[Bug 94001] [APL/KBL/BSW/BDW/SKL/IVB/BYT] igt/gem_exec_reloc subtests fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94001

--- Comment #45 from Jari Tahvanainen <jari.tahvanainen at intel.com> ---
Tested-by for https://patchwork.freedesktop.org/series/21377 on my dev-SKL
(i5-6600k) by taking all the gem_exec_reloc cases to testlist (151 tests).
Executing those as a full set through piglit was not successful due to
out-of-memory conditions at the end of the testlist with some (varying) gtt-xx
subcases causing "Command terminated by signal 9". cpu-xx did not signal any
problems.
drm-tip: 2017y-03m-17d-08h-03m-19s without patch series produced:
[151/151] skip: 2, pass: 120, fail: 29
with patch series applied one gets:
[121/151] pass: 121 |
running: igt/gem_exec_reloc/gtt-28 - "Command terminated by signal 9"
Taking rest as new testlist 
[30/30] skip: 2, pass: 30, dmesg-warn: 1
having 
dmesg-warn: igt/gem_exec_reloc/readonly-32
skip: igt/gem_exec_reloc/active-bsd1
skip: igt/gem_exec_reloc/active-bsd2

When running tests gtt-xx tests individually then result for all is pass.
$ sudo ./gem_exec_reloc --run-subtest cpu-31
IGT-Version: 1.17-g3e3c1cd (x86_64) (Linux: 4.11.0-rc2-ezbench_cb106cd+ x86_64)
Subtest cpu-31: SUCCESS (3,760s)
$ sudo ./gem_exec_reloc --run-subtest gtt-31
IGT-Version: 1.17-g3e3c1cd (x86_64) (Linux: 4.11.0-rc2-ezbench_cb106cd+ x86_64)
Subtest gtt-31: SUCCESS (25,313s)
$ sudo ./gem_exec_reloc --run-subtest gtt-30
IGT-Version: 1.17-g3e3c1cd (x86_64) (Linux: 4.11.0-rc2-ezbench_cb106cd+ x86_64)
Subtest gtt-30: SUCCESS (11,196s)
$ sudo ./gem_exec_reloc --run-subtest gtt-29
IGT-Version: 1.17-g3e3c1cd (x86_64) (Linux: 4.11.0-rc2-ezbench_cb106cd+ x86_64)
Subtest gtt-29: SUCCESS (5,198s)
$ sudo ./gem_exec_reloc --run-subtest gtt-28
IGT-Version: 1.17-g3e3c1cd (x86_64) (Linux: 4.11.0-rc2-ezbench_cb106cd+ x86_64)
Subtest gtt-28: SUCCESS (2,543s)

After getting the latest tested-by data from all the platform we might want to
close this and have new bugs (or identify already existing ones) for
out-of-memory condition (kernel might have problems on memory management) and
dmesg-warn on igt/gem_exec_reloc/readonly-32 due to "hung task notifier since
we don't inject any cond_resched()"

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