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A high-throughput and memory-efficient inference and serving engine for LLMs

Mirrored from https://github.com/tduncan-lum/Nvidia-Optimization-Stack---VLLM.git

Synced Nov 8, 12:30 UTC

[Bugfix] Fix mamba cache dtype for Qwen3.5 (#34200)

Signed-off-by: Roger Wang <hey@rogerw.io>

Roger Wang committed Feb 10, 2026 at 13:12 UTC 9615575afc0d9a7d5fe98b65ac2a7150b068472e
1 file changed +2 -1
vllm/model_executor/models/qwen3_5.py
+2 -1
@@ -870,8 +870,9 @@ class Qwen3_5ForConditionalGeneration(Qwen3VLForConditionalGeneration, IsHybrid)
870 cls,
871 vllm_config: "VllmConfig",
872 ) -> tuple[torch.dtype, torch.dtype]:
873 + mamba_ssm_dtype = vllm_config.model_config.hf_text_config.mamba_ssm_dtype
874 return MambaStateDtypeCalculator.gated_delta_net_state_dtype(
874 - vllm_config.model_config.dtype, vllm_config.cache_config.mamba_cache_dtype
875 + vllm_config.model_config.dtype, mamba_ssm_dtype
876 )
877
878 @classmethod