[Bug 99295] [Regression BDW] kernel panic in Intel i915 module, complete system freeze in 4.10-rc2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99295

--- Comment #27 from freedesktop at 3.141.email ---
My kernel still crashes after having applied the patch.

However the stack-trace is different.  I don't know if this crash is really
related.

```
Apr 14 09:39:15 hobbes kernel: Oops: 0002 [#1] PREEMPT SMP
Apr 14 09:39:15 hobbes kernel: Modules linked in: ctr ccm bnep
snd_hda_codec_hdmi snd_hda_codec_conexant snd_hda_codec_generic hid_generic
uvcvideo v
Apr 14 09:39:15 hobbes kernel:  intel_powerclamp coretemp kvm_intel kvm
irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc snd_hda_inte
Apr 14 09:39:15 hobbes kernel:  crc32c_intel ahci libahci xhci_pci xhci_hcd
libata rtsx_pci scsi_mod usbcore usb_common i8042 serio
Apr 14 09:39:15 hobbes kernel: CPU: 3 PID: 49 Comm: kswapd0 Tainted: G         
 O    4.10.9-1-ARCH #1
Apr 14 09:39:15 hobbes kernel: Hardware name: LENOVO 20FCS02400/20FCS02400,
BIOS N1FET37W (1.11 ) 03/15/2016
Apr 14 09:39:15 hobbes kernel: task: ffff88021870bb00 task.stack:
ffffc90000ffc000
Apr 14 09:39:15 hobbes kernel: RIP: 0010:bitmap_clear+0x3e/0x80
Apr 14 09:39:15 hobbes kernel: RSP: 0000:ffffc90000fffa28 EFLAGS: 00010206
Apr 14 09:39:15 hobbes kernel: RAX: 0000000171426008 RBX: 0000000000000042 RCX:
ffffffffffffffff
Apr 14 09:39:15 hobbes kernel: RDX: 00000000000001be RSI: 0000000000000042 RDI:
0000000000000003
Apr 14 09:39:15 hobbes kernel: RBP: ffffc90000fffa28 R08: ffffffffffffffff R09:
0000000171426040
Apr 14 09:39:15 hobbes kernel: R10: 0000000000000180 R11: 0000000000000006 R12:
0000000001000000
Apr 14 09:39:15 hobbes kernel: R13: 00000000e3a42000 R14: ffff8800b4488680 R15:
ffff88018f57e000
Apr 14 09:39:15 hobbes kernel: FS:  0000000000000000(0000)
GS:ffff880222580000(0000) knlGS:0000000000000000
Apr 14 09:39:15 hobbes kernel: CS:  0010 DS: 0000 ES: 0000 CR0:
0000000080050033
Apr 14 09:39:15 hobbes kernel: CR2: 0000000171426008 CR3: 0000000002a09000 CR4:
00000000003406e0
Apr 14 09:39:15 hobbes kernel: Call Trace:
Apr 14 09:39:15 hobbes kernel:  gen8_ppgtt_clear_pdp+0x16b/0x4b0 [i915]
Apr 14 09:39:15 hobbes kernel:  gen8_ppgtt_clear_range+0x102/0x1a0 [i915]
Apr 14 09:39:15 hobbes kernel:  ppgtt_unbind_vma+0x21/0x30 [i915]
Apr 14 09:39:15 hobbes kernel:  i915_vma_unbind+0x73/0x300 [i915]
Apr 14 09:39:15 hobbes kernel:  i915_gem_object_unbind+0xc8/0x120 [i915]
Apr 14 09:39:15 hobbes kernel:  i915_gem_shrink+0x227/0x4a0 [i915]
Apr 14 09:39:15 hobbes kernel:  i915_gem_shrinker_scan+0x9d/0xb0 [i915]
Apr 14 09:39:15 hobbes kernel:  shrink_slab.part.14+0x1f1/0x450
Apr 14 09:39:15 hobbes kernel:  shrink_node+0x230/0x320
Apr 14 09:39:15 hobbes kernel:  kswapd+0x31c/0x730
Apr 14 09:39:15 hobbes kernel:  kthread+0x101/0x140
Apr 14 09:39:15 hobbes kernel:  ? mem_cgroup_shrink_node+0x1a0/0x1a0
Apr 14 09:39:15 hobbes kernel:  ? kthread_create_on_node+0x60/0x60
Apr 14 09:39:15 hobbes kernel:  ret_from_fork+0x2c/0x40
Apr 14 09:39:15 hobbes kernel: Code: 8d 54 11 c0 48 8d 04 c7 4c 89 c7 48 d3 e7
48 89 e5 45 85 d2 78 4a 45 89 d3 41 c1 eb 06 44 89 d9 4c 8d 4c c8 08 4
Apr 14 09:39:15 hobbes kernel: RIP: bitmap_clear+0x3e/0x80 RSP:
ffffc90000fffa28
Apr 14 09:39:15 hobbes kernel: CR2: 0000000171426008
Apr 14 09:39:15 hobbes kernel: ---[ end trace 699cb04ab4a14163 ]---
```

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