
[ 4693.934587] swiotlb: coherent allocation failed for device 0000:01:00.0 size=2097152
[ 4693.934590] CPU: 4 PID: 1701 Comm: X Tainted: G           O     4.15.0-1-default #1
[ 4693.934591] Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./970A-DS3P, BIOS FD 02/26/2016
[ 4693.934592] Call Trace:
[ 4693.934599]  dump_stack+0x85/0xc5
[ 4693.934602]  swiotlb_alloc_coherent+0xe0/0x160
[ 4693.934609]  ttm_dma_pool_get_pages+0x1cb/0x590 [ttm]
[ 4693.934615]  ttm_dma_populate+0x24d/0x340 [ttm]
[ 4693.934619]  ttm_tt_bind+0x29/0x60 [ttm]
[ 4693.934623]  ttm_bo_handle_move_mem+0x5da/0x610 [ttm]
[ 4693.934628]  ttm_bo_validate+0x117/0x130 [ttm]
[ 4693.934646]  ? drm_vma_offset_add+0x41/0x60 [drm]
[ 4693.934650]  ttm_bo_init_reserved+0x38f/0x430 [ttm]
[ 4693.934708]  amdgpu_bo_do_create+0x184/0x3e0 [amdgpu]
[ 4693.934747]  ? amdgpu_fill_buffer+0x2e0/0x2e0 [amdgpu]
[ 4693.934784]  amdgpu_bo_create+0x3d/0x210 [amdgpu]
[ 4693.934818]  amdgpu_gem_object_create+0x6a/0xf0 [amdgpu]
[ 4693.934854]  ? amdgpu_gem_object_close+0x1b0/0x1b0 [amdgpu]
[ 4693.934887]  amdgpu_gem_create_ioctl+0x1c3/0x240 [amdgpu]
[ 4693.934921]  ? amdgpu_gem_object_close+0x1b0/0x1b0 [amdgpu]
[ 4693.934930]  drm_ioctl_kernel+0x5b/0xb0 [drm]
[ 4693.934941]  drm_ioctl+0x2ad/0x350 [drm]
[ 4693.934975]  ? amdgpu_gem_object_close+0x1b0/0x1b0 [amdgpu]
[ 4693.934978]  ? ep_read_events_proc+0xb0/0xb0
[ 4693.934980]  ? timerqueue_add+0x52/0x80
[ 4693.935011]  amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
[ 4693.935014]  do_vfs_ioctl+0x90/0x5f0
[ 4693.935016]  ? __sys_recvmsg+0x5d/0x70
[ 4693.935018]  SyS_ioctl+0x74/0x80
[ 4693.935021]  entry_SYSCALL_64_fastpath+0x2f/0xa1
[ 4693.935023] RIP: 0033:0x7fbd3ff17377
[ 4693.935023] RSP: 002b:00007ffc45f33c48 EFLAGS: 00003246
[ 4701.348008] amdgpu 0000:01:00.0: swiotlb buffer is full (sz: 2097152 bytes)
[ 4701.348011] swiotlb: coherent allocation failed for device 0000:01:00.0 size=2097152
[ 4701.348015] CPU: 1 PID: 1701 Comm: X Tainted: G           O     4.15.0-1-default #1
[ 4701.348016] Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./970A-DS3P, BIOS FD 02/26/2016
[ 4701.348018] Call Trace:
[ 4701.348027]  dump_stack+0x85/0xc5
[ 4701.348031]  swiotlb_alloc_coherent+0xe0/0x160
[ 4701.348042]  ttm_dma_pool_get_pages+0x1cb/0x590 [ttm]
[ 4701.348050]  ttm_dma_populate+0x24d/0x340 [ttm]
[ 4701.348057]  ttm_tt_bind+0x29/0x60 [ttm]
[ 4701.348064]  ttm_bo_handle_move_mem+0x5da/0x610 [ttm]
[ 4701.348072]  ttm_bo_validate+0x117/0x130 [ttm]
[ 4701.348098]  ? drm_vma_offset_add+0x41/0x60 [drm]
[ 4701.348105]  ttm_bo_init_reserved+0x38f/0x430 [ttm]
[ 4701.348185]  amdgpu_bo_do_create+0x184/0x3e0 [amdgpu]
[ 4701.348240]  ? amdgpu_fill_buffer+0x2e0/0x2e0 [amdgpu]
[ 4701.348294]  amdgpu_bo_create+0x3d/0x210 [amdgpu]
[ 4701.348349]  amdgpu_gem_object_create+0x6a/0xf0 [amdgpu]
[ 4701.348404]  ? amdgpu_gem_object_close+0x1b0/0x1b0 [amdgpu]
[ 4701.348458]  amdgpu_gem_create_ioctl+0x1c3/0x240 [amdgpu]
