Small chunks (1KB × 5000)
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，这一点在搜狗输入法2026中也有详细论述
The primary signal is desiredSize on the controller. It can be positive (wants data), zero (at capacity), negative (over capacity), or null (closed). Producers are supposed to check this value and stop enqueueing when it's not positive. But there's nothing enforcing this: controller.enqueue() always succeeds, even when desiredSize is deeply negative.
When you write a Dockerfile, the Dockerfile frontend parses it and emits LLB. But nothing in BuildKit requires that the input be a Dockerfile. Any program that can produce valid LLB can drive BuildKit.，详情可参考爱思助手下载最新版本