[Bug 87729] [BSW PPGTT Bisected]igt/gem_ctx_thrash causes OOM killer

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87729

--- Comment #8 from lu hua <huax.lu at intel.com> ---
(In reply to Michel Thierry from comment #7)
> This test (and gem_close_race) should fail if i915.enable_ppgtt=2.
> 
> Deffered page table allocation is still under review and hasn't been merged.
> 
> If it's failing with enable_ppgtt=1, then it's something else.

Add i915.enable_ppgtt=1, it's skip.
IGT-Version: 1.9-g7848d21 (x86_64) (Linux:
3.19.0-rc6_drm-intel-nightly_70438b_20150128+ x86_64)
Creating 49152 contexts (assuming of size 65536)
Creating 98304 surfaces (of size 45056)
Test requirement not met in function intel_require_memory, file intel_os.c:244:
Test requirement: !(total <= required)
Estimated that we need 4479516672 bytes for the test, but only have 3767533568
bytes available (RAM)
Subtest processes: SKIP (1.106s)

add i915.enable_ppgtt=2, it still fails.

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