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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 - kmem_cache_destroy - possible recursive locking detected"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97381">97381</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>kmem_cache_destroy - possible recursive locking detected
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</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>matthew.auld@intel.com
</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>Created <span class=""><a href="attachment.cgi?id=125843" name="attach_125843" title="dmesg">attachment 125843</a> <a href="attachment.cgi?id=125843&action=edit" title="dmesg">[details]</a></span>
dmesg
[ 706.898063] =============================================
[ 706.898078] [ INFO: possible recursive locking detected ]
[ 706.898094] 4.8.0-rc2-drm-intel-debug+ #21 Tainted: G U W
[ 706.898108] ---------------------------------------------
[ 706.898123] rmmod/1889 is trying to acquire lock:
[ 706.898137] (&(&n->list_lock)->rlock){-.-...}, at: [<ffffffff8151e7bb>]
get_partial_node+0x5b/0x460
[ 706.898172]
but task is already holding lock:
[ 706.898196] (&(&n->list_lock)->rlock){-.-...}, at: [<ffffffff81525f1c>]
__kmem_cache_shutdown+0xac/0x670
[ 706.898227]
other info that might help us debug this:
[ 706.898252] Possible unsafe locking scenario:
[ 706.898276] CPU0
[ 706.898288] ----
[ 706.898300] lock(&(&n->list_lock)->rlock);
[ 706.898315] lock(&(&n->list_lock)->rlock);
[ 706.898330]
*** DEADLOCK ***
See attachment for the rest.</pre>
</div>
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