From 1bbcf69e42fe7fd49b6f4339c970729d0e343753 Mon Sep 17 00:00:00 2001 From: xinhui pan Date: Wed, 15 Jan 2020 14:07:45 +0800 Subject: [PATCH] drm/ttm: flush the fence on the bo after we individualize the reservation object MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit As we move the ttm_bo_individualize_resv() upwards, we need flush the copied fence too. Otherwise the driver keeps waiting for fence. run&Kill kfdtest, then perf top. 25.53% [ttm] [k] ttm_bo_delayed_delete 24.29% [kernel] [k] dma_resv_test_signaled_rcu 19.72% [kernel] [k] ww_mutex_lock Fix: 378e2d5b("drm/ttm: fix ttm_bo_cleanup_refs_or_queue once more") Signed-off-by: xinhui pan Reviewed-by: Christian König Link: https://patchwork.freedesktop.org/series/72339/ Signed-off-by: Christian König --- drivers/gpu/drm/ttm/ttm_bo.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index 06f6d650827f..1fbc36f05d89 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -491,8 +491,10 @@ static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo) dma_resv_unlock(bo->base.resv); } - if (bo->base.resv != &bo->base._resv) + if (bo->base.resv != &bo->base._resv) { + ttm_bo_flush_all_fences(bo); dma_resv_unlock(&bo->base._resv); + } error: kref_get(&bo->list_kref);