From: xinhui pan xinhui.pan@amd.com
[ Upstream commit 1bbcf69e42fe7fd49b6f4339c970729d0e343753 ]
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 xinhui.pan@amd.com Reviewed-by: Christian König christian.koenig@amd.com Link: https://patchwork.freedesktop.org/series/72339/ Signed-off-by: Christian König christian.koenig@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 8d91b0428af1b..1494aebb81284 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -499,8 +499,10 @@ 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);