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如果用户态中断的fd被关闭发送方依然执行了uipi.send怎么办 #4

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@wangzhankun
  1. 目前在关闭fd时只是清理了uintrfd_ctx->uvec,如果在关闭fd之后,uipi.send被执行了似乎依然可以向发送者发送用户态中断。
  2. 当发送者在注册用户态中断之前,如果接收方就关闭了fd,用户态中断发送方是否依然会被注册呢?

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