取而代之的是，只有包含关于数据的位置和长度的信息的描述符被追加到了套接字缓冲区。
Instead, only descriptors with information about the location and length of the data are appended to the socket buffer.
关于跟踪缓冲区，以下有些重要的事情需要注意。
There are some important things that you should note about the trace buffer.
Buffer 包含关于已创建的抽象缓冲区的信息，它还管理内存块的一个链表
The Buffer holds the information about a created abstract buffer, and it manages a linked list of memory blocks
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