On Thu, May 30, 2002 at 11:55:52AM +0100, venugopal panchamukhi wrote:
> Hi,
> Could anyone let me know the procedure to add a signal handler for a kernel thread which is created using kernel_thread().
AFAIK signals are delivered only on exit from kernel mode (which happens
either at the end of a syscall or after interrupt (which may have caused
the signal), scheduling being a special case of this. Since kernel
thread never leaves a kernel mode, the code to run signal handlers is
never executed. You have to check for current->signals every time you
wake up and if there is a signal, handle it. You will find all relevant
data about the signal somewhere in current. Of course you want to make
sure you sleep in TASK_INTPERRUPTIBLE state so you get scheduled when
signal arrives.
--------------------------------------------------------------------------------
- Jan Hudec `Bulb' <bulb@ucw.cz>
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