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[UX] Rename CUTLASS_MLA_VLLM_V1 to CUTLASS_MLA #21966

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Merged
merged 1 commit into from
Jul 31, 2025
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[UX] Rename CUTLASS_MLA_VLLM_V1 to CUTLASS_MLA #21966

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2 changes: 1 addition & 1 deletion vllm/engine/arg_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1417,7 +1417,7 @@ def _is_v1_supported_oracle(self, model_config: ModelConfig) -> bool:
"PALLAS_VLLM_V1",
"TRITON_ATTN_VLLM_V1",
"TRITON_MLA",
"CUTLASS_MLA_VLLM_V1",
"CUTLASS_MLA",
"FLASHMLA",
"FLASHINFER",
"FLASHINFER_VLLM_V1",
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10 changes: 5 additions & 5 deletions vllm/platforms/cuda.py
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Expand Up @@ -162,15 +162,15 @@ def check_and_update_config(cls, vllm_config: "VllmConfig") -> None:
if cls.is_device_capability(100):
# Blackwell => Force CutlassMLA.
use_cutlass_mla = True
envs.VLLM_ATTENTION_BACKEND = "CUTLASS_MLA_VLLM_V1"
envs.VLLM_ATTENTION_BACKEND = "CUTLASS_MLA"
else:
# Not Blackwell
use_flashmla = True
else:
# Forced case
use_flashmla = (envs.VLLM_ATTENTION_BACKEND == "FLASHMLA")
use_cutlass_mla = (
envs.VLLM_ATTENTION_BACKEND == "CUTLASS_MLA_VLLM_V1")
envs.VLLM_ATTENTION_BACKEND == "CUTLASS_MLA")

from vllm.attention.ops.flashmla import is_flashmla_supported
if use_flashmla and is_flashmla_supported()[0] \
Expand All @@ -182,7 +182,7 @@ def check_and_update_config(cls, vllm_config: "VllmConfig") -> None:
if use_cutlass_mla and cache_config.block_size != 128:
cache_config.block_size = 128
logger.info("Forcing kv cache block size to 128 for "
"CUTLASS_MLA_VLLM_V1 backend.")
"CUTLASS_MLA backend.")

compilation_config = vllm_config.compilation_config
if (envs.VLLM_ALL2ALL_BACKEND == "deepep_high_throughput"
Expand Down Expand Up @@ -211,9 +211,9 @@ def get_attn_backend_cls(cls, selected_backend, head_size, dtype,
kv_cache_dtype, block_size, use_v1,
use_mla) -> str:
if use_mla:
# TODO(lucas): refactor to be more concise
# TODO(lucas): refactor to be more concise
# we should probably consider factoring out V1 here
if selected_backend == _Backend.CUTLASS_MLA_VLLM_V1:
if selected_backend == _Backend.CUTLASS_MLA:
if use_v1:
logger.info_once("Using Cutlass MLA backend on V1 engine.")
return ("vllm.v1.attention.backends.mla."
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2 changes: 1 addition & 1 deletion vllm/platforms/interface.py
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Expand Up @@ -53,7 +53,7 @@ class _Backend(enum.Enum):
TRITON_MLA_VLLM_V1 = enum.auto()
FLASHMLA_VLLM_V1 = enum.auto()
FLASHMLA = enum.auto() # Supported by V1
CUTLASS_MLA_VLLM_V1 = enum.auto()
CUTLASS_MLA = enum.auto()
PALLAS = enum.auto()
PALLAS_VLLM_V1 = enum.auto()
IPEX = enum.auto()
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2 changes: 1 addition & 1 deletion vllm/v1/attention/backends/mla/cutlass_mla.py
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Expand Up @@ -21,7 +21,7 @@ class CutlassMLABackend(MLACommonBackend):

@staticmethod
def get_name() -> str:
return "CUTLASS_MLA_VLLM_V1"
return "CUTLASS_MLA"

@staticmethod
def get_impl_cls() -> type["CutlassMLAImpl"]:
Expand Down