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Date: Wed, 15 Apr 2020 07:40:41 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: xinhui pan <xinhui.pan@....com>, Christian König <christian.koenig@....com>, Sasha Levin <sashal@...nel.org>, dri-devel@...ts.freedesktop.org, linux-media@...r.kernel.org, linaro-mm-sig@...ts.linaro.org Subject: [PATCH AUTOSEL 5.5 001/106] drm/ttm: flush the fence on the bo after we individualize the reservation object From: xinhui pan <xinhui.pan@....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@....com> Reviewed-by: Christian König <christian.koenig@....com> Link: https://patchwork.freedesktop.org/series/72339/ Signed-off-by: Christian König <christian.koenig@....com> Signed-off-by: Sasha Levin <sashal@...nel.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); -- 2.20.1
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