fix: add zero init for KV tiled copy #1029
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yzh119
approved these changes
Apr 22, 2025
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This PR fixes the out-of-bound K/V value loading in the FA3
sparse_mainloop.cuh, which may cause a nan value forBatchPrefillWithPagedKVCacheSM90RunandBlockSparseAttentionWrapper. The accumulation of out-of-bound V and S causes the nan value.This may solve the issue #1018.