[Intel-gfx] [CI] drm/i915: Treat a framebuffer reference as an active reference whilst shrinking

[Chris Wilson]

Treat a framebuffer reference with the same priority as an active
reference whilst shrinking. Framebuffers are likely to be reused and
typically cost more to migrate to and from GPU memory (on LLC
architectures we need to clflush), so defer the temptation to purge them
during a kswapd run until we have run out of cheap buffers.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Reviewed-by: John Harrison <john.c.harrison at intel.com>
---
 drivers/gpu/drm/i915/i915_gem_shrinker.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_shrinker.c b/drivers/gpu/drm/i915/i915_gem_shrinker.c
index 1c237d02f30b..de25b6e0a101 100644
--- a/drivers/gpu/drm/i915/i915_gem_shrinker.c
+++ b/drivers/gpu/drm/i915/i915_gem_shrinker.c
@@ -182,8 +182,9 @@ i915_gem_shrink(struct drm_i915_private *dev_priv,
 			    !is_vmalloc_addr(obj->mapping))
 				continue;
 
-			if ((flags & I915_SHRINK_ACTIVE) == 0 &&
-			    i915_gem_object_is_active(obj))
+			if (!(flags & I915_SHRINK_ACTIVE) &&
+			    (i915_gem_object_is_active(obj) ||
+			     obj->framebuffer_references))
 				continue;
 
 			if (!can_release_pages(obj))
-- 
2.9.3