• 同步调用可以通过编程来实现带有超时设置,如果调用一定时间内返回调用WebServices可能取消锁定,系统退出。

    Synchronous calls can be programmed, but with timeouts so that if the call can't come back in a certain time, the calling Web service can be unlocked to exit from the system.

    youdao

  • 步骤数据内核空间缓冲区复制用户空间缓冲区,之后系统调用read返回导致了内核空间用户空间的上下文切换

    Step two: data is copied from the kernel buffer into the user buffer, and the read system call returns. The return from the call caused a context switch from kernel back to user mode.

    youdao

  • 系统调用返回后,最终执行syscall_exit,并调用resume_userspace返回用户空间。

    Upon return from the system call, syscall_exit is eventually reached, and a call to resume_userspace transitions back to user-space.

    youdao

  • 系统调用返回后,最终执行syscall_exit,并调用resume_userspace返回用户空间。

    Upon return from the system call, syscall_exit is eventually reached, and a call to resume_userspace transitions back to user-space.

    youdao

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