Quoting Christian König (2019-08-21 13:31:42)
Add a new dma_resv_prune_fences() function to improve memory management.
Signed-off-by: Christian König christian.koenig@amd.com
drivers/dma-buf/dma-resv.c | 37 ++++++++++++++++++++++ drivers/gpu/drm/i915/gem/i915_gem_wait.c | 3 +- drivers/gpu/drm/i915/i915_gem_batch_pool.c | 2 +- drivers/gpu/drm/i915/i915_vma.c | 3 +- drivers/gpu/drm/ttm/ttm_bo.c | 2 +- include/linux/dma-resv.h | 1 + 6 files changed, 42 insertions(+), 6 deletions(-)
diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c index 42a8f3f11681..24adc32d36d4 100644 --- a/drivers/dma-buf/dma-resv.c +++ b/drivers/dma-buf/dma-resv.c @@ -301,6 +301,43 @@ void dma_resv_add_excl_fence(struct dma_resv *obj, struct dma_fence *fence) } EXPORT_SYMBOL(dma_resv_add_excl_fence); +/**
- dma_resv_prune_fences - prune signaled fences from the resv object
- @obj: the reservation object to prune
- Prune all signaled fences from the reservation object.
- */
+void dma_resv_prune_fences(struct dma_resv *obj) +{
struct dma_resv_list *list;struct dma_fence *fence;unsigned int i;dma_resv_assert_held(obj);fence = dma_resv_get_excl(obj);if (dma_fence_is_signaled(fence)) {RCU_INIT_POINTER(obj->fence_excl, NULL);dma_fence_put(fence);}list = dma_resv_get_list(obj);if (!list)return;for (i = 0; i < list->shared_count; ++i) {fence = rcu_dereference_protected(list->shared[i],dma_resv_held(obj));if (!dma_fence_is_signaled(fence))continue;RCU_INIT_POINTER(list->shared[i], dma_fence_get_stub());dma_fence_put(fence);
Not worth reusing the compaction logic from add_shared_fence? -Chris