[igt-dev] ✗ Fi.CI.BAT: failure for tests/gem_shrink: Exercise OOM and other routes to shrinking in reasonable time (rev2)

[Chris Wilson]

Quoting Chris Wilson (2019-01-07 20:53:48)
> Quoting Tvrtko Ursulin (2019-01-07 18:25:34)
> > 
> > On 07/01/2019 18:00, Patchwork wrote:
> > > 
> > >    * {igt at gem_shrink@reclaims-and-oom-both-basic}:
> > >      - fi-ivb-3520m:       NOTRUN -> DMESG-WARN
> > 
> > Yay, test found something! :)
> 
> Test requirement not met in function __real_main745, file ../tests/i915/gem_shrink.c:827:
> Test requirement: has_sysrq_trigger()

Fwiw, with whatever changed in 5.0, the oom_trigger is not required for
the lockdep warning.

(I'm not sure if the oom_trigger adds anything useful; the nasty oom
conditions will be from inside page_alloc after direct reclaim fails.
Indeed, I don't think oom itself does anything that would trigger the
mmu_notifier? Do you know of a path?)
-Chris