[Bug 110976] New: [CI][BAT] igt at i915_selftest@live_contexts - incomplete - INFO: task kworker/* blocked for more than 61 seconds.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110976

            Bug ID: 110976
           Summary: [CI][BAT] igt at i915_selftest@live_contexts - incomplete
                    - INFO: task kworker/* blocked for more than 61
                    seconds.
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: martin.peres at free.fr
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6318/fi-bdw-gvtdvm/igt@i915_selftest@live_contexts.html

<3> [492.787366] INFO: task kworker/u2:13:2274 blocked for more than 61
seconds.
<3> [492.787762]       Tainted: G     U  W         5.2.0-rc5-CI-CI_DRM_6318+ #1
<3> [492.788064] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
<6> [492.788332] kworker/u2:13   D11744  2274      2 0x80004000
<6> [492.788400] Workqueue: i915 __i915_gem_free_work [i915]
<4> [492.788403] Call Trace:
<4> [492.788411]  ? __schedule+0x311/0x840
<4> [492.788418]  schedule+0x2e/0xb0
<4> [492.788421]  schedule_preempt_disabled+0xf/0x20
<4> [492.788423]  __mutex_lock+0x268/0x960
<4> [492.788426]  ? _raw_spin_unlock_irqrestore+0x39/0x60
<4> [492.788483]  ? __i915_gem_free_objects+0x86/0x660 [i915]
<4> [492.788544]  ? __i915_gem_free_objects+0x86/0x660 [i915]
<4> [492.788597]  __i915_gem_free_objects+0x86/0x660 [i915]
<4> [492.788654]  __i915_gem_free_work+0x5a/0x90 [i915]
<4> [492.788659]  process_one_work+0x245/0x610
<4> [492.788666]  worker_thread+0x37/0x380
<4> [492.788670]  ? process_one_work+0x610/0x610
<4> [492.788672]  kthread+0x119/0x130
<4> [492.788675]  ? kthread_park+0x80/0x80
<4> [492.788680]  ret_from_fork+0x3a/0x50
<4> [492.788689] 
Showing all locks held in the system:
<4> [492.788693] 1 lock held by khungtaskd/17:
<4> [492.788695]  #0: 000000003d017e58 (rcu_read_lock){....}, at:
debug_show_all_locks+0xe/0x1a0
<4> [492.788705] 1 lock held by in:imklog/354:
<4> [492.788714] 1 lock held by dmesg/996:
<4> [492.788716] 3 locks held by kworker/u2:13/2274:
<4> [492.788718]  #0: 00000000dcb04ba7 ((wq_completion)i915){+.+.}, at:
process_one_work+0x1bf/0x610
<4> [492.788722]  #1: 000000009cab02f6
((work_completion)(&i915->mm.free_work)){+.+.}, at:
process_one_work+0x1bf/0x610
<4> [492.788726]  #2: 00000000b86ebfd3 (&dev->struct_mutex){+.+.}, at:
__i915_gem_free_objects+0x86/0x660 [i915]
<4> [492.788781] 6 locks held by i915_selftest/3819:
<4> [492.788783] 
<4> [492.788784] =============================================

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