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[https://nvbugs/6674826][fix] Drop overlap hint from KV cache page-index upload #18694

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Merged
lowsfer merged 1 commit into from
Sep 4, 2026
+3 −2
Merged

[https://nvbugs/6674826][fix] Drop overlap hint from KV cache page-index upload #18694

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4 changes: 3 additions & 1 deletion cpp/tensorrt_llm/batch_manager/kv_cache_manager_v2/coldPageCopy.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -111,7 +111,9 @@ void copyPageIndicesToDevice(CUdeviceptr dst, PageIndexPair const* src, size_t n
attributes.srcAccessOrder = CU_MEMCPY_SRC_ACCESS_ORDER_DURING_API_CALL;
attributes.srcLocHint.type = CU_MEM_LOCATION_TYPE_HOST;
attributes.dstLocHint.type = CU_MEM_LOCATION_TYPE_DEVICE;
attributes.flags = CU_MEMCPY_FLAG_PREFER_OVERLAP_WITH_COMPUTE;
// Do not set CU_MEMCPY_FLAG_PREFER_OVERLAP_WITH_COMPUTE: it breaks the
// CU_MEMCPY_SRC_ACCESS_ORDER_DURING_API_CALL semantics above (driver bug nvbugs 6718200).
attributes.flags = 0;
size_t firstCopy = 0;
#if CUDA_VERSION < 13000
size_t failIdx = std::numeric_limits<size_t>::max();
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1 change: 0 additions & 1 deletion tests/integration/test_lists/waives.txt
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Expand Up @@ -57,7 +57,6 @@ accuracy/test_llm_api_pytorch.py::TestQwen3_8B::test_w4a8_mxfp4[fp8-latency] SKI
accuracy/test_llm_api_pytorch_multimodal.py::TestMistralLarge3_675B::test_nvfp4_4gpus[latency_moe_trtllm] SKIP (https://nvbugs/6665906)
cpp/test_multi_gpu.py::test_cache_transceiver[8proc-mooncake_kvcache-90] SKIP (https://nvbugs/5838199)
cpp/test_multi_gpu.py::test_cache_transceiver[8proc-ucx_kvcache-90] SKIP (https://nvbugs/5838199)
cpp/test_unit_tests.py::test_unit_tests[batch_manager-80] SKIP (https://nvbugs/6674826)
disaggregated/test_auto_scaling.py::test_disagg_server_restart[etcd-round_robin] SKIP (https://nvbugs/6611817)
disaggregated/test_disaggregated.py::test_disaggregated_cancel_large_context_requests[DeepSeek-V3-Lite-bf16] SKIP (https://nvbugs/6105768)
disaggregated/test_disaggregated.py::test_disaggregated_ctxpp4_genpp4[TinyLlama-1.1B-Chat-v1.0] SKIP (https://nvbugs/6428069)
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