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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI][SNB,HSW,APL,KBl] igt@prime_mmap@test_userptr - possible circular locking dependency detected"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102939">102939</a>
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<th>Summary</th>
<td>[CI][SNB,HSW,APL,KBl] igt@prime_mmap@test_userptr - possible circular locking dependency detected
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>DRI git
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>DRM/Intel
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>marta.lofstedt@intel.com
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<pre>From CI_DRM_3118 on SNB-, HSW-, APL- and KBL-shards:
new test: igt@prime_mmap@test_userptr:
[ 29.531667] ======================================================
[ 29.531670] WARNING: possible circular locking dependency detected
[ 29.531673] 4.14.0-rc1-CI-CI_DRM_3119+ #1 Tainted: G U
[ 29.531676] ------------------------------------------------------
[ 29.531679] prime_mmap/1521 is trying to acquire lock:
[ 29.531681] (cpu_hotplug_lock.rw_sem){++++}, at: [<ffffffff8109dbb7>]
apply_workqueue_attrs+0x17/0x50
[ 29.531691]
but task is already holding lock:
[ 29.531694] (&dev_priv->mm_lock){+.+.}, at: [<ffffffffa0151b2a>]
i915_gem_userptr_init__mmu_notifier+0x14a/0x270 [i915]
[ 29.531742]
which lock already depends on the new lock.
<a href="https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3118/shard-snb4/igt@prime_mmap@test_userptr.html">https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3118/shard-snb4/igt@prime_mmap@test_userptr.html</a>
<a href="https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3118/shard-hsw6/igt@prime_mmap@test_userptr.html">https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3118/shard-hsw6/igt@prime_mmap@test_userptr.html</a>
<a href="https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3118/shard-apl2/igt@prime_mmap@test_userptr.html">https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3118/shard-apl2/igt@prime_mmap@test_userptr.html</a>
<a href="https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3118/shard-kbl3/igt@prime_mmap@test_userptr.html">https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3118/shard-kbl3/igt@prime_mmap@test_userptr.html</a></pre>
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