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[AMD][DeepSeek V4] Set SGLANG_OPT_FLASHMLA_SPARSE_PREFILL to false on hip code path #30237

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Merged
HaiShaw merged 1 commit into from
Jul 6, 2026
Merged

[AMD][DeepSeek V4] Set SGLANG_OPT_FLASHMLA_SPARSE_PREFILL to false on hip code path #30237

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4 changes: 2 additions & 2 deletions python/sglang/srt/arg_groups/deepseek_v4_hook.py
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Original file line number Diff line number Diff line change
Expand Up @@ -20,8 +20,8 @@ def apply_deepseek_v4_defaults(server_args: ServerArgs, model_arch: str) -> None
# currently returns incorrect output for DeepSeek-V4-Flash on ROCm/HIP
# (MI355X), which breaks the disaggregation nightly. Keep the previous
# (dense prefill) behavior on ROCm until the sparse kernel is validated
# there; an explicit env var still overrides this.
if is_hip() and not envs.SGLANG_OPT_FLASHMLA_SPARSE_PREFILL.is_set():
# there;
if is_hip():
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logger.warning(
"Disabling SGLANG_OPT_FLASHMLA_SPARSE_PREFILL by default on ROCm/HIP "
f"for {model_arch}; set it explicitly to override."
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