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[Bugfix] Fix missing seq_start_loc in xformers prefill metadata (#12464)

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Signed-off-by: Isotr0py <2037008807@qq.com>
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Isotr0py 2025-01-27 15:25:30 +08:00 committed by GitHub
parent 5204ff5c3f
commit 372bf0890b
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vllm/attention/backends/xformers.py
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@ -199,6 +199,8 @@ class XFormersMetadata(AttentionMetadata, PagedAttentionMetadata):
# Compute some attn_metadata fields which default to None
query_start_loc = (None if self.query_start_loc is None else
self.query_start_loc[:self.num_prefills + 1])
seq_start_loc = (None if self.seq_start_loc is None else
self.seq_start_loc[:self.num_prefills + 1])
slot_mapping = (None if self.slot_mapping is None else
self.slot_mapping[:self.num_prefill_tokens])
seq_lens = (None if self.seq_lens is None else
@ -225,6 +227,7 @@ class XFormersMetadata(AttentionMetadata, PagedAttentionMetadata):
max_prefill_seq_len=self.max_prefill_seq_len,
max_decode_seq_len=0,
query_start_loc=query_start_loc,
seq_start_loc=seq_start_loc,
context_lens_tensor=context_lens_tensor,
block_tables=block_tables,
use_cuda_graph=False,