Revert RuntimeContext config-namespace reads/roles (#31813–#31817) (#32100)

python/sglang/srt/multiplex/multiplexing_mixin.py

@@ -21,7 +21,6 @@ from sglang.srt.multiplex.pdmux_context import (
     load_pdmux_config,
     set_current_stream_idx,
 )
-from sglang.srt.runtime_context import get_disagg
 
 if TYPE_CHECKING:
     from sglang.srt.managers.schedule_batch import ScheduleBatch
@@ -37,7 +36,7 @@ class SchedulerMultiplexMixin:
         self.split_prefill_batch: Optional[ScheduleBatch] = None
 
         # for pd_multiplexing, Init stream_groups, exclude normal stream for prefill only and decode only
-        self.pdmux_config = load_pdmux_config(get_disagg().pdmux_config_path)
+        self.pdmux_config = load_pdmux_config(self.server_args.pdmux_config_path)
         initialize_stream_groups(self.gpu_id, self.pdmux_config)
         self.stream_groups = get_stream_groups()
         self.sm_counts = get_sm_counts()