Re: [PATCH 1/3] Signal semantics for /sbin/init

[Oleg Nesterov <oleg-6lXkIZvqkOAvJsYlp49lxw@public.gmane.org>]

On 08/31, sukadev-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org wrote:
> 
> -static int sig_ignored(struct task_struct *t, int sig)
> +	// Currently this check is a bit racy with exec(),
> +	// we can _simplify_ de_thread and close the race.
> +	if (likely(!is_container_init(tsk->group_leader)))
> +		return 0;
> +
> +	if (!in_interrupt())
> +		return 0;

I don't understand why you are trying to mix this patch with pid_ns changes.

We don't need in_interrupt() check unless we use current do decide if the
signal goes from the parent namespace.

And in fact, I'd personally prefer to use "is_global_init()" for this patch,
because it hopefully can fix the problems we have even without namespaces.
This also matches the current check in get_signal_to_deliver().

Oleg.