igt@gem_tiled_wb - timeout - Per-test timeout exceeded. Killing the current test with SIGQUIT.

https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_108880v2/shard-skl10/igt@gem_tiled_wb.html

<4> [823.253398] [IGT] Per-test timeout exceeded. Killing the current test with SIGQUIT.
<6> [823.254118] sysrq: Show State
<6> [823.254881] task:systemd         state:S stack:12040 pid:    1 ppid:     0 flags:0x00000000
<6> [823.255005] Call Trace:
<6> [823.255034]  <TASK>
<6> [823.255124]  __schedule+0x30b/0xa80
<6> [823.255289]  schedule+0x4e/0xd0
<6> [823.255344]  schedule_hrtimeout_range_clock+0x11d/0x130
<6> [823.255406]  ? do_epoll_wait+0x759/0x8f0
<6> [823.255486]  ? _raw_write_unlock_irq+0x1f/0x50
<6> [823.255548]  ? lockdep_hardirqs_on+0xbf/0x140
<6> [823.255630]  do_epoll_wait+0x76a/0x8f0
<6> [823.255991]  ? ep_timeout_to_timespec.part.24+0xa0/0xa0
<6> [823.256131]  __x64_sys_epoll_wait+0x50/0x90
<6> [823.256181]  ? lockdep_hardirqs_on+0xbf/0x140
<6> [823.256272]  do_syscall_64+0x37/0x90
<6> [823.256331]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
<6> [823.256375] RIP: 0033:0x7f46582fc5ce
<6> [823.256415] RSP: 002b:00007ffc45bce700 EFLAGS: 00000293 ORIG_RAX: 00000000000000e8
<6> [823.256480] RAX: ffffffffffffffda RBX: 0000562ce7a4b590 RCX: 00007f46582fc5ce
<6> [823.256516] RDX: 0000000000000050 RSI: 0000562ce7b7da80 RDI: 0000000000000004
<6> [823.256551] RBP: ffffffffffffffff R08: 0000000000000000 R09: 0000000000000e10
<6> [823.256587] R10: 00000000ffffffff R11: 0000000000000293 R12: 0000000000000001
<6> [823.256621] R13: 0000000000000050 R14: 0000562ce6076883 R15: 0000000000000000