[Intel-gfx] [PATCH 07/66] drm/i915: Keep the most recently used active-fence upon discard

[Thomas Hellström (Intel)]

On 2020-07-15 13:50, Chris Wilson wrote:
> 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 at chris-wilson.co.uk>
> ---
>   drivers/gpu/drm/i915/i915_active.c | 27 ++++++++++++++++++++-------
>   drivers/gpu/drm/i915/i915_active.h |  4 ----
>   2 files changed, 20 insertions(+), 11 deletions(-)

Lgtm. Reviewed-by: Thomas Hellström <thomas.hellstrom at intel.com>