[Bug 72740] [SNB/IVB/HSW/BYT/BDW]igt/gem_reset_stats causes *ERROR* render ring hung inside bo (0x592000 ctx 2) at 0x5928a4

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72740

--- Comment #5 from lu hua <huax.lu at intel.com> ---
Created attachment 91142
  --> https://bugs.freedesktop.org/attachment.cgi?id=91142&action=edit
dmesg on nightly e9c4f4

Test on latest nightly kernel, It doesn't exit.
Call Trace:
[   59.916047]  [<f81c745d>] ? i915_reg_read_ioctl+0x49/0x49 [i915]
[   59.916079]  [<f80847ce>] ? drm_ioctl+0x222/0x30c [drm]
[   59.916110]  [<f81c745d>] ? i915_reg_read_ioctl+0x49/0x49 [i915]
[   59.916140]  [<c02a7cbe>] ? page_add_new_anon_rmap+0x44/0x9e
[   59.916170]  [<f80845ac>] ? drm_core_reclaim_buffers+0x52/0x52 [drm]
[   59.916201]  [<c02c39c9>] ? do_vfs_ioctl+0x3f6/0x43d
[   59.916226]  [<c02b3ce9>] ? kmem_cache_free+0xb7/0xbe
[   59.916250]  [<c02b3ce9>] ? kmem_cache_free+0xb7/0xbe
[   59.916275]  [<c02c6363>] ? dentry_kill+0x14d/0x162
[   59.916299]  [<c02c6363>] ? dentry_kill+0x14d/0x162
[   59.916322]  [<c02c6363>] ? dentry_kill+0x14d/0x162
[   59.916345]  [<c02c6653>] ? dput+0xc9/0xd0
[   59.916366]  [<c02b8200>] ? __fput+0x172/0x191
[   59.916388]  [<c02c3a59>] ? SyS_ioctl+0x49/0x74
[   59.916411]  [<c089a13a>] ? sysenter_do_call+0x12/0x22
[   59.916435] Code: 00 00 e8 f0 93 06 c8 84 c0 74 19 8b 87 e0 19 00 00 bf 02
00 00 00 25 ff ff ff 7f 40 99 f7 ff 89 43 08 eb 07 c7 43 08 00 00 00 00 <8b> 45
1c 89 43 0c 8b 45 18 89 43 10 8b 04 24 e8 3e d2 6c c8 eb
[   59.916657] EIP: [<f81c74fc>] i915_get_reset_stats_ioctl+0x9f/0xc2 [i915]
SS:ESP 0068:f43ebe60
[   59.916706] CR2: 000000000000001c
[   59.916731] ---[ end trace 4dce54b5a276aded ]---

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