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drm/ttm: flush the fence on the bo after we individualize the reservation object

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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>
This commit is contained in:
xinhui pan 2020-01-15 14:07:45 +08:00 committed by Christian König
parent b37ea8bff7
commit 1bbcf69e42
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/ttm/ttm_bo.c
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@ -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);