Messages in this thread | | | Date | Tue, 5 Jan 2010 13:02:46 +0530 | Subject | Re: init_task belongs to "process 0" or "process 1"? | From | Nobin Mathew <> |
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init_task is the head of doubly linked list which holds all task_structs in the system. init_task is again the task_struct for process 0/swapper/idle task. This process is created manually (I meant to say not by copy_process() calls). Manually means they are static structures defined in the code (see INIT_TASK, init_mm, init_fs etc). There will be multiple idle task if there is more than 1 cpu core. Idle task is the one which is scheduled if there is no other task ready for scheduling.
Init task is process 1 which is initially a kernel thread created from process 0 using copy_process(), then it does an execv() (/sbin/init ) or similar one to create the normal process init.
Name given to process 0 is swapper. .comm = "swapper"
On Mon, Jan 4, 2010 at 1:37 PM, Shivdas Gujare <shivdas.tech@gmail.com> wrote: > Hi all, > > I am trying to understand the role of linux kernel "process 0" i.e. swapper. > I am not able to understand, where it gets started? and Does > "init_task" from arch/arm/kernel/init_task.c belongs to "swapper" or > "init"? > whats the purpose of "init_task"? > > Thanks for your help. > > Thanks and Regards, > Shivdas Gujare > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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