[Mamba] Fix long-prefill accuracy drop in radix prefix-cache state restore (#29368)

2026-07-06 13:57:44 -07:00
parent ca73c77055
commit 093256aa4b
1 changed files with 0 additions and 5 deletions
@@ -241,11 +241,6 @@ class Mamba2Metadata(ForwardMetadata):
        context_lens_tensor = forward_batch.extend_prefix_lens
        assert context_lens_tensor is not None
        has_initial_states = context_lens_tensor > 0
-        mamba_track_mask = getattr(forward_batch, "mamba_track_mask", None)
-        if mamba_track_mask is not None:
-            has_initial_states = (
-                has_initial_states & mamba_track_mask[: has_initial_states.shape[0]]
-            )
        prep_initial_states = torch.any(has_initial_states[:num_prefills]).item()

        query_start_loc = forward_metadata.query_start_loc[: num_prefills + 1]