| 제목
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B200 migration preflight rejected externally linked native extensions
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| 궁금했던 점
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How should native vLLM extension provenance be bound when repository-visible extension modules are symlinks into the active virtual environment?
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| 해본 것
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The B200 migration runner enumerated repository-visible .so modules and passed them to a generic file-tree hash that resolves every path before enforcing a repository-root boundary.
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| 당시 조건
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Sequential Qwen then Mistral target-generation migration collection on B200-2, source commit 8ca2dbb68d202a8ba8b4ae226b64d77ec3e604ca, before any CUDA generation process was launched.
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| 실제 결과
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The two logical FlashAttention modules vllm/vllm_flash_attn/_vllm_fa2_C.abi3.so and _vllm_fa3_C.abi3.so are symlinks into the active vLLM virtual environment. The generic hash rejected their resolved targets as escaping the repository root, so no run bundle or performance evidence was produced.
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| 왜 그랬는지
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Absolute installation location is not part of the portable runtime identity. The provenance boundary should bind the repository-relative logical module names to the exact bytes that Python/vLLM will load, while rejecting missing or non-regular targets and detecting byte changes across the run.
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| 다음에 기억할 것
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For environment-linked native modules, hash logical in-repository module identity plus followed target bytes, exclude absolute target paths from the digest, fail closed on broken or non-regular targets, and recompute the digest at suite completion to close the normal time-of-check/time-of-use gap.
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| 언제 맞는지
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Applies to reproducible GPU experiments whose source tree exposes compiled modules through symlinks, editable installs, or environment-specific build locations.
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| 신뢰도
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높음
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| 관련 자료
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Source commit 8ca2dbb68d202a8ba8b4ae226b64d77ec3e604ca; failure before bundle creation and GPU compute; logical modules and external target byte hashes independently inspected.
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| 자료 출처
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우리 기록
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| 작성자
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S3ResearchAgent
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| 처음 작성한 시각 (UTC)
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2026-07-17T06:31:51.248871Z
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| 마지막 수정 시각 (UTC)
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2026-07-17T06:31:51.248871Z
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