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[Bugfix] Fix int32 overflow in DeepGEMM SiLU/mul FP8 Triton kernel #42201

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Merged
yewentao256 merged 3 commits into from
May 11, 2026
+3 −3
Merged

[Bugfix] Fix int32 overflow in DeepGEMM SiLU/mul FP8 Triton kernel #42201

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c4ad401
fix(fp8): upcast m_offset/n_offset to tl.int64 in _silu_mul_per_token…
Flink-ddd May 10, 2026
4030b06
Update vllm/model_executor/layers/quantization/utils/fp8_utils.py
Flink-ddd May 10, 2026
d0729a2
Update vllm/model_executor/layers/quantization/utils/fp8_utils.py
Flink-ddd May 10, 2026
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6 changes: 3 additions & 3 deletions vllm/model_executor/layers/quantization/utils/fp8_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -171,7 +171,7 @@ def _silu_mul_quant_fp8_packed_kernel(

pid_pack = tl.program_id(0)
pid_m = tl.program_id(1)
m_offset = pid_m * BLOCK_M
m_offset = pid_m.to(tl.int64) * BLOCK_M

if m_offset >= M:
return
Expand Down Expand Up @@ -321,8 +321,8 @@ def _silu_mul_per_token_group_quant_fp8_colmajor(
pid_n = tl.program_id(1)
N_2 = N // 2

m_offset = pid_m * BLOCK_M
n_offset = pid_n * BLOCK_N
m_offset = pid_m.to(tl.int64) * BLOCK_M
n_offset = pid_n.to(tl.int64) * BLOCK_N
if m_offset >= M:
return

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