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[Quantization] Support Humming W4A8 Block in CT - #53880

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neuralmagic:humming-mxfp4
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robertgshaw2-redhat wants to merge 1 commit into
vllm-project:mainfrom
neuralmagic:humming-mxfp4

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@robertgshaw2-redhat

@robertgshaw2-redhat robertgshaw2-redhat commented Aug 26, 2026 •

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Purpose

Test Plan

Test Result


Essential Elements of an Effective PR Description Checklist
  • The purpose of the PR, such as "Fix some issue (link existing issues this PR will resolve)".
  • The test plan, such as providing test command.
  • The test results, such as pasting the results comparison before and after, or e2e results
  • (Optional) The necessary documentation update, such as updating supported_models.md and examples for a new model.

Signed-off-by: Robert Shaw <robshaw@redhat.com>

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Claude Code Review

This pull request is from a fork — automated review is disabled. A repository maintainer can comment @claude review to run a one-time review.

@mergify mergify Bot added the quantization label Aug 26, 2026
@robertgshaw2-redhat robertgshaw2-redhat added the ready ONLY add when PR is ready to merge/full CI is needed label Aug 26, 2026
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/ci run

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✅ Triggered Buildkite CI #85647 for commit fcd508d213f9.

@dsikka

dsikka commented Aug 29, 2026

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@HDCharles can you take a look

self.experts_cls: type[mk.FusedMoEExperts]
if moe.moe_backend == "b12x":
if moe.moe_backend in ORACLE_MOE_BACKENDS:
self.mxfp4_backend, experts_cls = select_mxfp4_moe_backend(moe)

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seems like hte activation info needs to be routed through here too, right?

@HDCharles

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i made #55963 you can incorporate those fixes or we can land that, the main issue i see with this PR is that it doesn't update the mxfp4 oracle to actually accept humming + float8 block.

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mergify Bot commented Oct 1, 2026

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This pull request has merge conflicts that must be resolved before it can be
merged. Please rebase the PR, @robertgshaw2-redhat.

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork

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3 participants