[ 4701.348513]  ? amdgpu_gem_object_close+0x1b0/0x1b0 [amdgpu]
[ 4701.348529]  drm_ioctl_kernel+0x5b/0xb0 [drm]
[ 4701.348546]  drm_ioctl+0x2ad/0x350 [drm]
[ 4701.348600]  ? amdgpu_gem_object_close+0x1b0/0x1b0 [amdgpu]
[ 4701.348604]  ? ep_read_events_proc+0xb0/0xb0
[ 4701.348607]  ? timerqueue_add+0x52/0x80
[ 4701.348659]  amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
[ 4701.348663]  do_vfs_ioctl+0x90/0x5f0
[ 4701.348666]  ? __sys_recvmsg+0x5d/0x70
[ 4701.348669]  SyS_ioctl+0x74/0x80
[ 4701.348673]  entry_SYSCALL_64_fastpath+0x2f/0xa1
[ 4701.348676] RIP: 0033:0x7fbd3ff17377
[ 4701.348678] RSP: 002b:00007ffc45f33c48 EFLAGS: 00003246
[ 4703.105073] amdgpu 0000:01:00.0: swiotlb buffer is full (sz: 2097152 bytes)
[ 4703.105077] swiotlb: coherent allocation failed for device 0000:01:00.0 size=2097152
[ 4703.105082] CPU: 0 PID: 1701 Comm: X Tainted: G           O     4.15.0-1-default #1
[ 4703.105083] Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./970A-DS3P, BIOS FD 02/26/2016
[ 4703.105085] Call Trace:
[ 4703.105094]  dump_stack+0x85/0xc5
[ 4703.105100]  swiotlb_alloc_coherent+0xe0/0x160
[ 4703.105112]  ttm_dma_pool_get_pages+0x1cb/0x590 [ttm]
[ 4703.105123]  ttm_dma_populate+0x24d/0x340 [ttm]
[ 4703.105131]  ttm_tt_bind+0x29/0x60 [ttm]
[ 4703.105139]  ttm_bo_handle_move_mem+0x5da/0x610 [ttm]
[ 4703.105148]  ttm_bo_validate+0x117/0x130 [ttm]
[ 4703.105177]  ? drm_vma_offset_add+0x41/0x60 [drm]
[ 4703.105186]  ttm_bo_init_reserved+0x38f/0x430 [ttm]
[ 4703.105270]  amdgpu_bo_do_create+0x184/0x3e0 [amdgpu]
[ 4703.105330]  ? amdgpu_fill_buffer+0x2e0/0x2e0 [amdgpu]
[ 4703.105336]  ? __switch_to_asm+0x40/0x70
[ 4703.105396]  amdgpu_bo_create+0x3d/0x210 [amdgpu]
[ 4703.105459]  amdgpu_gem_object_create+0x6a/0xf0 [amdgpu]
[ 4703.105523]  ? amdgpu_gem_object_close+0x1b0/0x1b0 [amdgpu]
[ 4703.105584]  amdgpu_gem_create_ioctl+0x1c3/0x240 [amdgpu]
[ 4703.105647]  ? amdgpu_gem_object_close+0x1b0/0x1b0 [amdgpu]
[ 4703.105666]  drm_ioctl_kernel+0x5b/0xb0 [drm]
[ 4703.105686]  drm_ioctl+0x2ad/0x350 [drm]
[ 4703.105747]  ? amdgpu_gem_object_close+0x1b0/0x1b0 [amdgpu]
[ 4703.105751]  ? futex_wake+0x83/0x150
[ 4703.105803]  amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
[ 4703.105808]  do_vfs_ioctl+0x90/0x5f0
[ 4703.105811]  SyS_ioctl+0x74/0x80
[ 4703.105815]  entry_SYSCALL_64_fastpath+0x2f/0xa1
[ 4703.105818] RIP: 0033:0x7fbd3ff17377
[ 4703.105819] RSP: 002b:00007ffc45f33c48 EFLAGS: 00003246
[ 5440.766329] amdgpu 0000:01:00.0: swiotlb buffer is full (sz: 2097152 bytes)
[ 5440.766330] swiotlb: coherent allocation failed for device 0000:01:00.0 size=2097152
[ 5440.766333] CPU: 5 PID: 1979 Comm: plasmashell Tainted: G           O     4.15.0-1-default #1
[ 5440.766334] Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./970A-DS3P, BIOS FD 02/26/2016
[ 5440.766334] Call Trace:
[ 5440.766341]  dump_stack+0x85/0xc5
[ 5440.766343]  swiotlb_alloc_coherent+0xe0/0x160
[ 5440.766350]  ttm_dma_pool_get_pages+0x1cb/0x590 [ttm]
