[Bug 110848] [BXT] Everything using GPU gets stuck after running+killing parallel Media loads

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110848

--- Comment #51 from David Weinehall <david.weinehall at intel.com> ---
Testing with a kernel using your wip-mutex branch gives the following:

[  774.826181] general protection fault: 0000 [#1] PREEMPT SMP PTI
[  774.826192] CPU: 3 PID: 4859 Comm: h264parse0:sink Not tainted
5.3.0-rc6-CI-Custom_4349+ #1
[  774.826195] Hardware name: To Be Filled By O.E.M. To Be Filled By
O.E.M./J4205-ITX, BIOS P1.40 07/14/2017
[  774.826253] RIP: 0010:i915_request_await_dma_fence+0x303/0x420 [i915]
[  774.826258] Code: 00 84 4a 30 0f 85 26 ff ff ff 48 8b 83 a0 00 00 00 4c 8b
bb 90 02 00 00 48 05 c0 00 00 00 49 39 c7 74 29 49 8b 86 a0 00 00 00 <49> 8b b7
98 fd ff ff 41 8b 97 a0 fd ff ff 48 8d b8 f0 00 00 00 e8
[  774.826261] RSP: 0018:ffffc900018b39b0 EFLAGS: 00010283
[  774.826265] RAX: ffff888272178800 RBX: ffff8881ca561080 RCX:
0000000000000000
[  774.826267] RDX: ffff888263f80000 RSI: ffffffff82661d60 RDI:
ffff888204495f40
[  774.826270] RBP: ffffc900018b39c8 R08: 0000000000000001 R09:
ffffffffa0208c00
[  774.826273] R10: 0000000000000000 R11: 0000000000000000 R12:
ffff8881e2813d48
[  774.826275] R13: ffffc900018b39c8 R14: ffff8881e2813c80 R15:
dead000000000122
[  774.826279] FS:  00007f927aef6700(0000) GS:ffff888277f80000(0000)
knlGS:0000000000000000
[  774.826281] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  774.826284] CR2: 00007f1da83b2000 CR3: 00000001e467e000 CR4:
00000000003406e0
[  774.826287] Call Trace:
[  774.826338]  i915_request_await_object+0x248/0x380 [i915]
[  774.826345]  ? __mutex_unlock_slowpath+0x4b/0x2b0
[  774.826387]  i915_gem_do_execbuffer+0x18a1/0x1e00 [i915]
[  774.826404]  ? __lock_acquire+0x25f/0x1cc0
[  774.826452]  ? i915_gem_execbuffer_ioctl+0x2e0/0x2e0 [i915]
[  774.826492]  i915_gem_execbuffer2_ioctl+0x103/0x420 [i915]
[  774.826534]  ? i915_gem_execbuffer_ioctl+0x2e0/0x2e0 [i915]
[  774.826540]  drm_ioctl_kernel+0x88/0xf0
[  774.826546]  drm_ioctl+0x2f8/0x3b0
[  774.826587]  ? i915_gem_execbuffer_ioctl+0x2e0/0x2e0 [i915]
[  774.826598]  do_vfs_ioctl+0xa5/0x6f0
[  774.826605]  ? __fget+0x114/0x200
[  774.826611]  ksys_ioctl+0x3a/0x70
[  774.826616]  __x64_sys_ioctl+0x16/0x20
[  774.826621]  do_syscall_64+0x5a/0x1c0
[  774.826627]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  774.826631] RIP: 0033:0x7f92861395d7
[  774.826635] Code: b3 66 90 48 8b 05 b1 48 2d 00 64 c7 00 26 00 00 00 48 c7
c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01
f0 ff ff 73 01 c3 48 8b 0d 81 48 2d 00 f7 d8 64 89 01 48
[  774.826638] RSP: 002b:00007f927aef5068 EFLAGS: 00000246 ORIG_RAX:
0000000000000010
[  774.826641] RAX: ffffffffffffffda RBX: 0000000000000043 RCX:
00007f92861395d7
[  774.826644] RDX: 00007f927aef5110 RSI: 00000000c0406469 RDI:
0000000000000006
[  774.826647] RBP: 00007f927aef5090 R08: 0000555c6cfa1890 R09:
0000000000000000
[  774.826649] R10: 0000000000000000 R11: 0000000000000246 R12:
00007f927aef5110
[  774.826652] R13: 00000000c0406469 R14: 0000000000000006 R15:
0000555c6cfa1770
[  774.826661] Modules linked in: fuse snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic i915 x86_pkg_temp_thermal coretemp crct10dif_pclmul
crc32_pclmul snd_hda_intel snd_intel_nhlt lpc_ich snd_hda_codec snd_hwdep
snd_hda_core snd_pcm r8169 pinctrl_broxton mei_me pinctrl_intel realtek mei
sunrpc
[  774.826681] ---[ end trace 867abd8886fa79e0 ]---
[  774.826724] RIP: 0010:i915_request_await_dma_fence+0x303/0x420 [i915]
[  774.826728] Code: 00 84 4a 30 0f 85 26 ff ff ff 48 8b 83 a0 00 00 00 4c 8b
bb 90 02 00 00 48 05 c0 00 00 00 49 39 c7 74 29 49 8b 86 a0 00 00 00 <49> 8b b7
98 fd ff ff 41 8b 97 a0 fd ff ff 48 8d b8 f0 00 00 00 e8
[  774.826731] RSP: 0018:ffffc900018b39b0 EFLAGS: 00010283
[  774.826734] RAX: ffff888272178800 RBX: ffff8881ca561080 RCX:
0000000000000000
[  774.826737] RDX: ffff888263f80000 RSI: ffffffff82661d60 RDI:
ffff888204495f40
[  774.826740] RBP: ffffc900018b39c8 R08: 0000000000000001 R09:
ffffffffa0208c00
[  774.826742] R10: 0000000000000000 R11: 0000000000000000 R12:
ffff8881e2813d48
[  774.826745] R13: ffffc900018b39c8 R14: ffff8881e2813c80 R15:
dead000000000122
[  774.826748] FS:  00007f927aef6700(0000) GS:ffff888277f80000(0000)
knlGS:0000000000000000
[  774.826751] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  774.826754] CR2: 00007f1da83b2000 CR3: 00000001e467e000 CR4:
00000000003406e0

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