[https://nvbugs/6403909][fix] unwaive an attention backend test

[yuxianq]

Summary by CodeRabbit

• Tests
  • Removed one test waiver, allowing the related attention backend integration test to run again.

Description

Remove the DGX H100 waiver for
test_attention_backend[qwen2_0_5b_gqa_hd64-ctx-bf16-HND-p32-v1], tracked by
NVBug 6403909. The failure did not reproduce during repeated H100 stress testing,
so this test should return to normal CI coverage.

Test Coverage

• Ran unittest/_torch/attention/test_attention_backends.py::test_attention_backend
  in 100 fresh pytest processes on a single H100 at commit
  f50ca53daedc9957a7f87cb00de205b5f4323061: 932 tests passed per run,
  93,200 total.
• Parsed all 558 entries in waives.txt successfully after the removal.
• Pre-commit waiver checks passed, including duplicate detection and AST validation.

PR Checklist

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• PR description clearly explains what and why. If using CodeRabbit's summary, please make sure it makes sense.

• PR Follows TRT-LLM CODING GUIDELINES to the best of your knowledge.

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• Any new dependencies have been scanned for license and vulnerabilities

• CODEOWNERS updated if ownership changes

• Documentation updated as needed

• Update tava architecture diagram if there is a significant design change in PR.

• The reviewers assigned automatically/manually are appropriate for the PR.

• Please check this after reviewing the above items as appropriate for this PR.

GitHub Bot Help

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[yuxianq]

/bot run

[coderabbitai]

📝 Walkthrough

Walkthrough

A single SKIP entry referencing nvbugs/6403909 for the test_attention_backend test case in DGX_H100 was removed from the waives.txt test list file.

Changes

Waive list update

Layer / File(s)	Summary
Remove obsolete waive entry tests/integration/test_lists/waives.txt	Removed the SKIP entry for test_attention_backend[...] on DGX_H100 that referenced nvbugs/6403909.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Possibly related PRs

• NVIDIA/TensorRT-LLM#15898: Both PRs edit the same waives.txt file by adding/removing skip entries tied to nvbugs references.
• NVIDIA/TensorRT-LLM#15901: Both PRs modify the same waive list file by removing/adding SKIP entries for nearby nvbugs waiver sources.

Suggested reviewers: pcastonguay

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title matches the main change and follows the required ticket/type format.
Description check	✅ Passed	The description explains the change, motivation, test coverage, and includes the checklist.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

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[yuxianq]

/bot run --disable-fail-fast

[tensorrt-cicd]

PR_Github #57721 [ run ] triggered by Bot. Commit: 3279cff Link to invocation

[tensorrt-cicd]

PR_Github #57722 [ run ] triggered by Bot. Commit: 3279cff Link to invocation

[tensorrt-cicd]

PR_Github #57721 [ run ] completed with state ABORTED. Commit: 3279cff

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[tensorrt-cicd]

PR_Github #57722 [ run ] completed with state SUCCESS. Commit: 3279cff
/LLM/main/L0_MergeRequest_PR pipeline #46432 completed with status: 'SUCCESS'

CI Report

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