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vLLM upgrades break working setups

Outages and change3 posts from 3 people3d active+00 posts in the last 7 days, 1 the 7 days before (fading)

Posts per day

Posts per day3 posts, Aug 30 to Sep 25

The posts behind it

3, newest first
PostDate
[RFC]: Share KV transfer planning primitives across KV connectors### Problem KV transfer connectors answer the same planning questions in different places: 1. What kind of state is each cache group: attention, SSM, or other? 2. What concrete spec does each layer use, and is it MLA? 3. What byte layout does a registered cache tensor expose? 4....vllm-project/vllmCAICAIIsSep 178 days ago
[Performance]: P2P tier control path stalls behind busy source model steps## Proposal to improve performance A cold P2P KV pull from a saturated source spent 13.6-14.3 seconds in async lookup/control-plane delay even though the measured data movement took less than 0.5 seconds. The P2P work is CPU-side, but in the current implementation it is only...vllm-project/vllmniligSep 33 weeks ago
[RFC] Qwen3.8-Flash-Next: fp8_e4m3 KV cache on the QSA path — working patch, one machine, looking for corroboration## TL;DR The QSA path of `Qwen3.8-Flash-Next` refuses any KV dtype other than bf16. Most of the machinery for fp8 is already in vLLM - only the **read** side of the QSA Triton kernels was missing. Wiring it up roughly doubles the KV pool. Measured on **one** GB10 (DGX Spark,...vllm-project/vllmNanetnounouAug 303 weeks ago

Companies and products named

Company or productPosts naming it
vLLM3
GitHub1
About this problem

Evidence

3 posts from 3 people in 1 place, about 1 a week over 19 days. Mostly on vllm-project/vllm. Tools named alongside: GitHub.

Frustration Frustration 0 of 3· Seen on GitHub issues

How it was grouped

Posts that state a pain and match the "breaking-changes" rule about vLLM. First post Aug 30, 2026, latest Sep 17, 2026. Corroborated: 3 or more posts from 2 or more people or places. Method

History

  • 2026-09-25 Added: vLLM upgrades break working setups (3 posts)

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