Re: [PATCH] Fix deadlock in __create_workqueue

[Srivatsa Vaddagiri <vatsa@in.ibm.com>]

On Mon, May 03, 2004 at 01:08:29PM -0700, Andrew Morton wrote:
> yup, sorry, I misread the code.  Like this?

Yes, looks fine to me!

> 
> --- 25/kernel/workqueue.c~worker_thread-race-fix	Mon May  3 13:02:25 2004
> +++ 25-akpm/kernel/workqueue.c	Mon May  3 13:07:34 2004
> @@ -201,19 +201,20 @@ static int worker_thread(void *__cwq)
>  	siginitset(&sa.sa.sa_mask, sigmask(SIGCHLD));
>  	do_sigaction(SIGCHLD, &sa, (struct k_sigaction *)0);
>  
> +	set_current_state(TASK_INTERRUPTIBLE);
>  	while (!kthread_should_stop()) {
> -		set_task_state(current, TASK_INTERRUPTIBLE);
> -
>  		add_wait_queue(&cwq->more_work, &wait);
>  		if (list_empty(&cwq->worklist))
>  			schedule();
>  		else
> -			set_task_state(current, TASK_RUNNING);
> +			__set_current_state(TASK_RUNNING);
>  		remove_wait_queue(&cwq->more_work, &wait);
>  
>  		if (!list_empty(&cwq->worklist))
>  			run_workqueue(cwq);
> +		set_current_state(TASK_INTERRUPTIBLE);
>  	}
> +	__set_current_state(TASK_RUNNING);
>  	return 0;
>  }

-- 


Thanks and Regards,
Srivatsa Vaddagiri,
Linux Technology Center,
IBM Software Labs,
Bangalore, INDIA - 560017