From a4ad43ad5a819aabc7d9b48b46a7f11e2552befc Mon Sep 17 00:00:00 2001
From: Harry Mellor <19981378+hmellor@users.noreply.github.com>
Date: Tue, 25 Nov 2025 01:58:58 +0000
Subject: [PATCH] Scheduled removal of `ParallelConfig`'s direct child EPLB
 fields (#29324)

Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>
---
 vllm/config/parallel.py  | 50 ----------------------------------------
 vllm/engine/arg_utils.py | 24 -------------------
 2 files changed, 74 deletions(-)

diff --git a/vllm/config/parallel.py b/vllm/config/parallel.py
index ad438a8b464e..913e97250d3d 100644
--- a/vllm/config/parallel.py
+++ b/vllm/config/parallel.py
@@ -141,22 +141,6 @@ class ParallelConfig:
     - "deepep_high_throughput": Use deepep high-throughput kernels
     - "deepep_low_latency": Use deepep low-latency kernels
     - "flashinfer_all2allv": Use flashinfer alltoallv kernels for mnnvl"""
-    num_redundant_experts: int | None = None
-    """`num_redundant_experts` is deprecated and has been replaced with
-    `eplb_config.num_redundant_experts`. This will be removed in v0.12.0.
-    Please use `eplb_config.num_redundant_experts` instead."""
-    eplb_window_size: int | None = None
-    """`eplb_window_size` is deprecated and has been replaced with
-    `eplb_config.window_size`. This will be removed in v0.12.0.
-    Please use `eplb_config.window_size` instead."""
-    eplb_step_interval: int | None = None
-    """`eplb_step_interval` is deprecated and has been replaced with
-    `eplb_config.step_interval`. This will be removed in v0.12.0.
-    Please use `eplb_config.step_interval` instead."""
-    eplb_log_balancedness: bool | None = None
-    """`eplb_log_balancedness` is deprecated and has been replaced with
-    `eplb_config.log_balancedness`. This will be removed in v0.12.0.
-    Please use `eplb_config.log_balancedness` instead."""
 
     max_parallel_loading_workers: int | None = None
     """Maximum number of parallel loading workers when loading model
@@ -516,40 +500,6 @@ class ParallelConfig:
                     "--all2all-backend command-line argument instead."
                 )
 
-        # Forward deprecated fields to their new location
-        if self.num_redundant_experts is not None:
-            self.eplb_config.num_redundant_experts = self.num_redundant_experts
-            logger.warning_once(
-                "num_redundant_experts is deprecated and has been replaced "
-                "with eplb_config.num_redundant_experts. This will be removed "
-                "in v0.12.0. Changing this field after initialization will "
-                "have no effect."
-            )
-        if self.eplb_window_size is not None:
-            self.eplb_config.window_size = self.eplb_window_size
-            logger.warning_once(
-                "eplb_window_size is deprecated and has been replaced "
-                "with eplb_config.window_size. This will be removed "
-                "in v0.12.0. Changing this field after initialization will "
-                "have no effect."
-            )
-        if self.eplb_step_interval is not None:
-            self.eplb_config.step_interval = self.eplb_step_interval
-            logger.warning_once(
-                "eplb_step_interval is deprecated and has been replaced "
-                "with eplb_config.step_interval. This will be removed "
-                "in v0.12.0. Changing this field after initialization will "
-                "have no effect."
-            )
-        if self.eplb_log_balancedness is not None:
-            self.eplb_config.log_balancedness = self.eplb_log_balancedness
-            logger.warning_once(
-                "eplb_log_balancedness is deprecated and has been replaced "
-                "with eplb_config.log_balancedness. This will be removed "
-                "in v0.12.0. Changing this field after initialization will "
-                "have no effect."
-            )
-
         # Continue with the rest of the initialization
         self.world_size = (
             self.pipeline_parallel_size
diff --git a/vllm/engine/arg_utils.py b/vllm/engine/arg_utils.py
index b7c8f56e18c5..a7c6b11ccd5a 100644
--- a/vllm/engine/arg_utils.py
+++ b/vllm/engine/arg_utils.py
@@ -855,30 +855,6 @@ class EngineArgs:
             "--expert-placement-strategy",
             **parallel_kwargs["expert_placement_strategy"],
         )
-        parallel_group.add_argument(
-            "--num-redundant-experts",
-            type=int,
-            help="[DEPRECATED] --num-redundant-experts will be removed in v0.12.0.",
-            deprecated=True,
-        )
-        parallel_group.add_argument(
-            "--eplb-window-size",
-            type=int,
-            help="[DEPRECATED] --eplb-window-size will be removed in v0.12.0.",
-            deprecated=True,
-        )
-        parallel_group.add_argument(
-            "--eplb-step-interval",
-            type=int,
-            help="[DEPRECATED] --eplb-step-interval will be removed in v0.12.0.",
-            deprecated=True,
-        )
-        parallel_group.add_argument(
-            "--eplb-log-balancedness",
-            action=argparse.BooleanOptionalAction,
-            help="[DEPRECATED] --eplb-log-balancedness will be removed in v0.12.0.",
-            deprecated=True,
-        )
 
         parallel_group.add_argument(
             "--max-parallel-loading-workers",