Linux Process Management

作者: 来源:网络文章时间:2005-12-16 23:43:24

Linux Process Management(3) >             at the end of the kernel stack of each process. This
>             allowed architectures with few registers, such as x86, to
>             calculate the location of the process descriptor via the
>             stack pointer without using an extra register to store the
>             location.
>    3. P.18 Storing the Process Descriptor
>          1. The system identifies processes by a unique PID. The
>             default maximum value is 32767(up to 4294967296).
>          2. It is very useful to be able to quickly lookup the process
>             descriptor of the currently executing task, which is done
>             via the current macro. This macro must be separately
>             implemented by each supported architecture.
>    4. P.19 Process states:
>          1. The state field of the process descriptor describes the
>             current condition of the process. The value is represented
>             by one of five flags:
>                1. TASK_RUNNING: it is either currently running or on a

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