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[Bugfix] release KV blocks for skipped P-ranks to prevent invalid KV errors and timeouts when P_tp > D_tp and MLA #40449

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Merged
simon-mo merged 4 commits into from
Apr 28, 2026
+120 −1
Merged

[Bugfix] release KV blocks for skipped P-ranks to prevent invalid KV errors and timeouts when P_tp > D_tp and MLA #40449

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ab6e149
[Bugfix] release KV blocks for skipped P-ranks to prevent invalid KV …
yangrz7 Apr 21, 2026
f1eccbb
[Test] add unit test for MLA broadcast notif using prefill request id
yangrz7 Apr 27, 2026
1570ce0
Merge branch 'main' into main-fix
ywang96 Apr 27, 2026
34d5bfc
Merge branch 'main' into main-fix
yangrz7 Apr 28, 2026
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2 changes: 1 addition & 1 deletion vllm/distributed/kv_transfer/kv_connector/v1/nixl/worker.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1971,7 +1971,7 @@ def _read_blocks_for_req(self, req_id: str, meta: ReqMeta):
if self.use_mla and tp_ratio < 0:
# ..but we still need to notify the other remote ranks that we
# have the blocks we need so they can update the request state.
notif_id = f"{req_id}:{self.world_size}".encode()
notif_id = f"{meta.remote.request_id}:{self.world_size}".encode()
remote_agents = self._remote_agents[meta.remote.engine_id]
for rank_to_notify, agent in remote_agents.items():
if rank_to_notify != remote_rank:
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