[Bug 68462] New: [SNB]IGT/gem_evict_alignment system hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=68462

          Priority: high
            Bug ID: 68462
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [SNB]IGT/gem_evict_alignment  system hang
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 84495
  --> https://bugs.freedesktop.org/attachment.cgi?id=84495&action=edit
dmesg

System Environment:
--------------------------
Platform:  Sandybridge/Ivybridge/Haswell
Kernel:
(drm-intel-next-nightly)38a7ce25365492682031e0b68d249684f79de3d4(26b32d7
884020bf)

Bug detailed description:
-----------------------------
It causes  system on sandybridge with -nightly, -queued,-fixes kernel.
It's a new case. It fails on haswell,ivybridge, ironlake.
gem_evict_everything also has this issue.

no output info on sandybridge.

Call trace:
[  573.747870]  [<f81841c4>] ? i915_gem_free_object+0x57/0x171 [i915]
[  573.747971]  [<f809cc27>] ? drm_gem_object_free+0x1a/0x1b [drm]
[  573.748003]  [<f809ce2c>] ?
drm_gem_object_handle_unreference_unlocked+0x8a/0xbc [drm]
[  573.748044]  [<f809cf17>] ? drm_gem_handle_delete+0x86/0x8e [drm]
[  573.748076]  [<f809cfcb>] ? drm_gem_dumb_destroy+0x7/0x7 [drm]
[  573.748107]  [<f809ba6d>] ? drm_ioctl+0x222/0x308 [drm]
[  573.748136]  [<f809cfcb>] ? drm_gem_dumb_destroy+0x7/0x7 [drm]
[  573.748168]  [<c02a5cd5>] ? page_add_new_anon_rmap+0x2f/0x8b
[  573.748199]  [<f809b84b>] ? drm_copy_field+0x47/0x47 [drm]
[  573.749638]  [<c02c051c>] ? vfs_ioctl+0x18/0x21
[  573.751069]  [<c02c0ee8>] ? do_vfs_ioctl+0x3ec/0x42c
[  573.752490]  [<c02b1744>] ? kmem_cache_free+0xb7/0xbe
[  573.753904]  [<c02b1744>] ? kmem_cache_free+0xb7/0xbe
[  573.755297]  [<c02c3520>] ? d_kill+0xb3/0xb9
[  573.756673]  [<c02c3520>] ? d_kill+0xb3/0xb9
[  573.758047]  [<c02c3520>] ? d_kill+0xb3/0xb9
[  573.759413]  [<c02c0f71>] ? SyS_ioctl+0x49/0x74
[  573.760783]  [<c08796fa>] ? sysenter_do_call+0x12/0x22
[  573.762157] Code: f0 e8 60 e6 ff ff 8d 73 68 39 73 68 74 0f ba 60 0a 00 00
b8 cd ba 1c f8 e8 4f 79 0a c8 39 73 68 75 28 8b 43 78 8d 53 74 8b 4b 74 <89> 41
04 89 08 8b 87 70 13 00 00 89 97 70 13 00 00 81 c7 6c 13
[  573.765297] EIP: [<f8183531>] i915_vma_unbind+0x118/0x144 [i915] SS:ESP
0068:f4cdfe20
[  573.766798] CR2: 0000000000100104
[  573.768290] ---[ end trace 4b1741a2c9657822 ]---

output on ironlake:
Test assertion failure function copy, file gem_evict_alignment.c:117:
Failed assertion: ret == error

Reproduce steps:
----------------------------
1. ./gem_evict_alignment

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