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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 - [BDW Regression]igt/gem_reset_stats/ban-bsd causes system hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88688">88688</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BDW Regression]igt/gem_reset_stats/ban-bsd 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>critical
</td>
</tr>
<tr>
<th>Priority</th>
<td>high
</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=112638" name="attach_112638" title="dmesg">attachment 112638</a> <a href="attachment.cgi?id=112638&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: Yes
good commit: 6f34cc393f6407fbec91ff6d4fd1e29fe86b59d5
bad commit: 93180785d44e3d417099e293b9ff6eeb4fd20aa2
no-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 causes system hang on drm-intel-nightly and drm-intel-next-queued kernel.
output:
IGT-Version: 1.9-g3d65ff7 (x86_64) (Linux:
3.19.0-rc4_drm-intel-nightly_d6bc7a_20150121+ x86_64)
Subtest ban-bsd: SUCCESS (14.499s)
Killed
dmesg:
[ 388.528466] BUG: unable to handle kernel paging request at 00000000ffffffff
[ 388.530132] IP: [<ffffffff8110dc5e>] kmem_cache_alloc_trace+0xce/0x104
[ 388.531802] PGD a1588067 PUD 0
[ 388.533461] Oops: 0000 [#1] SMP
[ 388.535115] Modules linked in: netconsole configfs ipv6 battery parport_pc
parport dm_mod ac acpi_cpufreq i915 button video drm_kms_helper drm cfbfillrect
cfbimgblt cfbcopyarea [last unloaded: netconsole]
[ 388.536955] CPU: 1 PID: 4755 Comm: systemd-udevd Not tainted
3.19.0-rc4_drm-intel-nightly_d6bc7a_20150121+ #718
[ 388.538755] task: ffff8800a75d9800 ti: ffff8800a1568000 task.ti:
ffff8800a1568000
[ 388.540552] RIP: 0010:[<ffffffff8110dc5e>] [<ffffffff8110dc5e>]
kmem_cache_alloc_trace+0xce/0x104
[ 388.542392] RSP: 0018:ffff8800a156bbf8 EFLAGS: 00010282
[ 388.544231] RAX: 0000000000000000 RBX: 0000000000000000 RCX:
0000000000002257
[ 388.546156] RDX: 0000000000002256 RSI: 00000000000000d0 RDI:
ffff88014a003900
[ 388.548021] RBP: 00000000ffffffff R08: 0000000000015520 R09:
0000000000000000
[ 388.549886] R10: ffff880149c52780 R11: ffff8b919a899a8a R12:
00000000000000d0
[ 388.551753] R13: 0000000000000080 R14: ffffffff8112e8e7 R15:
ffff88014a003900
[ 388.553622] FS: 00007f79f0568880(0000) GS:ffff88014ec40000(0000)
knlGS:0000000000000000
[ 388.555510] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 388.557397] CR2: 00000000ffffffff CR3: 00000000a1587000 CR4:
00000000003407e0
[ 388.559305] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 388.561198] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 388.563080] Stack:
[ 388.564938] ffff880002da8000 0000000000000000 ffff880002da8000
ffffffff817d22f0
[ 388.566836] ffff880002edca50 ffff880002da8010 ffffffff817d2660
ffffffff8112e8e7
[ 388.568731] 0000000000000000 ffff880002e9d580 ffff880002da8000
ffffffff8116d5d5
[ 388.570625] Call Trace:
[ 388.572500] [<ffffffff8112e8e7>] ? seq_open+0x2c/0x7f
[ 388.574379] [<ffffffff8116d5d5>] ? kernfs_fop_open+0x167/0x2be
[ 388.576260] [<ffffffff8116d46e>] ? kernfs_fop_release+0x4c/0x4c
[ 388.578133] [<ffffffff81111fe1>] ? do_dentry_open+0x184/0x2a6
[ 388.579993] [<ffffffff8111decc>] ? do_last+0x942/0xb75
[ 388.581844] [<ffffffff8111c2bd>] ? __inode_permission+0x2f/0x6e
[ 388.583692] [<ffffffff8111e231>] ? link_path_walk+0x51/0x74a
[ 388.585523] [<ffffffff8111f69c>] ? path_openat+0x20f/0x560
[ 388.587352] [<ffffffff81144eea>] ? ep_read_events_proc+0x92/0x92
[ 388.589174] [<ffffffff81120577>] ? do_filp_open+0x2b/0x6f
[ 388.590980] [<ffffffff81129b81>] ? __alloc_fd+0x58/0xe3
[ 388.592780] [<ffffffff811131b6>] ? do_sys_open+0x14b/0x1cf
[ 388.594565] [<ffffffff8179efd2>] ? system_call_fastpath+0x12/0x17
[ 388.596351] Code: 7e 08 45 89 e1 49 89 d8 4c 89 e9 48 89 ea 4c 89 fe 41 ff
16 [ 388.596467] [drm] Simulated gpu hang, resetting stop_rings
[ 388.596468] drm/i915: Resetting chip after gpu hang
[ 388.596491] [drm:gen8_init_common_ring] Execlists enabled for render ring
[ 388.596494] [drm:gen8_init_common_ring] Execlists enabled for bsd ring
[ 388.596505] [drm:gen8_init_common_ring] Execlists enabled for blitter ring
[ 388.596506] ------------[ cut here ]------------
==Reproduce steps==
----------------------------
1. ./gem_reset_stats --run-subtest ban-bsd</pre>
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