<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [HSW]igt/module_reload randomly causes system hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=65880">65880</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>xunx.fang@intel.com, yangweix.shui@intel.com
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[HSW]igt/module_reload randomly causes system hang
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>major
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>huax.lu@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=80986" name="attach_80986" title="dmesg">attachment 80986</a> <a href="attachment.cgi?id=80986&action=edit" title="dmesg">[details]</a></span>
dmesg
System Environment:
--------------------------
Arch: x86_64
Platform: Haswell
Kernel: (drm-intel-next-queued)cab8b5862acd55019fbeede6940d1a601912d6b8
Bug detailed description:
-----------------------------
module_reload randomly causes system hang, It happens 1 in 5 runs on haswell
with drm-intel-next-queued kernel.It works well on drm-intel-fixes kernel.
It also works well on Ivybridge.
output:
module successfully unloaded
Call trace:
[ 168.675415] ---[ end trace 51d2d549a433189e ]---
[ 168.675416] Kernel panic - not syncing: Fatal exception in interrupt
[ 168.686053] ------------[ cut here ]------------
[ 168.686158] WARNING: at arch/x86/kernel/smp.c:123
update_process_times+0x50/0x5c()
[ 168.686318] Modules linked in: i915(+) drm_kms_helper drm netconsole
configfs ipv6 dm_mod acpi_cpufreq coretemp kvm_intel kvm snd_hda_codec_realtek
microcode pcspkr i2c_i801 iTCO_wdt iTCO_vendor_support snd_hda_intel lpc_ich
snd_hda_codec mfd_core snd_hwdep snd_pcm snd_page_alloc snd_timer snd soundcore
video button mperf freq_table [last unloaded: drm]
[ 168.687894] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G D
3.10.0-rc5_nightlytop_c18149_20130618_+ #4155
[ 168.688052] Hardware name: Intel Corporation Shark Bay Client
platform/Flathead Creek Crb, BIOS HSWLPTU1.86C.0109.R03.1301282055 01/28/2013
[ 168.688221] ffffffff816deda2 0000000000000000 ffffffff8102c68d
ffff88024e20d218
[ 168.688535] 0000000000000000 ffff88024e20d120 ffffffff81a58410
0000000000000000
[ 168.688848] 0000000000000000 ffff88024e20d218 ffffffff81037010
ffff88024e20d350
[ 168.689155] Call Trace:
[ 168.689252] <IRQ> [<ffffffff816deda2>] ? dump_stack+0xd/0x17
[ 168.689438] [<ffffffff8102c68d>] ? warn_slowpath_common+0x5f/0x77
[ 168.689539] [<ffffffff81037010>] ? update_process_times+0x50/0x5c
[ 168.689647] [<ffffffff81064db5>] ? tick_sched_handle+0x30/0x3b
[ 168.689751] [<ffffffff81065073>] ? tick_sched_timer+0x30/0x4c
[ 168.689858] [<ffffffff8104778b>] ? __run_hrtimer.isra.25+0x4a/0xa2
[ 168.689962] [<ffffffff81047d47>] ? hrtimer_interrupt+0xe3/0x1de
[ 168.690067] [<ffffffff8101bc48>] ? smp_apic_timer_interrupt+0x7e/0x91
[ 168.690171] [<ffffffff816e960a>] ? apic_timer_interrupt+0x6a/0x70
[ 168.690275] [<ffffffff81048dcd>] ? up+0xb/0x36
[ 168.690379] [<ffffffff816daca8>] ? panic+0x184/0x1bb
[ 168.690481] [<ffffffff816dac1b>] ? panic+0xf7/0x1bb
[ 168.690585] [<ffffffff816e45bd>] ? oops_end+0x99/0xa6
[ 168.690685] [<ffffffff816da716>] ? no_context+0x24a/0x275
[ 168.690788] [<ffffffff816e67b5>] ? __atomic_notifier_call_chain+0xa/0xc
[ 168.690896] [<ffffffff816e66d1>] ? __do_page_fault+0x3cd/0x449
[ 168.691001] [<ffffffff8105294b>] ? enqueue_task_fair+0x7af/0x85b
[ 168.691107] [<ffffffff810508f0>] ? select_task_rq_fair+0x271/0x558
[ 168.691212] [<ffffffff8104c1f0>] ? check_preempt_curr+0x36/0x62
[ 168.691318] [<ffffffff8105294b>] ? enqueue_task_fair+0x7af/0x85b
[ 168.691424] [<ffffffff810410ac>] ? wq_worker_waking_up+0xb/0x51
[ 168.691530] [<ffffffff816e3c32>] ? page_fault+0x22/0x30
[ 168.691641] [<ffffffffa007751c>] ? ivb_can_enable_err_int+0x20/0x33 [i915]
[ 168.691755] [<ffffffffa007ccde>] ? ivybridge_irq_handler+0x429/0x491 [i915]
[ 168.691863] [<ffffffff81082bbb>] ? handle_irq_event_percpu+0x24/0x119
[ 168.691970] [<ffffffff81082cde>] ? handle_irq_event+0x2e/0x4c
[ 168.692075] [<ffffffff81085019>] ? handle_edge_irq+0xbb/0xde
[ 168.692175] [<ffffffff810038c1>] ? handle_irq+0x15/0x1d
[ 168.692279] [<ffffffff810035bd>] ? do_IRQ+0x41/0xa6
[ 168.692383] [<ffffffff816e3a2a>] ? common_interrupt+0x6a/0x6a
[ 168.692484] <EOI> [<ffffffff815ff34c>] ? cpuidle_enter_state+0x43/0xa6
[ 168.692665] [<ffffffff815ff345>] ? cpuidle_enter_state+0x3c/0xa6
[ 168.692770] [<ffffffff815ff46e>] ? cpuidle_idle_call+0xbf/0x10b
[ 168.692875] [<ffffffff810085cb>] ? arch_cpu_idle+0x6/0x17
[ 168.692979] [<ffffffff8105dd7c>] ? cpu_startup_entry+0xa1/0xfd
[ 168.693082] [<ffffffff81b08c6a>] ? start_kernel+0x378/0x383
[ 168.693186] [<ffffffff81b08708>] ? repair_env_string+0x57/0x57
[ 168.693290] ---[ end trace 51d2d549a433189f ]---
Reproduce steps:
----------------------------
1. run ./module_reload 5 cycles</pre>
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