drm/i915: Only defer freeing of fence callback when also using the timer

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Without an accompanying timer (for internal fences), we can free the
fence callback immediately as we do not need to employ the RCU barrier
to serialise with the timer. By avoiding the RCU delay, we can avoid the
extra mempressure under heavy inter-engine request utilisation.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180115090643.26696-1-chris@chris-wilson.co.uk

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Chris Wilson 2018-01-15 09:06:42 +00:00

parent c9ef291a7e

commit c32164b1f6

1 changed files with 10 additions and 3 deletions

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drivers/gpu/drm/i915/i915_sw_fence.c

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