[Bug 89937] New: [BSW] System will hang up when running lightsmark performance case

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89937

            Bug ID: 89937
           Summary: [BSW] System will hang up when running lightsmark
                    performance case
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: wendy.wang at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 114916
  --> https://bugs.freedesktop.org/attachment.cgi?id=114916&action=edit
dmesg_lightsmark_case

==System Environment==      
--------------------------
Failed platform: Braswell

Kernel Regression: Yes, but cannot bisect.

Good commit: drm-intel-nightly branch 2015-04-02
a8ae893a17d719d324779cfbacd6eac28356c62f

Bad commit: drm-intel-nightly branch 33cf6eed7cae0ee2d6bb1b4c4d421b94f84fc13

Try to do the bisect on drm-intel-next-queued branch, find from 2015-04-02 to
the latest, all the commit will fail.

After case fail ,check with dmesg will see Call Trace:
Call Trace:
[  171.452136]  [<ffffffffa0098893>] ?
i915_gem_object_move_to_inactive+0xa0/0x1f4 [i915]
[  171.457018]  [<ffffffffa009a5f8>] ? i915_gem_retire_requests_ring+0x96/0x15b
[i915]
[  171.461894]  [<ffffffffa00927f9>] ? i915_gem_execbuffer_reserve+0x25/0x2e3
[i915]
[  171.466819]  [<ffffffffa0093086>] ?
i915_gem_do_execbuffer.isra.12+0x5cf/0xd6d [i915]
[  171.471784]  [<ffffffffa009e53d>] ? i915_gem_pwrite_ioctl+0x75b/0x7e1 [i915]
[  171.476758]  [<ffffffffa009bbd4>] ?
i915_gem_object_set_to_gtt_domain+0xc7/0x158 [i915]
[  171.481741]  [<ffffffff8110949a>] ? __kmalloc+0x65/0x13d
[  171.486751]  [<ffffffffa00947de>] ? i915_gem_execbuffer2+0x16e/0x208 [i915]
[  171.491806]  [<ffffffffa00047d4>] ? drm_ioctl+0x344/0x3b3 [drm]
[  171.496871]  [<ffffffffa0094670>] ? i915_gem_execbuffer+0x339/0x339 [i915]
[  171.501899]  [<ffffffff816d1793>] ? sock_poll+0xf9/0xf9
[  171.506887]  [<ffffffff8105ede9>] ? set_next_entity+0x32/0x55
[  171.511872]  [<ffffffff8111dab6>] ? do_vfs_ioctl+0x360/0x424
[  171.516857]  [<ffffffff81124dee>] ? __fget_light+0x12/0x54
[  171.521837]  [<ffffffff8111dbc3>] ? SyS_ioctl+0x49/0x7a
[  171.526773]  [<ffffffff8179aff2>] ? system_call_fastpath+0x12/0x17
[  171.531725] Code: de 48 89 ef e8 7b 30 00 00 5a 89 de 4c 89 e7 5b 5d 41 5c
41 5d e9 56 f7 ff ff 41 55 41 89 f5 41 54 55 53 48 89 fb 51 48 8b 6f 08 <8b> 45
60 4c 8b 65 28 ff c8 75 1a 48 c7 c2 63 50 12 a0 be cd 00 
[  171.537233] RIP  [<ffffffffa00d9912>] intel_fb_obj_flush+0x11/0x94 [i915]
[  171.542549]  RSP <ffff88007484fbb8>
[  171.588159] ---[ end trace f1bbb3a340d40ca4 ]---


Reproduce Steps:
1. cd
/usr/local/games/OpenGL/lightsmark-1.2.0/Lightsmark2008.2.0/bin/pc-linux64
2. vblank_mode=0 ./backend silent 1920x1080

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