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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>high
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BSW Regression]igt/gem_persistent_relocs/forked-interruptible-faulting-reloc causes system hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=81732">81732</a>
</td>
</tr>
<tr>
<th>Keywords</th>
<td>bisect_pending
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BSW Regression]igt/gem_persistent_relocs/forked-interruptible-faulting-reloc causes system hang
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jinxianx.guo@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</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=103425" name="attach_103425" title="dmesg on fixes branch">attachment 103425</a> <a href="attachment.cgi?id=103425&action=edit" title="dmesg on fixes branch">[details]</a></span>
dmesg on fixes branch
==System Environment==
--------------------------
Regression: Yes
Good commit on -next-queued: 91565c85b66db820f01894a971d39aaef60c4325
Non-working platforms: BSW
==kernel==
--------------------------
origin/drm-intel-nightly: 089bea2664988de48fccc81407ebe12115156731(fails)
drm-intel-nightly: 2014y-07m-24d-09h-55m-38s integration manifest
origin/drm-intel-next-queued: 2b8ee5710915a244b807fbe3427299d007d19e89(works)
drm/i915: Allow overlapping userptr objects
origin/drm-intel-fixes: eedd10f45bdcb2a5b2afa35f845e080c3bc984f2(CallTrace
while running the test, please check attachment)
drm/i915: Simplify i915_gem_release_all_mmaps()
==Bug detailed description==
-----------------------------
igt/gem_persistent_relocs/forked-interruptible-faulting-reloc causes system
hang
Unable get dmesg because system hang.
Output:
[root@x-bsw01 tests]# ./gem_persistent_relocs --run-subtest
forked-interruptible-faulting-reloc
IGT-Version: 1.7-g4d4f4b2 (x86_64) (Linux:
3.16.0-rc6_drm-intel-nightly_089bea_20140725_debug+ x86_64)
Dmesg shows on -fixes branch:
[ 72.374279] WARNING: CPU: 1 PID: 3800 at
drivers/gpu/drm/i915/intel_uncore.c:132 gen6_gt_check_fifodbg.isra.12+0x38/0x47
[i915]()
[ 72.380584] GT wake FIFO error 0x1080000
[ 72.386839] Modules linked in: dm_mod snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_codec_generic pcspkr serio_raw snd_hda_intel
snd_hda_controller snd_hda_codec snd_hwdep r8169 snd_pcm snd_timer snd
soundcore battery ac i915 button video drm_kms_helper drm option usb_wwan
usbserial
[ 72.400570] CPU: 1 PID: 3800 Comm: gem_persistent_ Tainted: G W
3.16.0-rc6_drm-intel-fixes_eedd10_20140725_debug+ #798
[ 72.407573] 0000000000000009 ffff88007508f9c8 ffffffff8182f9df
0000000000000046
[ 72.414614] ffff88007508fa18 ffff88007508fa08 ffffffff8103fa1c
0000000000000000
[ 72.421614] ffffffffa01213d1 0000000001080000 ffff880002c50078
00000000049980c8
[ 72.428590] Call Trace:
[ 72.435480] [<ffffffff8182f9df>] dump_stack+0x46/0x58
[ 72.442412] [<ffffffff8103fa1c>] warn_slowpath_common+0x81/0x9b
[ 72.449388] [<ffffffffa01213d1>] ? gen6_gt_check_fifodbg.isra.12+0x38/0x47
[i915]
[ 72.456381] [<ffffffff8103fad9>] warn_slowpath_fmt+0x46/0x48
[ 72.463402] [<ffffffffa011f597>] ? __gen6_gt_wait_for_thread_c0+0x3a/0x95
[i915]
[ 72.470470] [<ffffffffa01213d1>] gen6_gt_check_fifodbg.isra.12+0x38/0x47
[i915]
[ 72.477555] [<ffffffffa0121480>] __vlv_force_wake_put+0x3c/0x3e [i915]
[ 72.484636] [<ffffffffa0120d2c>] gen6_read32+0x78/0xeb [i915]
[ 72.491700] [<ffffffffa011b29d>] gen6_ring_get_seqno+0x2c/0x3a [i915]
[ 72.498760] [<ffffffffa01053a5>] __wait_seqno+0x252/0x458 [i915]
[ 72.505770] [<ffffffff8107754d>] ? __init_waitqueue_head+0x50/0x50
[ 72.512825] [<ffffffffa0105dd8>] i915_wait_seqno+0x6f/0x78 [i915]
[ 72.519867] [<ffffffffa0105e15>] i915_gem_object_wait_rendering+0x34/0x4f
[i915]
[ 72.526926] [<ffffffffa010aff8>]
i915_gem_object_set_to_gtt_domain+0x54/0x181 [i915]
[ 72.533986] [<ffffffffa010b6b1>] i915_gem_pwrite_ioctl+0x261/0x7f8 [i915]
[ 72.540995] [<ffffffff811139f4>] ? might_fault+0x43/0x93
[ 72.548024] [<ffffffffa007423f>] drm_ioctl+0x2bd/0x425 [drm]
[ 72.555092] [<ffffffffa010b450>] ? i915_gem_set_domain_ioctl+0xf6/0xf6
[i915]
[ 72.562182] [<ffffffff810bf0b1>] ? __audit_syscall_exit+0x1f4/0x213
[ 72.569273] [<ffffffff8114b525>] do_vfs_ioctl+0x455/0x49f
[ 72.576325] [<ffffffff81097ccf>] ? current_kernel_time+0x64/0xa0
[ 72.583408] [<ffffffff81080d2d>] ? trace_hardirqs_on_caller+0x142/0x19e
[ 72.590379] [<ffffffff81080d96>] ? trace_hardirqs_on+0xd/0xf
[ 72.597195] [<ffffffff8114b5c2>] SyS_ioctl+0x53/0x81
[ 72.603734] [<ffffffff81837112>] system_call_fastpath+0x16/0x1b
Reproduce steps:
-------------------------
1. ./gem_persistent_relocs --run-subtest forked-interruptible-faulting-reloc</pre>
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