https://bugs.freedesktop.org/show_bug.cgi?id=104082
--- Comment #49 from Barto mister.freeman@laposte.net --- full log error, it seems related to ttm code, I use the radeon driver (not amdgpu) :
[20021.576712] radeon 0000:01:00.0: swiotlb buffer is full (sz: 2097152 bytes) [20021.576715] radeon 0000:01:00.0: swiotlb: coherent allocation failed, size=2097152 [20021.578048] CPU: 1 PID: 979 Comm: Compositor Not tainted 4.16.4-1-ARCH #1 [20021.578049] Hardware name: Gigabyte Technology Co., Ltd. P35-DS3L/P35-DS3L, BIOS F9 06/19/2009 [20021.578050] Call Trace: [20021.578062] dump_stack+0x5c/0x85 [20021.578066] swiotlb_alloc_coherent+0x1be/0x1d0 [20021.578078] ttm_dma_pool_get_pages+0x215/0x5d0 [ttm] [20021.578084] ttm_dma_populate+0x25b/0x350 [ttm] [20021.578088] ttm_tt_bind+0x2c/0x60 [ttm] [20021.578092] ttm_bo_handle_move_mem+0x577/0x5b0 [ttm] [20021.578097] ttm_bo_validate+0x120/0x130 [ttm] [20021.578119] ? drm_vma_offset_add+0x41/0x60 [drm] [20021.578122] ? csum_partial_copy_generic+0x9c2/0x1a00 [20021.578126] ttm_bo_init_reserved+0x395/0x460 [ttm] [20021.578130] ttm_bo_init+0x62/0xe0 [ttm] [20021.578161] ? radeon_update_memory_usage.isra.0+0x50/0x50 [radeon] [20021.578174] radeon_bo_create+0x180/0x240 [radeon] [20021.578189] ? radeon_update_memory_usage.isra.0+0x50/0x50 [radeon] [20021.578204] radeon_gem_object_create+0xa7/0x190 [radeon] [20021.578220] ? radeon_gem_pwrite_ioctl+0x30/0x30 [radeon] [20021.578235] radeon_gem_create_ioctl+0x66/0x100 [radeon] [20021.578250] ? radeon_gem_pwrite_ioctl+0x30/0x30 [radeon] [20021.578259] drm_ioctl_kernel+0x5b/0xb0 [drm] [20021.578268] drm_ioctl+0x2d5/0x370 [drm] [20021.578284] ? radeon_gem_pwrite_ioctl+0x30/0x30 [radeon] [20021.578288] ? __handle_mm_fault+0xc88/0x14d0 [20021.578290] ? cap_task_prctl+0x310/0x310 [20021.578302] radeon_drm_ioctl+0x49/0x80 [radeon] [20021.578305] do_vfs_ioctl+0xa4/0x630 [20021.578308] ? __do_page_fault+0x317/0x5a0 [20021.578310] SyS_ioctl+0x74/0x80 [20021.578313] do_syscall_64+0x74/0x190 [20021.578316] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [20021.578318] RIP: 0033:0x7f314a1b44c7 [20021.578319] RSP: 002b:00007f311c5fd3c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [20021.578321] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f314a1b44c7 [20021.578322] RDX: 00007f311c5fd440 RSI: 00000000c020645d RDI: 0000000000000007 [20021.578323] RBP: 00007f311c5fd440 R08: 0000000000000002 R09: 0000000000000000 [20021.578324] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000c020645d [20021.578325] R13: 0000000000000007 R14: 00007f31343d0000 R15: 0000000000000002