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[Bugfix] change FlashMLA reorder_batch_threshold #27777

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Merged
merged 2 commits into from
Nov 3, 2025
Merged

[Bugfix] change FlashMLA reorder_batch_threshold #27777

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MatthewBonanni Oct 30, 2025
e2f5a03
Merge branch 'main' into fix_flashmla
MatthewBonanni Nov 3, 2025
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2 changes: 1 addition & 1 deletion vllm/v1/attention/backends/mla/flashmla.py
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Expand Up @@ -71,7 +71,7 @@ class FlashMLAMetadata(MLACommonMetadata[FlashMLADecodeMetadata]):
class FlashMLAMetadataBuilder(MLACommonMetadataBuilder[FlashMLAMetadata]):
cudagraph_support: ClassVar[AttentionCGSupport] = AttentionCGSupport.UNIFORM_BATCH
query_len_support: ClassVar[QueryLenSupport] = QueryLenSupport.UNIFORM
reorder_batch_threshold: int = 512 # process small prefills with decode pathway
reorder_batch_threshold: int = 128 # process small prefills with decode pathway
# ^ TODO(matt): tune this

def __init__(
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