Re: [Xenomai-help] signaling to a thread waiting on an event in the kernel

[Philippe Gerum <rpm@xenomai.org>]

On Mon, 2009-12-28 at 01:59 -0800, Yigal Goldberger wrote:
> Hi,
> 
> I want to have the ability to restart a process at all times.
> I have a situation where a thread is waiting on an event in the kernel with : 
> rtdm_event_timedwait(&args,0,NULL)

>   - infinite wait (I need this infinite wait ...) 
> 
> and I cannot restart it with  :
> 
> kill(Pid,SIGTERM) .
> 
> from a different process .
> 
> Suggestions are most welcome.
> 

Please be more specific:

- what happens when SIGTERM is sent, exactly? does your app hang on the
RTDM syscall invoking rtdm_event_timedwait() from your driver, or does
the entire system lock up badly?
- did you check whether rtdm_event_timedwait() returned with an error
code, such as -EINTR?
- which platform, whick kernel release, which Xenomai release are you
running?

Btw, rtdm_event_wait(&event) is a shorthand for
rtdm_event_timedwait(&event,0,NULL).

> Yigal Goldberger.
> 
> 
> 
> 
>       
> 
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> Xenomai-help@domain.hid
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-- 
Philippe.