<html>
<head>
<base href="https://bugs.freedesktop.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI][DRMTIP] igt@gem_create@create-clear - dmesg-warn - rcu_preempt detected stalls on CPUs/tasks"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110776">110776</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[CI][DRMTIP] igt@gem_create@create-clear - dmesg-warn - rcu_preempt detected stalls on CPUs/tasks
</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>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>lakshminarayana.vudum@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><a href="https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_294/fi-pnv-d510/igt@gem_create@create-clear.html">https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_294/fi-pnv-d510/igt@gem_create@create-clear.html</a>
<6> [421.425230] Console: switching to colour dummy device 80x25
<6> [421.425754] [IGT] gem_create: executing
<6> [421.452614] [IGT] gem_create: starting subtest create-clear
<6> [457.714835] [IGT] gem_create: exiting, ret=0
<5> [457.728596] Setting dangerous option reset - tainting kernel
<3> [483.636080] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
<3> [483.636082] rcu: Tasks blocked on level-0 rcu_node (CPUs 0-3): P851
<4> [483.636082] (detected by 3, t=65002 jiffies, g=225453, q=48621)
<6> [483.636082] java R running task 13832 851 812
0x00004000
<4> [483.636082] Call Trace:
<4> [483.636082] ? mark_held_locks+0x49/0x70
<4> [483.636082] ? trace_hardirqs_on_thunk+0x1a/0x1c
<4> [483.636082] ? lockdep_hardirqs_on+0xe3/0x1b0
<4> [483.636082] ? trace_hardirqs_on_thunk+0x1a/0x1c
<4> [483.636082] ? retint_kernel+0x2b/0x2b
<4> [483.636082] ? lock_is_held_type+0xfb/0x120
<4> [483.636082] ? lock_is_held_type+0x8/0x120
<4> [483.636082] ? xas_load+0xa/0x50
<4> [483.636082] ? find_get_entry+0xa2/0x300
<4> [483.636082] ? pagecache_get_page+0x2b/0x220
<4> [483.636082] ? lookup_swap_cache+0x3b/0x100
<4> [483.636082] ? do_swap_page+0x86/0x910
<4> [483.636082] ? __handle_mm_fault+0x66a/0xfa0
<4> [483.636082] ? handle_mm_fault+0x155/0x350
<4> [483.636082] ? __do_page_fault+0x248/0x4f0
<4> [483.636082] ? page_fault+0x8/0x30
<4> [483.636082] ? page_fault+0x1e/0x30
<3> [554.628258] INFO: task gem_create:1101 blocked for more than 61 seconds.
<3> [554.628635] Tainted: G U W
5.2.0-rc1-ga388075b2bdc-drmtip_294+ #1
<3> [554.628786] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
<6> [554.628937] gem_create D13320 1101 999 0x00004000
<4> [554.628967] Call Trace:
<4> [554.629007] ? __schedule+0x311/0x840
<4> [554.629044] ? wait_for_common+0x116/0x1f0
<4> [554.629224] schedule+0x2e/0xb0
<4> [554.629246] schedule_timeout+0x21b/0x3d0
<4> [554.629268] ? lock_acquire+0xa6/0x1c0
<4> [554.629296] ? wait_for_common+0x116/0x1f0
<4> [554.629316] ? mark_held_locks+0x49/0x70
<4> [554.629335] ? _raw_spin_unlock_irq+0x24/0x50
<4> [554.629362] ? wait_for_common+0x116/0x1f0
<4> [554.629380] wait_for_common+0x13a/0x1f0
<4> [554.629405] ? wake_up_q+0x80/0x80
<4> [554.629443] rcu_barrier+0x11c/0x190
<4> [554.629683] i915_drop_caches_set+0xb1/0x270 [i915]
<4> [554.629726] simple_attr_write+0xb0/0xd0
<4> [554.629759] full_proxy_write+0x51/0x80
<4> [554.629791] vfs_write+0xbd/0x1b0
<4> [554.629820] ksys_write+0x8f/0xe0
<4> [554.629854] do_syscall_64+0x55/0x1c0
<4> [554.629877] entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [554.629894] RIP: 0033:0x7fda39e562b7
<4> [554.629917] Code: Bad RIP value.
<4> [554.629930] RSP: 002b:00007ffd8916df60 EFLAGS: 00000293 ORIG_RAX:
0000000000000001
<4> [554.629947] RAX: ffffffffffffffda RBX: 0000000000000008 RCX:
00007fda39e562b7
<4> [554.629960] RDX: 0000000000000005 RSI: 00007ffd8916dfe0 RDI:
0000000000000008
<4> [554.629972] RBP: 00007ffd8916dfe0 R08: 0000000000000000 R09:
0000000000000000
<4> [554.629985] R10: 0000000000000000 R11: 0000000000000293 R12:
0000000000000005
<4> [554.629998] R13: 0000000000000008 R14: 00007ffd8916dfe0 R15:
00007fda39e40d80
<4> [554.630161]
Showing all locks held in the system:
<4> [554.630195] 1 lock held by khungtaskd/33:
<4> [554.630206] #0: 0000000029a5d521 (rcu_read_lock){....}, at:
debug_show_all_locks+0xe/0x1a0
<4> [554.630273] 1 lock held by in:imklog/326:
<4> [554.630298] 2 locks held by java/851:
<4> [554.630312] 2 locks held by java/852:
<4> [554.630333] 1 lock held by dmesg/982:
<4> [554.630349] 3 locks held by gem_create/1101:
<4> [554.630361] #0: 00000000843912bb (sb_writers#14){.+.+}, at:
vfs_write+0x18e/0x1b0
<4> [554.630394] #1: 0000000044713cf1 (&attr->mutex){+.+.}, at:
simple_attr_write+0x36/0xd0
<4> [554.630423] #2: 00000000f8d8f89c (rcu_state.barrier_mutex){+.+.}, at:
rcu_barrier+0x23/0x190
<4> [554.630455]
<4> [554.630466] =============================================
<6> [601.299333] Console: switching to colour frame buffer device 128x48</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
<li>You are the QA Contact for the bug.</li>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>