Re: ✓ Fi.CI.BAT: success for dma-buf: Extend selftests to exercise dma-fence-array

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Quoting Patchwork (2019-08-24 15:18:25)
> == Series Details ==
> 
> Series: dma-buf: Extend selftests to exercise dma-fence-array
> URL   : https://patchwork.freedesktop.org/series/65736/
> State : success
> 
> == Summary ==
> 
> CI Bug Log - changes from CI_DRM_6783 -> Patchwork_14182
> ====================================================
> 
> Summary
> -------
> 
>   **SUCCESS**
> 
>   No regressions found.
> 
>   External URL: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14182/
> 
> New tests
> ---------
> 
>   New tests have been introduced between CI_DRM_6783 and Patchwork_14182:
> 
> ### New IGT tests (1) ###
> 
>   * igt@dmabuf@dma_fence_array:
>     - Statuses : 42 pass(s)
>     - Exec time: [0.02, 0.07] s

Pass?

<6> [535.797646] [IGT] dmabuf: starting subtest dma_fence_array
<6> [535.798913] dma-buf: Running dma_fence_array
<6> [535.799112] dma-buf: Running dma_fence_array/empty
<6> [535.799168] dma-buf: Running dma_fence_array/stub
<6> [535.799181] dma-buf: Running dma_fence_array/single
<6> [535.799238] dma-buf: Running dma_fence_array/pair
<6> [535.799264] dma-buf: Running dma_fence_array/repeat
<6> [535.799284] dma-buf: Running dma_fence_array/recurse_stub
<4> [535.799297]
<4> [535.799299] ============================================
<4> [535.799300] WARNING: possible recursive locking detected
<4> [535.799301] 5.3.0-rc5-CI-Patchwork_14182+ #1 Tainted: G     U
<4> [535.799302] --------------------------------------------
<4> [535.799303] dmabuf/5021 is trying to acquire lock:
<4> [535.799304] 0000000064cf0cf8 (&(&array->lock)->rlock){-...}, at: dma_fence_add_callback+0x39/0x1f0
<4> [535.799308]
but task is already holding lock:
<4> [535.799309] 0000000045940bf4 (&(&array->lock)->rlock){-...}, at: dma_fence_enable_sw_signaling+0x45/0x130
<4> [535.799311]
other info that might help us debug this:
<4> [535.799312]  Possible unsafe locking scenario:

<4> [535.799313]        CPU0
<4> [535.799313]        ----
<4> [535.799314]   lock(&(&array->lock)->rlock);
<4> [535.799315]   lock(&(&array->lock)->rlock);
<4> [535.799316]
 *** DEADLOCK ***

<4> [535.799316]  May be due to missing lock nesting notation

<4> [535.799317] 1 lock held by dmabuf/5021:
<4> [535.799318]  #0: 0000000045940bf4 (&(&array->lock)->rlock){-...}, at: dma_fence_enable_sw_signaling+0x45/0x130
<4> [535.799320]
stack backtrace:
<4> [535.799321] CPU: 7 PID: 5021 Comm: dmabuf Tainted: G     U            5.3.0-rc5-CI-Patchwork_14182+ #1
<4> [535.799323] Hardware name: Intel Corporation WhiskeyLake Client Platform/CometLake U DDR4 HR ERB, BIOS CMLSFWR1.R00.1125.D00.1903221424 03/22/2019
<4> [535.799323] Call Trace:
<4> [535.799326]  dump_stack+0x67/0x9b
<4> [535.799329]  __lock_acquire+0x12a7/0x1e90
<4> [535.799332]  lock_acquire+0xa6/0x1c0
<4> [535.799333]  ? dma_fence_add_callback+0x39/0x1f0
<4> [535.799335]  ? dma_fence_array_create+0xc0/0xc0
<4> [535.799337]  _raw_spin_lock_irqsave+0x33/0x50
<4> [535.799338]  ? dma_fence_add_callback+0x39/0x1f0
<4> [535.799340]  dma_fence_add_callback+0x39/0x1f0
<4> [535.799341]  dma_fence_array_enable_signaling+0x87/0xe0
<4> [535.799343]  dma_fence_enable_sw_signaling+0x58/0x130
<4> [535.799346]  recurse_stub+0x9e/0x170 [dmabuf_selftests]
<4> [535.799348]  __subtests+0x187/0x1c0 [dmabuf_selftests]
<4> [535.799351]  dma_fence_array+0x45/0x5e [dmabuf_selftests]
<4> [535.799353]  st_init+0x74/0x1000 [dmabuf_selftests]
<4> [535.799354]  ? 0xffffffffa0049000
<4> [535.799356]  do_one_initcall+0x58/0x300
<4> [535.799358]  ? do_init_module+0x1d/0x1f6
<4> [535.799360]  ? rcu_read_lock_sched_held+0x6f/0x80
<4> [535.799363]  ? kmem_cache_alloc_trace+0x2d1/0x300
<4> [535.799365]  do_init_module+0x56/0x1f6
<4> [535.799366]  load_module+0x25bd/0x2a40
<4> [535.799370]  ? __se_sys_finit_module+0xd3/0xf0
<4> [535.799371]  __se_sys_finit_module+0xd3/0xf0
<4> [535.799374]  do_syscall_64+0x55/0x1c0
<4> [535.799376]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [535.799377] RIP: 0033:0x7fc774a2d839
<4> [535.799379] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 1f f6 2c 00 f7 d8 64 89 01 48
<4> [535.799380] RSP: 002b:00007fff97dadfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
<4> [535.799381] RAX: ffffffffffffffda RBX: 00005587a9f8ed70 RCX: 00007fc774a2d839
<4> [535.799382] RDX: 0000000000000000 RSI: 00005587a9f8dc20 RDI: 0000000000000006
<4> [535.799383] RBP: 00005587a9f8dc20 R08: 0000000000000010 R09: 0000000000000000
<4> [535.799384] R10: 00007fff97dae200 R11: 0000000000000246 R12: 0000000000000000
<4> [535.799385] R13: 00005587a9f8b000 R14: 0000000000000020 R15: 000000000000001b
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