Revert "[Attention][FA3] Update FA3 to include new swizzle optimization"#33841
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Revert "[Attention][FA3] Update FA3 to include new swizzle optimization"#33841
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This pull request reverts a previous change that introduced a swizzle optimization in FA3, which was identified as a potential cause for test failures. The revert includes changing the GIT_TAG for the flash-attention dependency back to a previous commit and restoring the scheduler_metadata size calculation in flash_attn.py and flashattn_mla.py. The changes are a clean and necessary revert to address the correctness issues. The code looks good.
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Plausible fix in #33854 |
LucasWilkinson
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Feb 5, 2026
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#33854 sadly does not fix the test, moving forward with this revert |
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…on" (vllm-project#33841) Signed-off-by: Eric Waller <e@ewaller.com>
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…ion" (vllm-project#33841) This reverts commit e3bf79f.
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…ion" (vllm-project#33841) This reverts commit e3bf79f.
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…ion" (vllm-project#33841) This reverts commit e3bf79f.
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…ion" (vllm-project#33841) This reverts commit e3bf79f. Signed-off-by: Lucas Wilkinson <lwilkins@redhat.com>
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Reverts #23465
As described in #33802, #23465 broke the Distributed Tests 2 GPUs (H100).
Note that since the tests have been slightly refactored so the failing test (
test_async_tp.py::test_async_pass_correctness) is now in a new group after #33293. The full CI run for that PR is here:This PR gets both the new tests green (old were already green above).