Re: [PATCH] prctl: add PR_{GET,SET}_KILL_DESCENDANTS_ON_EXIT

[Oleg Nesterov]

On 11/27, Jürg Billeter wrote:
>
> @@ -704,6 +713,9 @@ static void exit_notify(struct task_struct *tsk, int group_dead)
>  	struct task_struct *p, *n;
>  	LIST_HEAD(dead);
>  
> +	if (group_dead && tsk->signal->kill_descendants_on_exit)
> +		walk_process_tree(tsk, kill_descendant_visitor, NULL);

Well, this is not exactly right, at least this is suboptimal in that
other sub-threads can too call walk_process_tree(kill_descendant_visitor)
later for no reason.