drm/i915: Keep the most recently used active-fence upon discard

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Whenever an i915_active idles, we prune its tree of old fence slots to
prevent a gradual leak should it be used to track many, many timelines.
The downside is that we then have to frequently reallocate the rbtree.
A compromise is that we keep the most recently used fence slot, and
reuse that for the next active reference as that is the most likely
timeline to be reused.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Thomas Hellström <thomas.hellstrom@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200731085015.32368-4-chris@chris-wilson.co.uk
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

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Chris Wilson 2020-07-31 09:50:12 +01:00 • committed by Joonas Lahtinen

parent 5d9341370f

commit 99a7f4dae7

2 changed files with 20 additions and 11 deletions

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27

drivers/gpu/drm/i915/i915_active.c

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4

drivers/gpu/drm/i915/i915_active.h

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