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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BDW]igt/pm_rps/reset sporadically causes system hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88654">88654</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BDW]igt/pm_rps/reset sporadically causes system hang
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<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>huax.lu@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=112588" name="attach_112588" title="dmesg">attachment 112588</a> <a href="attachment.cgi?id=112588&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: not sure, fail rate:2/4
on-working platforms: BDW
==kernel==
--------------------------
drm-intel-nightly/d6bc7a6a0a7573350e8be8ec54002c20d1dbe1e0
commit d6bc7a6a0a7573350e8be8ec54002c20d1dbe1e0
Author: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Date: Tue Jan 20 15:10:59 2015 +0100
drm-intel-nightly: 2015y-01m-20d-14h-10m-40s UTC integration manifest
==Bug detailed description==
-----------------------------
It sporadically causes system hang on BDW. This case also has <a class="bz_bug_link
bz_status_NEW "
title="NEW - [BDW Bisected]igt/pm_rps/reset crash when execlists enabled"
href="show_bug.cgi?id=88096">bug 88096</a>.
output:
IGT-Version: 1.9-ga29f28e (x86_64) (Linux:
3.19.0-rc4_drm-intel-nightly_d6bc7a_20150121+ x86_64)
(pm_rps:4777) intel-batchbuffer-CRITICAL: Test assertion failure function
intel_batchbuffer_flush_on_ring, file intel_batchbuffer.c:180:
(pm_rps:4777) intel-batchbuffer-CRITICAL: Failed assertion:
(drm_intel_gem_bo_context_exec(batch->bo, ctx, used, ring)) == 0
(pm_rps:4777) intel-batchbuffer-CRITICAL: Last errno: 16, Device or resource
busy
Subtest reset: FAIL (85.746s)
(pm_rps:4776) CRITICAL: Test assertion failure function loaded_check, file
pm_rps.c:509:
(pm_rps:4776) CRITICAL: Failed assertion: freqs[CUR] == freqs[MAX]
(pm_rps:4776) CRITICAL: error: 450 != 900
Subtest reset: FAIL (88.748s)
(pm_rps:4776) CRITICAL: Test assertion failure function load_helper_stop, file
pm_rps.c:290:
(pm_rps:4776) CRITICAL: Failed assertion: igt_wait_helper(&lh.igt_proc) == 0
(pm_rps:4776) CRITICAL: Last errno: 10, No child processes
pm_rps: igt_core.c:880: igt_fail: Assertion `!test_with_subtests || in_fixture'
failed.
dmesg:
[ 135.692079] WARNING: CPU: 1 PID: 4777 at
drivers/gpu/drm/i915/intel_lrc.c:506
intel_logical_ring_advance_and_submit+0x73/0x254 [i915]()
[ 135.694123] execlist context submission without request
[ 135.694167] Modules linked in: netconsole configfs ipv6 dm_mod ac
acpi_cpufreq i915 button video drm_kms_helper drm cfbfillrect cfbimgblt
cfbcopyarea [last unloaded: netconsole]
[ 135.698342] CPU: 1 PID: 4777 Comm: pm_rps Not tainted
3.19.0-rc4_drm-intel-nightly_d6bc7a_20150121+ #718
[ 135.700497] 0000000000000000 0000000000000009 ffffffff81799600
ffff880148eeba78
[ 135.702677] ffffffff8103bdcc 0000000000000000 ffffffffa00ba85f
0000000000020000
[ 135.704854] ffff880002ed18b8 0000000000000000 ffff880002ed0000
ffff8801493b5600
[ 135.707025] Call Trace:
[ 135.709171] [<ffffffff81799600>] ? dump_stack+0x40/0x50
[ 135.711307] [<ffffffff8103bdcc>] ? warn_slowpath_common+0x98/0xb0
[ 135.713437] [<ffffffffa00ba85f>] ?
intel_logical_ring_advance_and_submit+0x73/0x254 [i915]
[ 135.715562] [<ffffffff8103be7c>] ? warn_slowpath_fmt+0x45/0x4a
[ 135.717675] [<ffffffffa00ba85f>] ?
intel_logical_ring_advance_and_submit+0x73/0x254 [i915]
[ 135.719785] [<ffffffffa010bb08>] ? logical_ring_wait_for_space+0xc2/0x150
[i915]
[ 135.721887] [<ffffffffa00bad26>] ? intel_logical_ring_begin+0xea/0x1ea
[i915]
[ 135.723992] [<ffffffff8110d473>] ? kmem_cache_free+0xf6/0x134
[ 135.726096] [<ffffffffa00baf02>] ? gen8_emit_flush_render+0x3d/0xe1 [i915]
[ 135.728198] [<ffffffffa00bb37e>] ? intel_execlists_submission+0x230/0x34b
[i915]
[ 135.730306] [<ffffffffa009e24b>] ?
i915_gem_do_execbuffer.isra.12+0xc21/0xd08 [i915]
[ 135.732425] [<ffffffff813f40e5>] ? __pm_runtime_resume+0x5b/0x6a
[ 135.734533] [<ffffffff8110d850>] ? __kmalloc+0x66/0x151
[ 135.736622] [<ffffffffa009f285>] ? i915_gem_execbuffer2+0x172/0x209 [i915]
[ 135.738709] [<ffffffffa009f113>] ? i915_gem_execbuffer+0x350/0x350 [i915]
[ 135.740782] [<ffffffffa001070a>] ? drm_ioctl+0x279/0x3bc [drm]
[ 135.742861] [<ffffffff8113363d>] ? __inode_wait_for_writeback+0x5c/0xa2
[ 135.744917] [<ffffffff81081217>] ? ktime_get+0x44/0x80
[ 135.746948] [<ffffffffa009f113>] ? i915_gem_execbuffer+0x350/0x350 [i915]
[ 135.748957] [<ffffffff8107d542>] ? hrtimer_try_to_cancel+0xa0/0xab
[ 135.750939] [<ffffffff8107d559>] ? hrtimer_cancel+0xc/0x16
[ 135.752891] [<ffffffff811222f5>] ? do_vfs_ioctl+0x412/0x459
[ 135.754847] [<ffffffff8107dead>] ? hrtimer_nanosleep+0x89/0x10b
[ 135.756787] [<ffffffff8107d1bb>] ? update_rmtp+0x60/0x60
[ 135.758711] [<ffffffff81122385>] ? SyS_ioctl+0x49/0x78
[ 135.760624] [<ffffffff8179efd2>] ? system_call_fastpath+0x12/0x17
[ 135.762552] ---[ end trace 9955234f7d4f624c ]---
[ 135.764486] ------------[ cut here ]------------
[ 135.766402] WARNING: CPU: 3 PID: 4777 at include/linux/kref.h:47
intel_logical_ring_advance_and_submit+0xed/0x254 [i915]()
==Reproduce steps==
----------------------------
1. ./pm_rps --run-subtest reset</pre>
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