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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI] igt@kms_addfb_basic@bad-pitch-0 - dmesg-warn - possible circular locking dependency detected"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103096">103096</a>
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<th>Summary</th>
<td>[CI] igt@kms_addfb_basic@bad-pitch-0 - dmesg-warn - 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
</td>
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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>
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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>On CI_DRM_3167 all shards dmesg-warn on lockdep:
[ 56.872627] ======================================================
[ 56.872629] WARNING: possible circular locking dependency detected
[ 56.872632] 4.14.0-rc3-CI-CI_DRM_3167+ #1 Tainted: G U
[ 56.872634] ------------------------------------------------------
[ 56.872637] kms_addfb_basic/1462 is trying to acquire lock:
[ 56.872639] (&dev->struct_mutex){+.+.}, at: [<ffffffffa01cc7d1>]
i915_mutex_lock_interruptible+0x51/0x130 [i915]
[ 56.872680]
but task is already holding lock:
[ 56.872682] (&mm->mmap_sem){++++}, at: [<ffffffff8104adad>]
__do_page_fault+0x10d/0x570
[ 56.872687]
which lock already depends on the new lock.
[ 56.872690]
the existing dependency chain (in reverse order) is:
Note, this is not reproduced on CI_DRM_3168 nor CI_DRM_3169
Full data:
<a href="https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3167/shard-snb6/igt@kms_addfb_basic@bad-pitch-0.html">https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3167/shard-snb6/igt@kms_addfb_basic@bad-pitch-0.html</a>
<a href="https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3167/shard-hsw3/igt@kms_addfb_basic@bad-pitch-0.html">https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3167/shard-hsw3/igt@kms_addfb_basic@bad-pitch-0.html</a>
<a href="https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3167/shard-apl5/igt@kms_addfb_basic@bad-pitch-0.html">https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3167/shard-apl5/igt@kms_addfb_basic@bad-pitch-0.html</a>
<a href="https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3167/shard-kbl6/igt@kms_addfb_basic@bad-pitch-0.html">https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3167/shard-kbl6/igt@kms_addfb_basic@bad-pitch-0.html</a></pre>
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