drm/i915: Use fault-injection to force the shrinker to run in live GTT tests

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It is possible whilst allocating the page-directory tree for a ppgtt
bind that the shrinker may run and reap unused parts of the tree. If the
shrinker happens to remove a chunk of the tree that the
allocate_va_range has already processed, we may then try to insert into
the dangling tree. This test uses the fault-injection framework to force
the shrinker to be invoked before we allocate new pages, i.e. new chunks
of the PD tree.

References: https://bugs.freedesktop.org/show_bug.cgi?id=99295
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>

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This commit is contained in:

Chris Wilson 2017-02-13 17:15:44 +00:00

parent 4a6f13fce1

commit aae4a3d811

5 changed files with 109 additions and 0 deletions

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1

drivers/gpu/drm/i915/Kconfig.debug

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2

drivers/gpu/drm/i915/i915_drv.h

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6

drivers/gpu/drm/i915/i915_gem_gtt.c

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2

drivers/gpu/drm/i915/i915_selftest.h

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98

drivers/gpu/drm/i915/selftests/i915_gem_gtt.c

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