[Bug 90008] New: [SKL]Piglit sporadically causes system hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90008

            Bug ID: 90008
           Summary: [SKL]Piglit sporadically causes system hang
           Product: Mesa
           Version: git
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: high
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

System Environment:
--------------------------
Platform: SKL
Libdrm:       
(master)libdrm-2.4.60-31-g6f90b77ea903756c87ae614c093e3d816ebb26fc
Mesa:        (master)50e9fa2ed69cb5f76f66231976ea789c0091a64d
Xserver:(master)xorg-server-1.17.0-72-gf1da6bf5d94911e78d2e27e6accf0c6e3aefb331
Xf86_video_intel:(master)2.99.917-256-gfbefc8f2bd4242c3f01b02e25276340237b34a88
Libva:        (master)062a63932c0f1439aa587aa986bbcfb758ff38f2
Libva_intel_driver:(master)ed03aebc6e702dab65204cc1469eef0da73e2372
Kernel:   (drm-intel-nightly)044307a99b418258ac0d775460d73b20b80277c1

Bug detailed description:
-----------------------------
It sporadically causes system hang. Run full piglit case multiple rounds, It
happens on different case.
Run attached piglit case list, execute the result_list and system hang. then
run list 2, it doesn't cause system hang.

Reproduce steps:
---------------------------- 
1. xinit
2. run attached piglit list.

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