Re: stopping a process during a timer interrupt

[Kay Tiong Khoo]

Thanks!

For the record, I was trying to sleep kernel threads as well as user  
threads. That didn't work out too well.

All worked fine when I only attempted to sleep user threads.

Kay Tiong

On Oct 18, 2006, at 6:56 AM, Hagen Paul Pfeifer wrote:

> * Kay Tiong Khoo | 2006-10-17 18:18:25 [+0800]:
>
> > On a timer interrupt, I tried to stop the current process by changing
> > it's run state to TASK_STOPPED via set_current_state(TASK_STOPPED).
> > However, this results in a system hang.
> >
> > I can't find a way to stop the current process during an interrupt
> > context. Does such code exist in the kernel? If not, how does one go
> > about implementing it from within a kernel module.
>
> Take a look at some driver implementations!
> There you will find some ways how to put a process into a sleep state.
>
> Grep for "*->state*TASK_UNINTERRUPTIBLE" and take also a look at the
> interaction with schedule() and spinlocks.
>
> > Thanks.
> > Kay Tiong
>
> Best regards
>
> --
> Hagen Pfeifer

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