fix(kv): allow engine-driven expandable segments - #553
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📝 WalkthroughWalkthroughThe KV transfer compatibility check now allows ChangesLMCache expandable segments compatibility
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🔵 Low · up to The validator now allows engine-driven LMCache configurations with PyTorch expandable segments, while continuing to reject other modes. A custom external connector using the same configured name could bypass the allocator compatibility guard and cause KV-transfer corruption or availability failures, so the change is mergeable with explicit owner awareness and follow-up to bind the exemption to a trusted implementation or capability. Suggested reviewers: 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In `@tests/v1/kv_connector/unit/test_config.py`:
- Line 104: Update the _build_config docstring to use Google-style Args:,
Returns:, and Raises: sections, documenting all helper parameters including
kv_connector_extra_config and stating that it returns a VllmConfig with its
applicable error behavior.
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Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
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tests/v1/kv_connector/unit/test_config.pyvllm/config/vllm.py
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R26 packaged-integration validation: this pull request is included in |
R27 integration validationThe change represented by this PR is included in the qualified, source-locked Qualification used four stock-clock RTX PRO 6000 Blackwell Workstation Edition
FP8 no-speculation and NVFP4 DFlash2 external-cache configurations also passed This is an integration and regression gate, not an isolated attribution of the |
1328cb4
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local-inference-lab:dev/jovian-judgement
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Included in Source validation: replaying all 32 R35 review heads on the pinned base exactly reproduces the released Docker's vLLM tree; all 6,870 installed tracked files match. JJ additionally preserves Luke's DS4.1 work and #734. The final composition passed 247 focused checkpoint/scheduler, sampler/warmup and native GPU tests. This is combined-source evidence, not a fresh performance or full-model qualification for this individual PR. Publication-history clarification: the individual merge linked above is in JJ's first-parent history. It replaces the receipt's archived wrapper-merge reference; GitHub's historical merge SHA may still identify that archive. See #731 for component review order and qualification limits. |
Preserve the reviewed source head c6b1530 and its contributor history. The first parent records the ordered serving-source composition. Whole-tree equality and installed-artifact verification are publication gates. Review: #553 Assisted-by: OpenAI Codex Signed-off-by: Martin Vit <martin@voipmonitor.org>
2 participants
Summary
Make the expandable-segments validator transfer-mode aware for LMCache MP.
lmcache_drivenstill requires the shareable cuMem allocatorengine_drivenremains valid with PyTorch expandable segments because vLLM workers own gather/scatterTests
Duplicate-work note
No open Jovian Judgement PR isolates this validator behavior. This is intentionally separate from the cuMem transport PR.
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Summary by CodeRabbit
expandable_segments:Trueand the LMCache KV connector when using engine-driven transfer mode.