[13279.408803] amdgpu 0000:03:00.0: swiotlb buffer is full (sz: 2097152 bytes)
[13279.408804] swiotlb: coherent allocation failed for device 0000:03:00.0 size=2097152
[13279.408805] CPU: 3 PID: 18447 Comm: hl2_linux Not tainted 4.15.0-rc4-mainline #1
[13279.408806] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z87 Extreme6, BIOS P2.40 07/08/2014
[13279.408806] Call Trace:
[13279.408811]  dump_stack+0x5c/0x85
[13279.408814]  swiotlb_alloc_coherent+0xe0/0x150
[13279.408818]  ttm_dma_pool_get_pages+0x1f0/0x5b0 [ttm]
[13279.408820]  ttm_dma_populate+0x24d/0x340 [ttm]
[13279.408821]  ttm_tt_bind+0x23/0x50 [ttm]
[13279.408823]  ttm_bo_handle_move_mem+0x5cd/0x600 [ttm]
[13279.408824]  ttm_bo_validate+0x12f/0x140 [ttm]
[13279.408830]  ? drm_irq_install+0x11/0x130 [drm]
[13279.408832]  ttm_bo_init_reserved+0x26d/0x420 [ttm]
[13279.408852]  amdgpu_bo_do_create+0x1b0/0x420 [amdgpu]
[13279.408867]  ? amdgpu_fill_buffer+0x300/0x300 [amdgpu]
[13279.408881]  ? amdgpu_vm_bo_update+0x3d5/0x5e0 [amdgpu]
[13279.408892]  amdgpu_bo_create+0x50/0x270 [amdgpu]
[13279.408894]  ? ttm_eu_backoff_reservation+0x4d/0x70 [ttm]
[13279.408906]  amdgpu_gem_object_create+0x7f/0x110 [amdgpu]
[13279.408918]  amdgpu_gem_create_ioctl+0x126/0x270 [amdgpu]
[13279.408930]  ? amdgpu_gem_object_close+0x1e0/0x1e0 [amdgpu]
[13279.408932]  drm_ioctl_kernel+0x59/0xb0 [drm]
[13279.408935]  drm_ioctl+0x2d5/0x370 [drm]
[13279.408946]  ? amdgpu_gem_object_close+0x1e0/0x1e0 [amdgpu]
[13279.408948]  ? __sys_recvmsg+0x7d/0x90
[13279.408958]  amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
[13279.408975]  amdgpu_kms_compat_ioctl+0x10/0x20 [amdgpu]
[13279.408977]  compat_SyS_ioctl+0x465/0x1170
[13279.408979]  do_fast_syscall_32+0x97/0x214
[13279.408981]  entry_SYSENTER_compat+0x4c/0x5b
[13391.597054] amdgpu 0000:03:00.0: swiotlb buffer is full (sz: 2097152 bytes)
[13391.597055] swiotlb: coherent allocation failed for device 0000:03:00.0 size=2097152
[13391.597056] CPU: 6 PID: 5151 Comm: Xorg Not tainted 4.15.0-rc4-mainline #1
[13391.597057] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z87 Extreme6, BIOS P2.40 07/08/2014
[13391.597057] Call Trace:
[13391.597063]  dump_stack+0x5c/0x85
[13391.597065]  swiotlb_alloc_coherent+0xe0/0x150
[13391.597069]  ttm_dma_pool_get_pages+0x1f0/0x5b0 [ttm]
[13391.597071]  ttm_dma_populate+0x24d/0x340 [ttm]
[13391.597073]  ttm_tt_bind+0x23/0x50 [ttm]
[13391.597075]  ttm_bo_handle_move_mem+0x5cd/0x600 [ttm]
[13391.597077]  ttm_bo_validate+0x12f/0x140 [ttm]
[13391.597083]  ? drm_irq_install+0x11/0x130 [drm]
[13391.597085]  ttm_bo_init_reserved+0x38f/0x420 [ttm]
[13391.597106]  amdgpu_bo_do_create+0x1b0/0x420 [amdgpu]
[13391.597125]  ? amdgpu_fill_buffer+0x300/0x300 [amdgpu]
[13391.597127]  ? unix_write_space+0xe/0xa0
[13391.597140]  amdgpu_bo_create+0x50/0x270 [amdgpu]
[13391.597141]  ? kmem_cache_free+0x1d1/0x1f0
[13391.597155]  amdgpu_gem_object_create+0x7f/0x110 [amdgpu]
[13391.597169]  ? amdgpu_gem_object_close+0x1e0/0x1e0 [amdgpu]
[13391.597182]  amdgpu_gem_create_ioctl+0x1d9/0x270 [amdgpu]
[13391.597195]  ? amdgpu_gem_object_close+0x1e0/0x1e0 [amdgpu]
[13391.597198]  drm_ioctl_kernel+0x59/0xb0 [drm]
[13391.597202]  drm_ioctl+0x2d5/0x370 [drm]
[13391.597215]  ? amdgpu_gem_object_close+0x1e0/0x1e0 [amdgpu]
[13391.597217]  ? ep_scan_ready_list.constprop.16+0x208/0x210
[13391.597218]  ? timerqueue_add+0x52/0x80
[13391.597230]  amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
[13391.597232]  do_vfs_ioctl+0xa1/0x610
[13391.597233]  ? __sys_recvmsg+0x4e/0x90
[13391.597234]  ? __sys_recvmsg+0x7d/0x90
[13391.597235]  SyS_ioctl+0x74/0x80
[13391.597237]  entry_SYSCALL_64_fastpath+0x1a/0x7d
[13391.597238] RIP: 0033:0x7fd49b229337
[13391.597238] RSP: 002b:00007ffd8baaf708 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[13391.597239] RAX: ffffffffffffffda RBX: 0000561581b2b350 RCX: 00007fd49b229337
[13391.597240] RDX: 00007ffd8baaf750 RSI: 00000000c0206440 RDI: 000000000000000d
[13391.597240] RBP: 00007ffd8bab00c0 R08: 000056158153c0d0 R09: 00005615808b3010
[13391.597241] R10: 00007fd49b4eeaa0 R11: 0000000000000246 R12: 0000000040086409
[13391.597241] R13: 000000000000000d R14: 0000000000000001 R15: 00005615817f8f50