[ 5440.766355]  ttm_dma_populate+0x24d/0x340 [ttm]
[ 5440.766358]  ttm_tt_bind+0x29/0x60 [ttm]
[ 5440.766362]  ttm_bo_handle_move_mem+0x5da/0x610 [ttm]
[ 5440.766366]  ttm_bo_validate+0x117/0x130 [ttm]
[ 5440.766383]  ? drm_vma_offset_add+0x41/0x60 [drm]
[ 5440.766387]  ttm_bo_init_reserved+0x38f/0x430 [ttm]
[ 5440.766445]  amdgpu_bo_do_create+0x184/0x3e0 [amdgpu]
[ 5440.766472]  ? amdgpu_fill_buffer+0x2e0/0x2e0 [amdgpu]
[ 5440.766475]  ? __switch_to_asm+0x40/0x70
[ 5440.766502]  amdgpu_bo_create+0x3d/0x210 [amdgpu]
[ 5440.766530]  amdgpu_gem_object_create+0x6a/0xf0 [amdgpu]
[ 5440.766558]  ? amdgpu_gem_object_close+0x1b0/0x1b0 [amdgpu]
[ 5440.766585]  amdgpu_gem_create_ioctl+0x1c3/0x240 [amdgpu]
[ 5440.766613]  ? amdgpu_gem_object_close+0x1b0/0x1b0 [amdgpu]
[ 5440.766622]  drm_ioctl_kernel+0x5b/0xb0 [drm]
[ 5440.766630]  drm_ioctl+0x2ad/0x350 [drm]
[ 5440.766658]  ? amdgpu_gem_object_close+0x1b0/0x1b0 [amdgpu]
[ 5440.766685]  amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
[ 5440.766687]  do_vfs_ioctl+0x90/0x5f0
[ 5440.766689]  SyS_ioctl+0x74/0x80
[ 5440.766691]  entry_SYSCALL_64_fastpath+0x2f/0xa1
[ 5440.766692] RIP: 0033:0x7f0956f47377
[ 5440.766693] RSP: 002b:00007ffc18e76da8 EFLAGS: 00000246
[ 5440.788265] amdgpu 0000:01:00.0: swiotlb buffer is full (sz: 2097152 bytes)
[ 5440.788267] swiotlb: coherent allocation failed for device 0000:01:00.0 size=2097152
[ 5440.788270] CPU: 5 PID: 1979 Comm: plasmashell Tainted: G           O     4.15.0-1-default #1
[ 5440.788271] Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./970A-DS3P, BIOS FD 02/26/2016
[ 5440.788271] Call Trace:
[ 5440.788278]  dump_stack+0x85/0xc5
[ 5440.788281]  swiotlb_alloc_coherent+0xe0/0x160
[ 5440.788288]  ttm_dma_pool_get_pages+0x1cb/0x590 [ttm]
[ 5440.788292]  ttm_dma_populate+0x24d/0x340 [ttm]
[ 5440.788296]  ttm_tt_bind+0x29/0x60 [ttm]
[ 5440.788300]  ttm_bo_handle_move_mem+0x5da/0x610 [ttm]
[ 5440.788304]  ttm_bo_validate+0x117/0x130 [ttm]
[ 5440.788323]  ? drm_vma_offset_add+0x41/0x60 [drm]
[ 5440.788327]  ttm_bo_init_reserved+0x38f/0x430 [ttm]
[ 5440.788392]  amdgpu_bo_do_create+0x184/0x3e0 [amdgpu]
[ 5440.788420]  ? amdgpu_fill_buffer+0x2e0/0x2e0 [amdgpu]
[ 5440.788423]  ? __switch_to_asm+0x40/0x70
[ 5440.788450]  amdgpu_bo_create+0x3d/0x210 [amdgpu]
[ 5440.788479]  amdgpu_gem_object_create+0x6a/0xf0 [amdgpu]
[ 5440.788507]  ? amdgpu_gem_object_close+0x1b0/0x1b0 [amdgpu]
[ 5440.788535]  amdgpu_gem_create_ioctl+0x1c3/0x240 [amdgpu]
[ 5440.788563]  ? amdgpu_gem_object_close+0x1b0/0x1b0 [amdgpu]
[ 5440.788571]  drm_ioctl_kernel+0x5b/0xb0 [drm]
[ 5440.788581]  drm_ioctl+0x2ad/0x350 [drm]
[ 5440.788609]  ? amdgpu_gem_object_close+0x1b0/0x1b0 [amdgpu]
[ 5440.788636]  amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
[ 5440.788638]  do_vfs_ioctl+0x90/0x5f0
[ 5440.788640]  SyS_ioctl+0x74/0x80
[ 5440.788642]  entry_SYSCALL_64_fastpath+0x2f/0xa1
[ 5440.788644] RIP: 0033:0x7f0956f47377