drm/i915: Forcibly flush unwanted requests in drop-caches

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Add a mode to debugfs/drop-caches to flush unwanted requests off the GPU
(by wedging the device and resetting). This is very useful if a test
terminated leaving a long queue of hanging batches that would ordinarily
require a round trip through hangcheck for each.

It reduces the inter-test operation to just a write into drop-caches to
reset driver/GPU state between tests.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180903083337.13134-5-chris@chris-wilson.co.uk

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Chris Wilson 2018-09-03 09:33:37 +01:00

parent e0ff7a7cdd

commit 6b048706f4

1 changed files with 36 additions and 16 deletions

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drivers/gpu/drm/i915/i915_debugfs.c

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