Re: Query: Real time process

[Denis Borisevich <dennisfen@xxxxxxxxx>]

Hi, Chetan Nanda,

2009/3/22 Chetan Nanda <chetannanda@xxxxxxxxx>:
> Hi All,
>
> I am experimenting with real time process on kernel version 2.6.24 (under
> UML) and having root privileges.
> I have written a simple code as follow:
>
> /*##############################*/
> int main()
> {
>     pid_t pid;
>     struct sched_param param;
>     pid = getpid();
>     memset((void *)&param, 0 , sizeof(struct sched_param));
>     param.sched_priority = 30;
>
>     /*change the priority to rt*/
>     sched_setscheduler(pid,SCHED_FIFO, &param);
>
>     while(1);
> }
> /*##############################*/
>
> On running this program cause system to hangs and this is as per the real
> time task implementation in the kernel.
> Which says a rt task with policy equal to 'SCHED_FIFO' will run till it
> voluntarily release CPU.
>
> Is there any way to kill such task? Isn't this kind of behavior compromising
> system security?
>
> ~~
> Chetan Nanda
>

You could try the RT watchdog. Under this link there's article
describing how it works:
http://rt.wiki.kernel.org/index.php/RT_Watchdog

--
Denis

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