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[V0 deprecation] Remove _VLLM_V1 suffixes from attention backend names (#25489)

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Signed-off-by: Matthew Bonanni <mbonanni@redhat.com>
Signed-off-by: Matthew Bonanni <mbonanni001@gmail.com>
This commit is contained in:
Matthew Bonanni
2025-09-25 13:37:50 -04:00
committed by GitHub
parent 71b25b0d48
commit 3468f17ebe
42 changed files with 131 additions and 174 deletions
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8
vllm/attention/selector.py
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@@ -186,6 +186,14 @@ def _cached_get_attn_backend(
# Check the environment variable and override if specified
backend_by_env_var: Optional[str] = envs.VLLM_ATTENTION_BACKEND
if backend_by_env_var is not None:
if backend_by_env_var.endswith("_VLLM_V1"):
logger.warning(
"The suffix '_VLLM_V1' in the environment variable "
"%s is no longer necessary as V0 backends have been "
"deprecated. Please remove this suffix from your "
"environment variable setting.", STR_BACKEND_ENV_VAR)
backend_by_env_var = backend_by_env_var.removesuffix(
"_VLLM_V1")
selected_backend = backend_name_to_enum(backend_by_env_var)
if selected_backend is None:
raise ValueError(