drm/i915: Allow fence allocations to fail

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If a fence allocation fails in a blocking context, we will sleep on the
fence as a last resort. We can therefore allow ourselves to fail and
sleep on the fence instead of triggering a system-wide oom. This allows
us to throttle malicious clients that are consuming lots of system
resources by capping the amount of memory used by fences.

Testcase: igt/gem_shrink/execbufX
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171212180652.22061-2-chris@chris-wilson.co.uk

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Chris Wilson 2017-12-12 18:06:51 +00:00

parent e30a7581bf

commit 2abe2f8446

4 changed files with 7 additions and 5 deletions

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2

drivers/gpu/drm/i915/i915_gem_clflush.c

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2

drivers/gpu/drm/i915/i915_gem_context.c

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drivers/gpu/drm/i915/i915_gem_request.c

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2

drivers/gpu/drm/i915/i915_gem_request.h

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