The STACKoption applies only to an executable file.
STACK选项仅适用于可执行文件。
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If the CONFIG_FRAME_POINTER option was set during kernel compilation, the frame pointer register is used to maintain stacks and, hence, the stack traceback can be performed correctly.
An option that refers to a packet at the end of the queue may require a full list traversal by the receiving TCP stack in order to identify which packet the option refers to.