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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [ivb] mutex deadlock"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89166">89166</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[ivb] mutex deadlock
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>blocker
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>[ 600.562671] INFO: task kworker/u32:5:99 blocked for more than 120 seconds.
[ 600.562691] Not tainted 3.19.0+ #251
[ 600.562694] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 600.562697] kworker/u32:5 D ffff88009c183c98 0 99 2 0x00000000
[ 600.562710] Workqueue: i915 intel_unpin_work_fn
[ 600.562716] ffff88009c183c98 ffff8802561c4010 ffff88009c122010
ffff88009c183c68
[ 600.562726] ffffffff8157c84e ffff88009c183cc8 ffff88009c183fd8
ffff880255bef864
[ 600.562736] ffff88009c122010 00000000ffffffff ffff880255bef868
ffff88009c183cb8
[ 600.562746] Call Trace:
[ 600.562753] [<ffffffff8157c84e>] ? schedule_preempt_disabled+0xe/0x10
[ 600.562760] [<ffffffff8157c787>] schedule+0x37/0x90
[ 600.562765] [<ffffffff8157c84e>] schedule_preempt_disabled+0xe/0x10
[ 600.562769] [<ffffffff8157e553>] __mutex_lock_slowpath+0x93/0x100
[ 600.562773] [<ffffffff8157e5db>] mutex_lock+0x1b/0x30
[ 600.562778] [<ffffffff813d5a73>] intel_user_framebuffer_destroy+0x23/0xa0
[ 600.562783] [<ffffffff8135e58e>] drm_framebuffer_free+0x4e/0x60
[ 600.562788] [<ffffffff8135eed5>] drm_framebuffer_unreference+0x35/0x70
[ 600.562792] [<ffffffff813d62e8>] intel_unpin_work_fn+0x68/0x150
[ 600.562797] [<ffffffff810a054d>] process_one_work+0x14d/0x410
[ 600.562802] [<ffffffff810a087b>] worker_thread+0x6b/0x470
[ 600.562806] [<ffffffff810a0810>] ? process_one_work+0x410/0x410
[ 600.562810] [<ffffffff810a5e2b>] kthread+0xdb/0x100
[ 600.562814] [<ffffffff810a5d50>] ? __kthread_parkme+0x90/0x90
[ 600.562818] [<ffffffff815805ac>] ret_from_fork+0x7c/0xb0
[ 600.562822] [<ffffffff810a5d50>] ? __kthread_parkme+0x90/0x90</pre>
</div>
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