[PATCH] drm/ttm: Use init_on_free to early release TTM BOs

[Rajneesh Bhardwaj]

Early release TTM BOs when the kernel default setting is init_on_free to
wipe out and reinitialize system memory chunks. This could potentially
optimize performance when an application does a lot of malloc/free style
allocations with unified system memory.

Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj at amd.com>
---
 drivers/gpu/drm/ttm/ttm_bo.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 326a3d13a829..bd2e7e4f497a 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -347,6 +347,7 @@ static void ttm_bo_release(struct kref *kref)
 
 		if (!dma_resv_test_signaled(bo->base.resv,
 					    DMA_RESV_USAGE_BOOKKEEP) ||
+		    (want_init_on_free() && (bo->ttm != NULL)) ||
 		    !dma_resv_trylock(bo->base.resv)) {
 			/* The BO is not idle, resurrect it for delayed destroy */
 			ttm_bo_flush_all_fences(bo);
-- 
2.17.1