--- Deepak Joshi <deepak_cins@xxxxxxxxxxx> wrote:
> #include <linux/module.h>
> #include <linux/kernel.h>
> #include <linux/wait.h>
> #include <linux/sched.h>
> #include <linux/list.h>
> MODULE_LICENSE("GPL");
>
>
>
> static DECLARE_WAIT_QUEUE_HEAD (my_queue);
> int init_module(void)
> {
> struct task_struct *my_task ;
> my_task = find_task_by_pid(1477);
> DECLARE_WAITQUEUE(wait, my_task);
> my_task->state = TASK_UNINTERRUPTIBLE ;
> init_waitqueue_entry( &wait, my_task);
> add_wait_queue( &my_queue , &wait);
> sleep_on(&my_queue);
> interruptible_sleep_on(&my_queue);
> schedule( );
> return 0;
> }
>
>
> void cleanuo_module()
> {
> printk("Bye");
> wake_up( &my_queue );
> }
>
>
>
>
> Hi everyone,
>
> In the above module I want to sleep the process
> having
> pid 1477 ( which is mpg123 player in my case in wait
> queue ). Instead of sleeping the process with the
> given pid it is hanging insmod command. so plz tell
> me
> what is wrong in the above code.
>
I tried the same module without schedule() function
and instead of TASK_UNINTERRUPTIBLE I used
TASK_INTERRUPTIBLE but i am getting the same result.
and the output of ps command gives D status for insmod
command. I think it is sleeping the current process
i.e insmod sleep.o only. But i want to sleep the
process of which i gave the pid. plz reply me where i
am wrong.
Thanks and regrads,
Deepak Joshi.
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