[Bug 90045] [BDW/BSW/SKL]igt/gem_exec_big fails and causes [drm:i915_hangcheck_elapsed [i915]] *ERROR* Hangcheck timer elapsed... render ring idle

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90045

--- Comment #10 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to Rami from comment #8)
> Actual results:
> ./gem_exec_big
> IGT-Version: 1.12-ge42936d (x86_64) (Linux: 4.4.0-rc1-nightly+ x86_64)
> Test assertion failure function gem_execbuf, file ioctl_wrappers.c:445:
> Failed assertion: result == 0
> Last errno: 28, No space left on device
> Stack trace:
>   #0 [__igt_fail_assert+0x101]
>   #1 [__gem_mmap__gtt+0x0]
>   #2 [exec1+0x11c]
>   #3 [main+0x156]
>   #4 [__libc_start_main+0xf0]
>   #5 [_start+0x29]
>   #6 [<unknown>+0x29]
> Test gem_exec_big failed.
> **** DEBUG ****

> batch_size 2147483648, reloc_ofs 4096
> Test assertion failure function gem_execbuf, file ioctl_wrappers.c:445:
> Failed assertion: result == 0
> Last errno: 28, No space left on device
> ****  END  ****
> FAIL (55.860s)

That's the result the test is intended to produce (the expected failure
condition for the current kernel), but that should can only occur on non-llc
devices like pnv, byt and bsw. bdw/skl should be different bugs, and this is
not the same bug as the original (but 88392 reborn).

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