half_free_vram    528 drivers/gpu/drm/radeon/radeon_object.c 	u64 half_free_vram = vram_usage >= half_vram ? 0 : half_vram - vram_usage;
half_free_vram    529 drivers/gpu/drm/radeon/radeon_object.c 	u64 bytes_moved_threshold = half_free_vram >> 1;