[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 #11 from Ramchandra Apte <maniandram01 at gmail.com> ---
Still happening with the latest
"linux-image-3.19.0-994-generic_3.19.0-994.201502100205_amd64.deb" Ubuntu
drm-nightly package on
http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-nightly/ .

Doing empirical testing with the game "Team Fortress 2" yielded a OOM kill
after about 10 minutes of running the game.

However, gem_ctx_thrash yielded a skip:

ramchandra at ramchandra-LIFEBOOK-AH532:~/Downloads/intel-gpu-tools/tests$ sudo
./gem_ctx_thrash  
IGT-Version: 1.9-gbef692d (x86_64) (Linux: 3.19.0-994-generic x86_64)
Creating 49152 contexts (assuming of size 65536)
Test requirement not met in function intel_require_memory, file intel_os.c:244:
Test requirement: !(total <= required)
Estimated that we need 3246391296 bytes for the test, but only have 432013312
bytes available (RAM + swap)
Subtest processes: SKIP (0.192s)
Creating 49152 contexts (assuming of size 65536)
Test requirement not met in function intel_require_memory, file intel_os.c:244:
Test requirement: !(total <= required)
Estimated that we need 3246391296 bytes for the test, but only have 432013312
bytes available (RAM + swap)
Subtest threads: SKIP (0.132s)

I will soon try with different enable_ppgtt options to see whether that makes
any difference.

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