promote: omni-audio native attention delta onto v0.24.0 - #2
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…e branch Carry the native-attention-relevant fixes from the archived compile/cudagraph feature branch (archive/omni-audio-cudagraph-full) onto the slim native-attention-only lineage: - reject the unsupported FLASHINFER backend for the audio encoder (review W1-1) - drop dead attrs in Qwen2_5OmniAudioAttention (W3-1) and the tuple return in the encoder layer forward (W3-5); use the positional-embedding module forward instead of indexing its private buffer (W3-4) - zero the packed QKV bias at construction (HF k_proj has bias=False) and adopt the AutoWeightsLoader + WeightsMapper orig_to_new_stacked idiom from vllm-project#44589, mirroring Qwen3OmniMoeAudioEncoder - adopt the final audio-tower processing test (FLASH_ATTN/TORCH_SDPA parametrization) and the qwen2_5_omni_audio HF-parity generation entry
…model runner The V2 GPU model runner executes multimodal encoders eagerly and never builds an EncoderCudaGraphManager, so cudagraph_mm_encoder=True was silently ignored there (no error, no warning, no acceleration). Register it in _get_v2_model_runner_unsupported_features so the standard V1 fallback warning fires (or a hard error under a forced VLLM_USE_V2_MODEL_RUNNER=1).
…tion The loader test asserted the old zero-at-load contract (sentinel-fill the packed bias, expect load_weights to zero the K slot). With the K-bias zeroing moved to Qwen2_5OmniAudioAttention.__init__ and load_weights delegating to AutoWeightsLoader, the contract is: the K slot is zero at construction and is never written during load (HF provides no k_proj bias). Assert both.
The AutoWeightsLoader + WeightsMapper(orig_to_new_stacked=...) idiom requires the vllm-project#44589 infrastructure, which landed after the v0.24.0 release — on this base the mapper kwarg is a TypeError at class-definition time. Restore the manual stacked-params loader in the W2-3-hardened form proven on the v0.23 lineage (skip non-parameter checkpoint keys via params_dict.get; record only weights actually loaded). The K-bias zero-at-construction from the hygiene port is kept; the loader re-zeroes defensively for reload paths.
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Purpose
Promotes PATCHES.md rows #1 (native packed audio attention), #2 (audio-tower hygiene), vllm-project#3 (MRV2 fail-loud guard) onto vLLM v0.24.0. Reason: first prod lane cut on the current upstream release; supersedes the legacy v0.23 full-feature branch (compile/cudagraph deprecated to eager per benchmarks).
Adaptation notes (delta vs the dev lane)
load_weightsmethods vllm-project/vllm#44589 infra, which landed after v0.24.0 (mapper kwarg would TypeError at class-definition time). K-bias zero-at-construction kept; loader re-zeroes defensively.Validation gate (L40S, editable install via VLLM_USE_PRECOMPILED + pinned v0.24.0 release wheel = the exact image path; tip 8342306)
Review: diff walked through interactively 2026-07-08 (compare v0.24.0...promote/v0.24.0); the config/vllm.py guard questioned and approved ("let it be").