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Aleksei Sviridkin
5ff3cdaf8c
The binder is the only writer of a device's placement, so budget and capacity checks that admission already ran cannot be raced past by two replicas or two webhook calls. Every event collapses into one pass over all GPU objects, which serializes the decisions without per-object locks, and devices are read past the cache so a unit booked in the last pass is never booked again from a stale view. A device that carries an unanswered bind request also queues a pass that only answers requests, so the webhook, which waits seconds, is not held behind moves, usage records and status of the whole cluster. The full pass moves held sets off nodes that cannot keep them, rebinds Lost sets before new orders, and binds new orders onto the fullest node with room. Finalizers and usage records run with the feature disabled too, so turning GPU off never hangs a namespace or class deletion. The devices one VM names move, go Lost and are rebound as a set. Every pass restores that invariant before it places anything, gathering a set left partly Lost, by a write that failed half way or by a VMI that ended next to held members, onto one node or sending all of it to Lost, so each later step only ever changes whole sets. A Lost device already counts against its tenant's budgets, so the pod of its still running VMI is not counted again under a raw GPU key; for node capacity it is, since the device itself holds no units. Signed-off-by: Aleksei Sviridkin <f@lex.la> Assisted-by: LLM