linux-kernel - radeon 0000:01:00.0: swiotlb buffer is full (sz: 2097152 bytes)

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Date:   Wed, 17 Jan 2018 22:03:49 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>
Cc:     lkml <linux-kernel@...r.kernel.org>
Subject: radeon 0000:01:00.0: swiotlb buffer is full (sz: 2097152 bytes)

Hi guys,

seen this already?

I see it has happened during resume. Kernel is rc7+tip/master.

Box is stable otherwise while I'm working on it...

[66861.818432] usb 10-1: USB disconnect, device number 2
[75380.827447] perf: interrupt took too long (2527 > 2500), lowering kernel.perf_event_max_sample_rate to 79000
[94022.728431] radeon 0000:01:00.0: swiotlb buffer is full (sz: 2097152 bytes)
[94022.735717] swiotlb: coherent allocation failed for device 0000:01:00.0 size=2097152
[94022.743525] CPU: 2 PID: 3069 Comm: Xorg Not tainted 4.15.0-rc7+ #4
[94022.749711] Hardware name: To be filled by O.E.M. To be filled by O.E.M./M5A97 EVO R2.0, BIOS 1503 01/16/2013
[94022.749711] Call Trace:
[94022.749717]  dump_stack+0x67/0x8f
[94022.749720]  swiotlb_alloc_coherent+0x169/0x170
[94022.749726]  ttm_dma_pool_get_pages+0x1ea/0x450 [ttm]
[94022.749731]  ttm_dma_populate+0x248/0x330 [ttm]
[94022.749734]  ttm_tt_bind+0x23/0x50 [ttm]
[94022.749737]  ttm_bo_handle_move_mem+0x3a1/0x3e0 [ttm]
[94022.749741]  ? ttm_bo_mem_space+0x3bc/0x4a0 [ttm]
[94022.749744]  ttm_bo_validate+0x139/0x150 [ttm]
[94022.749746]  ? _raw_write_unlock+0x12/0x30
[94022.749748]  ? drm_vma_offset_add+0x6a/0x90
[94022.749751]  ttm_bo_init_reserved+0x3a5/0x470 [ttm]
[94022.749754]  ttm_bo_init+0x4d/0xb0 [ttm]
[94022.749778]  ? radeon_update_memory_usage.isra.0+0x60/0x60 [radeon]
[94022.749784]  ? drm_gem_object_init+0x31/0x50
[94022.749796]  radeon_bo_create+0x1bf/0x290 [radeon]
[94022.749809]  ? radeon_update_memory_usage.isra.0+0x60/0x60 [radeon]
[94022.749822]  radeon_gem_object_create+0xa9/0x1b0 [radeon]
[94022.749835]  ? radeon_gem_pwrite_ioctl+0x30/0x30 [radeon]
[94022.749848]  radeon_gem_create_ioctl+0x6a/0xf0 [radeon]
[94022.749862]  ? radeon_gem_pwrite_ioctl+0x30/0x30 [radeon]
[94022.749863]  drm_ioctl_kernel+0x6e/0xd0
[94022.749865]  ? unix_state_double_unlock+0x30/0x30
[94022.749866]  drm_ioctl+0x33b/0x3f0
[94022.749879]  ? radeon_gem_pwrite_ioctl+0x30/0x30 [radeon]
[94022.749881]  ? preempt_count_sub+0xa8/0x100
[94022.749882]  ? _raw_spin_unlock_irqrestore+0x25/0x50
[94022.749883]  ? preempt_count_sub+0xa8/0x100
[94022.749894]  radeon_drm_ioctl+0x5d/0xa0 [radeon]
[94022.749896]  do_vfs_ioctl+0xa2/0x600
[94022.749898]  ? __fget+0x67/0xb0
[94022.749899]  SyS_ioctl+0x4c/0x90
[94022.749901]  entry_SYSCALL_64_fastpath+0x22/0x8a
[94022.749902] RIP: 0033:0x7f28b58145e7
[94022.749903] RSP: 002b:00007ffdac6c6948 EFLAGS: 00000246
[94022.770322] radeon 0000:01:00.0: swiotlb buffer is full (sz: 2097152 bytes)
[94022.770323] swiotlb: coherent allocation failed for device 0000:01:00.0 size=2097152

-- 
Regards/Gruss,
    Boris.

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