[Bug 89859] [BSW]igt/gem_evict_everything/mlocked-hang causes oom killer

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89859

--- Comment #2 from ye.tian <yex.tian at intel.com> ---
This issue also exists with the nightly kernel on SNB, It does not exist the
fixes kernel. 
There is not "Call Trace" on fixes kernel, but there is "GPU HANG" on both
kernels.

output:
-----------------
[  968.835330] [drm] stuck on render ring
[  968.835838] [drm] GPU HANG: ecode 6:0:0xe77fffff, in gem_evict_every [4614],
reason:
[  968.855694] drm/i915: Resetting chip after gpu hang
[  972.607154] gem_evict_everything: exiting, ret=0

output:
----------------
./gem_evict_everything --run-subtest mlocked-hang
IGT-Version: 1.10-g992f9f6 (x86_64) (Linux:
4.0.0-rc6_drm-intel-nightly_a8ae89_20150402+ x86_64)
child 0 died with signal 9, Killed
Subtest mlocked-hang failed.
**** DEBUG ****
Checking 1536 surfaces of size 1048576 bytes (total 1611399168) against RAM
Test requirement passed: !(total <= required)
Test requirement passed: !igt_run_in_simulation()
Test requirement passed: pin > sz
Pinning [1431, 2967] MiB
Test requirement passed: locked
****  END  ****
Subtest mlocked-hang: FAIL (54.330s)

output:
---------------------
./gem_evict_everything --run-subtest mlocked-hang
IGT-Version: 1.10-g992f9f6 (x86_64) (Linux:
4.0.0-rc6_drm-intel-fixes_ee73c6_20150331+ x86_64)
Subtest mlocked-hang: SUCCESS (825.940s)

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